Import wiredtiger: 40e3225e55ffbf0c9819af138fa4a014c0639c72 from branch mongodb-4.2

ref: 9b85ad8968..40e3225e55
for: 4.3.1

WT-4477       Add eviction debug mode and extra checks
WT-4494       Support import of of standalone WiredTiger files
WT-4580       Abort transactions that perform updates with ignore_prepare=true
WT-4719       Non-zero update count detected when committing prepared transaction
WT-4787       Coverity: Potential infinite loops
WT-4790       Coverity: Memory leak within __wt_curbulk_init
WT-4827       Apply commit timestamps when a truncated page is read
WT-4829       File names are generated incorrectly in operation tracking scripts
WT-4837       Disabled cache during verify
WT-4839       Add a feature to python testsuite to run a random subset of tests
WT-4844       Only log an informational message when a set read-timestamp is older than the oldest timestamp
WT-4848       Fix perf regression when calculating differences
WT-4850       Fix __slvg_checkpoint() metadata memory leak
WT-4851       heap-use-after-free when block manager grows buffer during final checkpoint
WT-4852       Evergreen runs of test/format require shared library extensions
WT-4853       Standalone recovery code cannot handle deleted checkpoints
WT-4854       wt utility list command has a memory leak and minor error handling bugs
WT-4855       WiredTiger recovery should detect files without unique IDs
WT-4859       Fix test/format program path issue for endian tests

84 files changed, 2589 insertions, 938 deletions

diff --git a/src/third_party/wiredtiger/SConstruct b/src/third_party/wiredtiger/SConstruct
index 20916ac8da0..786dff93a6d 100644
--- a/src/third_party/wiredtiger/SConstruct
+++ b/src/third_party/wiredtiger/SConstruct
@@ -290,12 +290,13 @@ Default(wtlib, wtdll)
 wtbin = env.Program("wt", [
     "src/utilities/util_alter.c",
     "src/utilities/util_backup.c",
-    "src/utilities/util_cpyright.c",
     "src/utilities/util_compact.c",
+    "src/utilities/util_cpyright.c",
     "src/utilities/util_create.c",
     "src/utilities/util_downgrade.c",
     "src/utilities/util_drop.c",
     "src/utilities/util_dump.c",
+    "src/utilities/util_import.c",
     "src/utilities/util_list.c",
     "src/utilities/util_load.c",
     "src/utilities/util_load_json.c",
diff --git a/src/third_party/wiredtiger/build_posix/Make.base b/src/third_party/wiredtiger/build_posix/Make.base
index 7543b346ea5..db8ae2fabf4 100644
--- a/src/third_party/wiredtiger/build_posix/Make.base
+++ b/src/third_party/wiredtiger/build_posix/Make.base
@@ -19,6 +19,7 @@ wt_SOURCES =\
 	src/utilities/util_downgrade.c \
 	src/utilities/util_drop.c \
 	src/utilities/util_dump.c \
+	src/utilities/util_import.c \
 	src/utilities/util_list.c \
 	src/utilities/util_load.c \
 	src/utilities/util_load_json.c \
diff --git a/src/third_party/wiredtiger/build_posix/Make.subdirs b/src/third_party/wiredtiger/build_posix/Make.subdirs
index d598c74c631..a7fc291fc61 100644
--- a/src/third_party/wiredtiger/build_posix/Make.subdirs
+++ b/src/third_party/wiredtiger/build_posix/Make.subdirs
@@ -37,6 +37,7 @@ test/cursor_order
 test/fops
 test/format
 test/huge
+test/import
 test/manydbs
 test/packing
 test/readonly
diff --git a/src/third_party/wiredtiger/dist/api_data.py b/src/third_party/wiredtiger/dist/api_data.py
index 37b84df00e1..146d6c06668 100644
--- a/src/third_party/wiredtiger/dist/api_data.py
+++ b/src/third_party/wiredtiger/dist/api_data.py
@@ -495,6 +495,12 @@ connection_runtime_config = [
             adjust log archiving to retain the log records of this number
             of checkpoints. Zero or one means perform normal archiving.''',
             min='0', max='1024'),
+        Config('eviction', 'false', r'''
+            if true, modify internal algorithms to change skew to force
+            lookaside eviction to happen more aggressively. This includes but
+            is not limited to not skewing newest, not favoring leaf pages,
+            and modifying the eviction score mechanism.''',
+            type='boolean'),
         Config('rollback_error', '0', r'''
             return a WT_ROLLBACK error from a transaction operation about
             every Nth operation to simulate a collision''',
@@ -1109,6 +1115,8 @@ methods = {
         type='boolean'),
 ]),
 
+'WT_SESSION.import' : Method([]),
+
 'WT_SESSION.join' : Method([
     Config('compare', '"eq"', r'''
         modifies the set of items to be returned so that the index key
diff --git a/src/third_party/wiredtiger/dist/filelist b/src/third_party/wiredtiger/dist/filelist
index 036b1a8b1a9..c529ebc0366 100644
--- a/src/third_party/wiredtiger/dist/filelist
+++ b/src/third_party/wiredtiger/dist/filelist
@@ -6,6 +6,7 @@ src/async/async_op.c
 src/async/async_worker.c
 src/block/block_addr.c
 src/block/block_ckpt.c
+src/block/block_ckpt_scan.c
 src/block/block_compact.c
 src/block/block_ext.c
 src/block/block_map.c
@@ -26,6 +27,7 @@ src/btree/bt_delete.c
 src/btree/bt_discard.c
 src/btree/bt_handle.c
 src/btree/bt_huffman.c
+src/btree/bt_import.c
 src/btree/bt_io.c
 src/btree/bt_misc.c
 src/btree/bt_ovfl.c
@@ -185,7 +187,6 @@ src/schema/schema_worker.c
 src/session/session_api.c
 src/session/session_compact.c
 src/session/session_dhandle.c
-src/session/session_salvage.c
 src/support/cond_auto.c
 src/support/crypto.c
 src/support/err.c
diff --git a/src/third_party/wiredtiger/dist/s_define.list b/src/third_party/wiredtiger/dist/s_define.list
index e82ef2ad31f..1c9121da3f2 100644
--- a/src/third_party/wiredtiger/dist/s_define.list
+++ b/src/third_party/wiredtiger/dist/s_define.list
@@ -16,6 +16,7 @@ WT_ATOMIC_CAS
 WT_ATOMIC_CAS_FUNC
 WT_ATOMIC_FUNC
 WT_BLOCK_DESC_SIZE
+WT_BLOCK_EXTLIST_VERSION_ORIG
 WT_BLOCK_HEADER_SIZE
 WT_CACHE_LINE_ALIGNMENT
 WT_CACHE_LINE_PAD_BEGIN
diff --git a/src/third_party/wiredtiger/dist/s_string.ok b/src/third_party/wiredtiger/dist/s_string.ok
index 06e58b46236..d8f89a9e6b9 100644
--- a/src/third_party/wiredtiger/dist/s_string.ok
+++ b/src/third_party/wiredtiger/dist/s_string.ok
@@ -105,6 +105,7 @@ DeadStores
 Decrement
 Decrypt
 DeleteFileW
+Dh
 EACCES
 EAGAIN
 EB
@@ -526,6 +527,7 @@ buf
 bufsz
 bugfix
 bugfixes
+builddir
 builtin
 builtins
 bytelock
diff --git a/src/third_party/wiredtiger/dist/stat_data.py b/src/third_party/wiredtiger/dist/stat_data.py
index 478830108f3..92008c8f7e0 100644
--- a/src/third_party/wiredtiger/dist/stat_data.py
+++ b/src/third_party/wiredtiger/dist/stat_data.py
@@ -514,6 +514,8 @@ connection_stats = [
     SessionOpStat('session_table_create_success', 'table create successful calls', 'no_clear,no_scale'),
     SessionOpStat('session_table_drop_fail', 'table drop failed calls', 'no_clear,no_scale'),
     SessionOpStat('session_table_drop_success', 'table drop successful calls', 'no_clear,no_scale'),
+    SessionOpStat('session_table_import_fail', 'table import failed calls', 'no_clear,no_scale'),
+    SessionOpStat('session_table_import_success', 'table import successful calls', 'no_clear,no_scale'),
     SessionOpStat('session_table_rebalance_fail', 'table rebalance failed calls', 'no_clear,no_scale'),
     SessionOpStat('session_table_rebalance_success', 'table rebalance successful calls', 'no_clear,no_scale'),
     SessionOpStat('session_table_rename_fail', 'table rename failed calls', 'no_clear,no_scale'),
diff --git a/src/third_party/wiredtiger/examples/c/ex_all.c b/src/third_party/wiredtiger/examples/c/ex_all.c
index 9f1e1df17f3..5e5dbee6c03 100644
--- a/src/third_party/wiredtiger/examples/c/ex_all.c
+++ b/src/third_party/wiredtiger/examples/c/ex_all.c
@@ -603,16 +603,8 @@ named_snapshot_ops(WT_SESSION *session)
 }
 
 static void
-session_ops(WT_SESSION *session)
+session_ops_create(WT_SESSION *session)
 {
-	WT_CONNECTION *conn;
-
-	conn = session->connection;
-
-	/*! [Reconfigure a session] */
-	error_check(session->reconfigure(session, "isolation=snapshot"));
-	/*! [Reconfigure a session] */
-
 	/*! [Create a table] */
 	error_check(session->create(session,
 	    "table:mytable", "key_format=S,value_format=S"));
@@ -622,12 +614,6 @@ session_ops(WT_SESSION *session)
 	/*! [Create a column-store table] */
 	error_check(session->create(session,
 	    "table:mytable", "key_format=r,value_format=S"));
-
-	/*! [Alter a table] */
-	error_check(session->alter(session,
-	    "table:mytable", "access_pattern_hint=random"));
-	/*! [Alter a table] */
-
 	/*! [Create a column-store table] */
 	error_check(session->drop(session, "table:mytable", NULL));
 
@@ -736,16 +722,41 @@ session_ops(WT_SESSION *session)
 	    "key_format=r,value_format=S,cache_resident=true"));
 	/*! [Create a cache-resident object] */
 	error_check(session->drop(session, "table:mytable", NULL));
+}
 
+static void
+session_ops(WT_SESSION *session)
+{
+	WT_CONNECTION *conn;
+
+	conn = session->connection;
+
+	/* WT_SESSION.create operations. */
+	session_ops_create(session);
+
+	/*! [Reconfigure a session] */
+	error_check(session->reconfigure(session, "isolation=snapshot"));
+	/*! [Reconfigure a session] */
 	{
 	/* Create a table for the session operations. */
 	error_check(session->create(
 	    session, "table:mytable", "key_format=S,value_format=S"));
 
+	/*! [Alter a table] */
+	error_check(session->alter(session,
+	    "table:mytable", "access_pattern_hint=random"));
+	/*! [Alter a table] */
+
 	/*! [Compact a table] */
 	error_check(session->compact(session, "table:mytable", NULL));
 	/*! [Compact a table] */
 
+#ifdef MIGHT_NOT_RUN
+	/*! [Import a file] */
+	error_check(session->import(session, "file:import", NULL));
+	/*! [Import a file] */
+#endif
+
 	/*! [Rebalance a table] */
 	error_check(session->rebalance(session, "table:mytable", NULL));
 	/*! [Rebalance a table] */
diff --git a/src/third_party/wiredtiger/import.data b/src/third_party/wiredtiger/import.data
index 22114815861..d5a8a1b8330 100644
--- a/src/third_party/wiredtiger/import.data
+++ b/src/third_party/wiredtiger/import.data
@@ -1,5 +1,5 @@
 {
-    "commit": "9b85ad89688bd72b8a649d844a7e458832955764", 
+    "commit": "40e3225e55ffbf0c9819af138fa4a014c0639c72", 
     "github": "wiredtiger/wiredtiger.git", 
     "vendor": "wiredtiger", 
     "branch": "mongodb-4.2"
diff --git a/src/third_party/wiredtiger/lang/java/java_doc.i b/src/third_party/wiredtiger/lang/java/java_doc.i
index 8b363ee4cf7..fa6a4c883c4 100644
--- a/src/third_party/wiredtiger/lang/java/java_doc.i
+++ b/src/third_party/wiredtiger/lang/java/java_doc.i
@@ -36,6 +36,7 @@ COPYDOC(__wt_session, WT_SESSION, reconfigure)
 COPYDOC(__wt_session, WT_SESSION, open_cursor)
 COPYDOC(__wt_session, WT_SESSION, alter)
 COPYDOC(__wt_session, WT_SESSION, create)
+COPYDOC(__wt_session, WT_SESSION, import)
 COPYDOC(__wt_session, WT_SESSION, compact)
 COPYDOC(__wt_session, WT_SESSION, drop)
 COPYDOC(__wt_session, WT_SESSION, join)
diff --git a/src/third_party/wiredtiger/src/block/block_addr.c b/src/third_party/wiredtiger/src/block/block_addr.c
index f08e4430a73..d7b0c56bd56 100644
--- a/src/third_party/wiredtiger/src/block/block_addr.c
+++ b/src/third_party/wiredtiger/src/block/block_addr.c
@@ -206,7 +206,7 @@ __wt_block_ckpt_decode(WT_SESSION *wt_session,
  */
 int
 __wt_block_ckpt_to_buffer(WT_SESSION_IMPL *session,
-    WT_BLOCK *block, uint8_t **pp, WT_BLOCK_CKPT *ci)
+    WT_BLOCK *block, uint8_t **pp, WT_BLOCK_CKPT *ci, bool skip_avail)
 {
 	uint64_t a;
 
@@ -220,8 +220,11 @@ __wt_block_ckpt_to_buffer(WT_SESSION_IMPL *session,
 	    ci->root_offset, ci->root_size, ci->root_checksum));
 	WT_RET(__wt_block_addr_to_buffer(block, pp,
 	    ci->alloc.offset, ci->alloc.size, ci->alloc.checksum));
-	WT_RET(__wt_block_addr_to_buffer(block, pp,
-	    ci->avail.offset, ci->avail.size, ci->avail.checksum));
+	if (skip_avail)
+		WT_RET(__wt_block_addr_to_buffer(block, pp, 0, 0, 0));
+	else
+		WT_RET(__wt_block_addr_to_buffer(block, pp,
+		    ci->avail.offset, ci->avail.size, ci->avail.checksum));
 	WT_RET(__wt_block_addr_to_buffer(block, pp,
 	    ci->discard.offset, ci->discard.size, ci->discard.checksum));
 	a = (uint64_t)ci->file_size;
@@ -231,3 +234,81 @@ __wt_block_ckpt_to_buffer(WT_SESSION_IMPL *session,
 
 	return (0);
 }
+
+/*
+ * __wt_ckpt_verbose --
+ *	Display a printable string representation of a checkpoint.
+ */
+void
+__wt_ckpt_verbose(WT_SESSION_IMPL *session, WT_BLOCK *block,
+    const char *tag, const char *ckpt_name, const uint8_t *ckpt_string)
+{
+	WT_BLOCK_CKPT *ci, _ci;
+	WT_DECL_ITEM(tmp);
+	WT_DECL_RET;
+
+	if (ckpt_string == NULL) {
+		__wt_verbose_worker(session,
+		    "%s: %s: %s%s[Empty]", block->name, tag,
+		    ckpt_name ? ckpt_name : "",
+		    ckpt_name ? ": " : "");
+		return;
+	}
+
+	/* Initialize the checkpoint, crack the cookie. */
+	ci = &_ci;
+	WT_ERR(__wt_block_ckpt_init(session, ci, "string"));
+	WT_ERR(__wt_block_buffer_to_ckpt(session, block, ckpt_string, ci));
+
+	WT_ERR(__wt_scr_alloc(session, 0, &tmp));
+	WT_ERR(__wt_buf_fmt(session, tmp, "version=%" PRIu8, ci->version));
+	if (ci->root_offset == WT_BLOCK_INVALID_OFFSET)
+		WT_ERR(__wt_buf_catfmt(session, tmp, ", root=[Empty]"));
+	else
+		WT_ERR(__wt_buf_catfmt(session, tmp,
+		    ", root=[%"
+		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
+		    (uintmax_t)ci->root_offset,
+		    (uintmax_t)(ci->root_offset + ci->root_size),
+		    ci->root_size, ci->root_checksum));
+	if (ci->alloc.offset == WT_BLOCK_INVALID_OFFSET)
+		WT_ERR(__wt_buf_catfmt(session, tmp, ", alloc=[Empty]"));
+	else
+		WT_ERR(__wt_buf_catfmt(session, tmp,
+		    ", alloc=[%"
+		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
+		    (uintmax_t)ci->alloc.offset,
+		    (uintmax_t)(ci->alloc.offset + ci->alloc.size),
+		    ci->alloc.size, ci->alloc.checksum));
+	if (ci->avail.offset == WT_BLOCK_INVALID_OFFSET)
+		WT_ERR(__wt_buf_catfmt(session, tmp, ", avail=[Empty]"));
+	else
+		WT_ERR(__wt_buf_catfmt(session, tmp,
+		    ", avail=[%"
+		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
+		    (uintmax_t)ci->avail.offset,
+		    (uintmax_t)(ci->avail.offset + ci->avail.size),
+		    ci->avail.size, ci->avail.checksum));
+	if (ci->discard.offset == WT_BLOCK_INVALID_OFFSET)
+		WT_ERR(__wt_buf_catfmt(session, tmp, ", discard=[Empty]"));
+	else
+		WT_ERR(__wt_buf_catfmt(session, tmp,
+		    ", discard=[%"
+		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
+		    (uintmax_t)ci->discard.offset,
+		    (uintmax_t)(ci->discard.offset + ci->discard.size),
+		    ci->discard.size, ci->discard.checksum));
+	WT_ERR(__wt_buf_catfmt(session, tmp,
+	    ", file size=%" PRIuMAX, (uintmax_t)ci->file_size));
+	WT_ERR(__wt_buf_catfmt(session, tmp,
+	    ", checkpoint size=%" PRIu64, ci->ckpt_size));
+
+	__wt_verbose_worker(session,
+	    "%s: %s: %s%s%s",
+	    block->name, tag,
+	    ckpt_name ? ckpt_name : "",
+	    ckpt_name ? ": " : "", (const char *)tmp->data);
+
+err:	__wt_scr_free(session, &tmp);
+	__wt_block_ckpt_destroy(session, ci);
+}
diff --git a/src/third_party/wiredtiger/src/block/block_ckpt.c b/src/third_party/wiredtiger/src/block/block_ckpt.c
index 40b0fef5a29..db6b458d671 100644
--- a/src/third_party/wiredtiger/src/block/block_ckpt.c
+++ b/src/third_party/wiredtiger/src/block/block_ckpt.c
@@ -9,10 +9,8 @@
 #include "wt_internal.h"
 
 static int __ckpt_process(WT_SESSION_IMPL *, WT_BLOCK *, WT_CKPT *);
-static int __ckpt_string(
-	WT_SESSION_IMPL *, WT_BLOCK *, const uint8_t *, WT_ITEM *);
-static int __ckpt_update(
-	WT_SESSION_IMPL *, WT_BLOCK *, WT_CKPT *, WT_BLOCK_CKPT *, bool);
+static int __ckpt_update(WT_SESSION_IMPL *,
+	WT_BLOCK *, WT_CKPT *, WT_CKPT *, WT_BLOCK_CKPT *, bool);
 
 /*
  * __wt_block_ckpt_init --
@@ -49,7 +47,6 @@ __wt_block_checkpoint_load(WT_SESSION_IMPL *session, WT_BLOCK *block,
     uint8_t *root_addr, size_t *root_addr_sizep, bool checkpoint)
 {
 	WT_BLOCK_CKPT *ci, _ci;
-	WT_DECL_ITEM(tmp);
 	WT_DECL_RET;
 	uint8_t *endp;
 
@@ -62,15 +59,8 @@ __wt_block_checkpoint_load(WT_SESSION_IMPL *session, WT_BLOCK *block,
 
 	ci = NULL;
 
-	if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT)) {
-		if (addr != NULL) {
-			WT_ERR(__wt_scr_alloc(session, 0, &tmp));
-			WT_ERR(__ckpt_string(session, block, addr, tmp));
-		}
-		__wt_verbose(session, WT_VERB_CHECKPOINT,
-		    "%s: load-checkpoint: %s", block->name,
-		    addr == NULL ? "[Empty]" : (const char *)tmp->data);
-	}
+	if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT))
+		__wt_ckpt_verbose(session, block, "load", NULL, addr);
 
 	/*
 	 * There's a single checkpoint in the file that can be written, all of
@@ -153,7 +143,6 @@ err:		/*
 	if (checkpoint && ci != NULL)
 		__wt_block_ckpt_destroy(session, ci);
 
-	__wt_scr_free(session, &tmp);
 	return (ret);
 }
 
@@ -388,7 +377,6 @@ __ckpt_process(WT_SESSION_IMPL *session, WT_BLOCK *block, WT_CKPT *ckptbase)
 {
 	WT_BLOCK_CKPT *a, *b, *ci;
 	WT_CKPT *ckpt, *next_ckpt;
-	WT_DECL_ITEM(tmp);
 	WT_DECL_RET;
 	uint64_t ckpt_size;
 	bool deleting, fatal, locked;
@@ -544,15 +532,10 @@ __ckpt_process(WT_SESSION_IMPL *session, WT_BLOCK *block, WT_CKPT *ckptbase)
 		    !F_ISSET(ckpt, WT_CKPT_DELETE))
 			continue;
 
-		if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT)) {
-			if (tmp == NULL)
-				WT_ERR(__wt_scr_alloc(session, 0, &tmp));
-			WT_ERR(__ckpt_string(
-			    session, block, ckpt->raw.data, tmp));
-			__wt_verbose(session, WT_VERB_CHECKPOINT,
-			    "%s: delete-checkpoint: %s: %s",
-			    block->name, ckpt->name, (const char *)tmp->data);
-		}
+		if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT))
+			__wt_ckpt_verbose(session,
+			    block, "delete", ckpt->name, ckpt->raw.data);
+
 		/*
 		 * Find the checkpoint into which we'll roll this checkpoint's
 		 * blocks: it's the next real checkpoint in the list, and it
@@ -642,8 +625,8 @@ __ckpt_process(WT_SESSION_IMPL *session, WT_BLOCK *block, WT_CKPT *ckptbase)
 	/* Update checkpoints marked for update. */
 	WT_CKPT_FOREACH(ckptbase, ckpt)
 		if (F_ISSET(ckpt, WT_CKPT_UPDATE))
-			WT_ERR(__ckpt_update(
-			    session, block, ckpt, ckpt->bpriv, false));
+			WT_ERR(__ckpt_update(session,
+			    block, ckptbase, ckpt, ckpt->bpriv, false));
 
 live_update:
 	/* Truncate the file if that's possible. */
@@ -686,7 +669,8 @@ live_update:
 			ci->ckpt_size =
 			    WT_MIN(ckpt_size, (uint64_t)block->size);
 
-			WT_ERR(__ckpt_update(session, block, ckpt, ci, true));
+			WT_ERR(__ckpt_update(
+			    session, block, ckptbase, ckpt, ci, true));
 		}
 
 	/*
@@ -733,7 +717,6 @@ err:	if (ret != 0 && fatal) {
 		if ((ci = ckpt->bpriv) != NULL)
 			__wt_block_ckpt_destroy(session, ci);
 
-	__wt_scr_free(session, &tmp);
 	return (ret);
 }
 
@@ -742,10 +725,10 @@ err:	if (ret != 0 && fatal) {
  *	Update a checkpoint.
  */
 static int
-__ckpt_update(WT_SESSION_IMPL *session,
-    WT_BLOCK *block, WT_CKPT *ckpt, WT_BLOCK_CKPT *ci, bool is_live)
+__ckpt_update(WT_SESSION_IMPL *session, WT_BLOCK *block,
+    WT_CKPT *ckptbase, WT_CKPT *ckpt, WT_BLOCK_CKPT *ci, bool is_live)
 {
-	WT_DECL_ITEM(tmp);
+	WT_DECL_ITEM(a);
 	WT_DECL_RET;
 	uint8_t *endp;
 
@@ -764,6 +747,37 @@ __ckpt_update(WT_SESSION_IMPL *session,
 	WT_RET(__wt_block_extlist_write(session, block, &ci->discard, NULL));
 
 	/*
+	 * If this is the final block, we append an incomplete copy of the
+	 * checkpoint information to the avail list for standalone retrieval.
+	 */
+	if (is_live) {
+		/*
+		 * Copy the INCOMPLETE checkpoint information into the
+		 * checkpoint.
+		 */
+		WT_RET(__wt_buf_init(
+		    session, &ckpt->raw, WT_BLOCK_CHECKPOINT_BUFFER));
+		endp = ckpt->raw.mem;
+		WT_RET(__wt_block_ckpt_to_buffer(
+		    session, block, &endp, ci, true));
+		ckpt->raw.size = WT_PTRDIFF(endp, ckpt->raw.mem);
+
+		/*
+		 * Convert the INCOMPLETE checkpoint array into its metadata
+		 * representation. This must match what is eventually written
+		 * into the metadata file, in other words, everything must be
+		 * initialized before the block manager does the checkpoint.
+		 */
+		WT_RET(__wt_scr_alloc(session, 8 * 1024, &a));
+		ret = __wt_meta_ckptlist_to_meta(session, ckptbase, a);
+		if (ret == 0)
+			ret = __wt_strndup(
+			    session, a->data, a->size, &ckpt->block_checkpoint);
+		__wt_scr_free(session, &a);
+		WT_RET(ret);
+	}
+
+	/*
 	 * We only write an avail list for the live system, other checkpoint's
 	 * avail lists are static and never change.
 	 *
@@ -775,9 +789,13 @@ __ckpt_update(WT_SESSION_IMPL *session,
 	 * it's not truly available until the new checkpoint locations have been
 	 * saved to the metadata.
 	 */
-	if (is_live)
-		WT_RET(__wt_block_extlist_write(
-		    session, block, &ci->avail, &ci->ckpt_avail));
+	if (is_live) {
+		block->final_ckpt = ckpt;
+		ret = __wt_block_extlist_write(
+		    session, block, &ci->avail, &ci->ckpt_avail);
+		block->final_ckpt = NULL;
+		WT_RET(ret);
+	}
 
 	/*
 	 * Set the file size for the live system.
@@ -800,25 +818,17 @@ __ckpt_update(WT_SESSION_IMPL *session,
 	if (is_live)
 		ci->file_size = block->size;
 
-	/*
-	 * Copy the checkpoint information into the checkpoint array's address
-	 * cookie.
-	 */
-	WT_RET(__wt_buf_init(session, &ckpt->raw, WT_BTREE_MAX_ADDR_COOKIE));
+	/* Copy the COMPLETE checkpoint information into the checkpoint. */
+	WT_RET(__wt_buf_init(session, &ckpt->raw, WT_BLOCK_CHECKPOINT_BUFFER));
 	endp = ckpt->raw.mem;
-	WT_RET(__wt_block_ckpt_to_buffer(session, block, &endp, ci));
+	WT_RET(__wt_block_ckpt_to_buffer(session, block, &endp, ci, false));
 	ckpt->raw.size = WT_PTRDIFF(endp, ckpt->raw.mem);
 
-	if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT)) {
-		WT_RET(__wt_scr_alloc(session, 0, &tmp));
-		WT_ERR(__ckpt_string(session, block, ckpt->raw.data, tmp));
-		__wt_verbose(session, WT_VERB_CHECKPOINT,
-		    "%s: create-checkpoint: %s: %s",
-		    block->name, ckpt->name, (const char *)tmp->data);
-	}
+	if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT))
+		__wt_ckpt_verbose(
+		    session, block, "create", ckpt->name, ckpt->raw.data);
 
-err:	__wt_scr_free(session, &tmp);
-	return (ret);
+	return (0);
 }
 
 /*
@@ -882,64 +892,3 @@ err:	__wt_spin_unlock(session, &block->live_lock);
 
 	return (ret);
 }
-
-/*
- * __ckpt_string --
- *	Return a printable string representation of a checkpoint address cookie.
- */
-static int
-__ckpt_string(WT_SESSION_IMPL *session,
-    WT_BLOCK *block, const uint8_t *addr, WT_ITEM *buf)
-{
-	WT_BLOCK_CKPT *ci, _ci;
-
-	/* Initialize the checkpoint, crack the cookie. */
-	ci = &_ci;
-	WT_RET(__wt_block_ckpt_init(session, ci, "string"));
-	WT_RET(__wt_block_buffer_to_ckpt(session, block, addr, ci));
-
-	WT_RET(__wt_buf_fmt(session, buf,
-	    "version=%" PRIu8, ci->version));
-	if (ci->root_offset == WT_BLOCK_INVALID_OFFSET)
-		WT_RET(__wt_buf_catfmt(session, buf, ", root=[Empty]"));
-	else
-		WT_RET(__wt_buf_catfmt(session, buf,
-		    ", root=[%"
-		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
-		    (uintmax_t)ci->root_offset,
-		    (uintmax_t)(ci->root_offset + ci->root_size),
-		    ci->root_size, ci->root_checksum));
-	if (ci->alloc.offset == WT_BLOCK_INVALID_OFFSET)
-		WT_RET(__wt_buf_catfmt(session, buf, ", alloc=[Empty]"));
-	else
-		WT_RET(__wt_buf_catfmt(session, buf,
-		    ", alloc=[%"
-		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
-		    (uintmax_t)ci->alloc.offset,
-		    (uintmax_t)(ci->alloc.offset + ci->alloc.size),
-		    ci->alloc.size, ci->alloc.checksum));
-	if (ci->avail.offset == WT_BLOCK_INVALID_OFFSET)
-		WT_RET(__wt_buf_catfmt(session, buf, ", avail=[Empty]"));
-	else
-		WT_RET(__wt_buf_catfmt(session, buf,
-		    ", avail=[%"
-		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
-		    (uintmax_t)ci->avail.offset,
-		    (uintmax_t)(ci->avail.offset + ci->avail.size),
-		    ci->avail.size, ci->avail.checksum));
-	if (ci->discard.offset == WT_BLOCK_INVALID_OFFSET)
-		WT_RET(__wt_buf_catfmt(session, buf, ", discard=[Empty]"));
-	else
-		WT_RET(__wt_buf_catfmt(session, buf,
-		    ", discard=[%"
-		    PRIuMAX "-%" PRIuMAX ", %" PRIu32 ", %" PRIu32 "]",
-		    (uintmax_t)ci->discard.offset,
-		    (uintmax_t)(ci->discard.offset + ci->discard.size),
-		    ci->discard.size, ci->discard.checksum));
-	WT_RET(__wt_buf_catfmt(session, buf,
-	    ", file size=%" PRIuMAX, (uintmax_t)ci->file_size));
-
-	__wt_block_ckpt_destroy(session, ci);
-
-	return (0);
-}
diff --git a/src/third_party/wiredtiger/src/block/block_ckpt_scan.c b/src/third_party/wiredtiger/src/block/block_ckpt_scan.c
new file mode 100644
index 00000000000..5db299c399e
--- /dev/null
+++ b/src/third_party/wiredtiger/src/block/block_ckpt_scan.c
@@ -0,0 +1,417 @@
+/*-
+ * Copyright (c) 2014-2019 MongoDB, Inc.
+ * Copyright (c) 2008-2014 WiredTiger, Inc.
+ *	All rights reserved.
+ *
+ * See the file LICENSE for redistribution information.
+ */
+
+#include "wt_internal.h"
+
+/*
+ * It wasn't possible to open standalone files in historic WiredTiger databases,
+ * you're done if you lose the file's associated metadata. That was a mistake
+ * and this code is the workaround. What we need to crack a file is database
+ * metadata plus a list of active checkpoints as of the file's clean shutdown
+ * (normally stored in the database metadata). The last write done in a block
+ * manager's checkpoint is the avail list. If current metadata and checkpoint
+ * information is included in that write, we're close. We can open the file,
+ * read the blocks, scan until we find the avail list, and read the metadata
+ * and checkpoint information from there.
+ *	Two problems remain: first, the checkpoint information isn't correct
+ * until we write the avail list and the checkpoint information has to include
+ * the avail list address plus the final file size after the write. Fortunately,
+ * when scanning the file for the avail lists, we're figuring out exactly the
+ * information needed to fix up the checkpoint information we wrote, that is,
+ * the avail list's offset, size and checksum triplet. As for the final file
+ * size, we allocate all space in the file before we calculate block checksums,
+ * so we can do that space allocation, then fill in the final file size before
+ * calculating the checksum and writing the actual block.
+ *	The second problem is we have to be able to find the avail lists that
+ * include checkpoint information (ignoring previous files created by previous
+ * releases, and, of course, making upgrade/downgrade work seamlessly). Extent
+ * lists are written to their own pages, and we could version this change using
+ * the page header version. Extent lists have WT_PAGE_BLOCK_MANAGER page types,
+ * we could version this change using the upcoming WT_PAGE_VERSION_TS upgrade.
+ * However, that requires waiting a release (we would have to first release a
+ * version that ignores those new page header versions so downgrade works), and
+ * we're not planning a release that writes WT_PAGE_VERSION_TS page headers for
+ * awhile. Happily, historic WiredTiger releases have a bug. Extent lists
+ * consist of a set of offset/size pairs, with magic offset/size pairs at the
+ * beginning and end of the list. Historic releases only verified the offset of
+ * the special pair at the end of the list, ignoring the size. To detect avail
+ * lists that include appended metadata and checkpoint information, this change
+ * adds a version to the extent list: if size is WT_BLOCK_EXTLIST_VERSION_CKPT,
+ * then metadata/checkpoint information follows.
+ */
+
+/*
+ * __wt_block_checkpoint_final --
+ *	Append metadata and checkpoint information to a buffer.
+ */
+int
+__wt_block_checkpoint_final(WT_SESSION_IMPL *session,
+    WT_BLOCK *block, WT_ITEM *buf, uint8_t **file_sizep)
+{
+	WT_CKPT *ckpt;
+	size_t align_size, file_size_offset, len, size;
+	uint8_t *p;
+
+	*file_sizep = 0;
+
+	ckpt = block->final_ckpt;
+	p = (uint8_t *)buf->mem + buf->size;
+
+	/*
+	 * First, add in a counter to uniquely order checkpoints at our level.
+	 * There's order and time information in the checkpoint itself, but the
+	 * order isn't written and the time is only at second granularity.
+	 *	I'm using the Btree write generation for this purpose. That's
+	 * safe and guaranteed correct because everything is locked down for the
+	 * checkpoint, we're the only writer. Plus, because we use the write
+	 * generation as a database connection generation, it's guaranteed to
+	 * move forward and never repeat.
+	 *	It's a layering violation though, this is the only place the
+	 * block manager uses the write generation. The alternative would be to
+	 * add our own write-generation scheme in the block manager, storing a
+	 * value and recovering it when we open the file. We could do that, as
+	 * reading the final avail list when a file is opened is unavoidable,
+	 * so we can retrieve the value written here when we open the file, but
+	 * this approach is simpler.
+	 */
+	size = buf->size + WT_INTPACK64_MAXSIZE;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	WT_RET(__wt_vpack_uint(&p, 0, ++S2BT(session)->write_gen));
+	buf->size = WT_PTRDIFF(p, buf->mem);
+
+	/*
+	 * Second, add space for the final file size as a packed value. We don't
+	 * know how large it will be so skip the maximum required space.
+	 */
+	size = buf->size + WT_INTPACK64_MAXSIZE;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	file_size_offset = buf->size;
+	buf->size = size;
+
+	/* 3a, copy the metadata length into the buffer. */
+	len = strlen(ckpt->block_metadata);
+	size = buf->size + WT_INTPACK64_MAXSIZE;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	WT_RET(__wt_vpack_uint(&p, 0, (uint64_t)len));
+	buf->size = WT_PTRDIFF(p, buf->mem);
+
+	/* 3b, copy the metadata into the buffer. */
+	size = buf->size + len;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	memcpy(p, ckpt->block_metadata, len);
+	buf->size = size;
+
+	/* 4a, copy the checkpoint list length into the buffer. */
+	len = strlen(ckpt->block_checkpoint);
+	size = buf->size + WT_INTPACK64_MAXSIZE;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	WT_RET(__wt_vpack_uint(&p, 0, (uint64_t)len));
+	buf->size = WT_PTRDIFF(p, buf->mem);
+
+	/* 4b, copy the checkpoint list into the buffer. */
+	size = buf->size + len;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	memcpy(p, ckpt->block_checkpoint, len);
+	buf->size = size;
+
+	/*
+	 * 5a, copy the not-quite-right checkpoint information length into the
+	 * buffer.
+	 */
+	len = ckpt->raw.size;
+	size = buf->size + WT_INTPACK64_MAXSIZE;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	WT_RET(__wt_vpack_uint(&p, 0, (uint64_t)len));
+	buf->size = WT_PTRDIFF(p, buf->mem);
+
+	/*
+	 * 5b, copy the not-quite-right checkpoint information into the buffer.
+	 */
+	size = buf->size + len;
+	WT_RET(__wt_buf_extend(session, buf, size));
+	p = (uint8_t *)buf->mem + buf->size;
+	memcpy(p, ckpt->raw.data, len);
+	buf->size = size;
+
+	/*
+	 * We might have grown the buffer beyond the original allocation size,
+	 * make sure that we're still in compliance.
+	 */
+	align_size = WT_ALIGN(buf->size, block->allocsize);
+	if (align_size > buf->memsize)
+		WT_RET(__wt_buf_extend(session, buf, align_size));
+
+	*file_sizep = (uint8_t *)buf->mem + file_size_offset;
+
+	return (0);
+}
+
+struct saved_block_info {
+	uint64_t write_gen;
+	wt_off_t offset;
+	uint32_t size;
+	uint32_t checksum;
+	uint64_t file_size;
+
+	char *metadata;
+	char *checkpoint_list;
+
+	WT_ITEM *checkpoint;
+};
+
+/*
+ * __block_checkpoint_update --
+ *	Update the checkpoint information for the file.
+ */
+static int
+__block_checkpoint_update(
+    WT_SESSION_IMPL *session, WT_BLOCK *block,  struct saved_block_info *info)
+{
+	WT_BLOCK_CKPT ci;
+	WT_ITEM *checkpoint;
+	uint8_t *endp;
+
+	memset(&ci, 0, sizeof(ci));
+	checkpoint = info->checkpoint;
+
+	if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT))
+		__wt_ckpt_verbose(
+		    session, block, "import original", NULL, checkpoint->mem);
+
+	/*
+	 * Convert the final checkpoint data blob to a WT_BLOCK_CKPT structure,
+	 * update it with the avail list information, and convert it back to a
+	 * data blob.
+	 */
+	WT_RET(__wt_block_buffer_to_ckpt(
+	    session, block, checkpoint->data, &ci));
+	ci.avail.offset = info->offset;
+	ci.avail.size = info->size;
+	ci.avail.checksum = info->checksum;
+	ci.file_size = (wt_off_t)info->file_size;
+	WT_RET(__wt_buf_extend(
+	    session, checkpoint, WT_BLOCK_CHECKPOINT_BUFFER));
+	endp = checkpoint->mem;
+	WT_RET(__wt_block_ckpt_to_buffer(session, block, &endp, &ci, false));
+	checkpoint->size = WT_PTRDIFF(endp, checkpoint->mem);
+
+	if (WT_VERBOSE_ISSET(session, WT_VERB_CHECKPOINT))
+		__wt_ckpt_verbose(
+		    session, block, "import replace", NULL, checkpoint->mem);
+
+	return (0);
+}
+
+#define	WT_BLOCK_SKIP(a) do {						\
+	if ((a) != 0)							\
+		continue;						\
+} while (0)
+
+/*
+ * __wt_block_checkpoint_last --
+ *	Scan a file for checkpoints, returning the last one we find.
+ */
+int
+__wt_block_checkpoint_last(WT_SESSION_IMPL *session, WT_BLOCK *block,
+    char **metadatap, char **checkpoint_listp, WT_ITEM *checkpoint)
+{
+	struct saved_block_info *best, _best, *current, _current, *saved_tmp;
+	WT_BLOCK_HEADER *blk;
+	WT_DECL_ITEM(tmp);
+	WT_DECL_RET;
+	WT_FH *fh;
+	const WT_PAGE_HEADER *dsk;
+	wt_off_t ext_off, ext_size, offset;
+	uint64_t len, nblocks, write_gen;
+	uint32_t checksum, size;
+	const uint8_t *p, *t;
+	bool found;
+
+	*metadatap = *checkpoint_listp = NULL;
+	__wt_buf_init(session, checkpoint, WT_BLOCK_CHECKPOINT_BUFFER);
+
+	/*
+	 * Initialize a pair of structures that track the best and current
+	 * checkpoints found so far. This is a little trickier than normal
+	 * because we don't want to start saving a checkpoint only to find
+	 * out it's not one we can use. I doubt that can happen and it
+	 * suggests corruption, but half-a-checkpoint isn't a good place to
+	 * be. Only swap to a new "best" checkpoint if we read the whole
+	 * thing successfully.
+	 *
+	 * Don't re-order these lines: it's done this way so the WT_ITEMs
+	 * are always initialized and error handling works.
+	 */
+	memset((best = &_best), 0, sizeof(_best));
+	memset((current = &_current), 0, sizeof(_current));
+	WT_ERR(__wt_scr_alloc(session, 0, &best->checkpoint));
+	WT_ERR(__wt_scr_alloc(session, 0, &current->checkpoint));
+
+	found = false;
+	ext_off = 0;			/* [-Werror=maybe-uninitialized] */
+	ext_size = 0;
+	len = write_gen = 0;
+
+	WT_ERR(__wt_scr_alloc(session, 64 * 1024, &tmp));
+
+	F_SET(session, WT_SESSION_QUIET_CORRUPT_FILE);
+
+	/*
+	 * Scan the file for pages, using the minimum possible WiredTiger
+	 * allocation size.
+	 */
+	fh = block->fh;
+	for (nblocks = 0, offset = 0; offset < block->size; offset += size) {
+		/* Report progress occasionally. */
+#define	WT_CHECKPOINT_LIST_PROGRESS_INTERVAL	100
+		if (++nblocks % WT_CHECKPOINT_LIST_PROGRESS_INTERVAL == 0)
+			WT_ERR(__wt_progress(session, NULL, nblocks));
+
+		/*
+		 * Read the start of a possible page and get a block length from
+		 * it. Move to the next allocation sized boundary, we'll never
+		 * consider this one again.
+		 */
+		if ((ret = __wt_read(session, fh,
+		    offset, (size_t)WT_BTREE_MIN_ALLOC_SIZE, tmp->mem)) != 0)
+			break;
+		blk = WT_BLOCK_HEADER_REF(tmp->mem);
+		__wt_block_header_byteswap(blk);
+		size = blk->disk_size;
+		checksum = blk->checksum;
+
+		/*
+		 * Check the block size: if it's not insane, read the block.
+		 * Reading the block validates any checksum. The file might
+		 * reasonably have garbage at the end, and we're not here to
+		 * detect that. Ignore problems, subsequent file verification
+		 * can deal with any corruption. If the block isn't valid,
+		 * skip to the next possible block.
+		 */
+		if (__wt_block_offset_invalid(block, offset, size) ||
+		    __wt_block_read_off(
+		    session, block, tmp, offset, size, checksum) != 0) {
+			size = WT_BTREE_MIN_ALLOC_SIZE;
+			continue;
+		}
+
+		dsk = tmp->mem;
+		if (dsk->type != WT_PAGE_BLOCK_MANAGER)
+			continue;
+
+		p = WT_BLOCK_HEADER_BYTE(tmp->mem);
+		WT_BLOCK_SKIP(__wt_extlist_read_pair(&p, &ext_off, &ext_size));
+		if (ext_off != WT_BLOCK_EXTLIST_MAGIC || ext_size != 0)
+			continue;
+		for (;;) {
+			if ((ret = __wt_extlist_read_pair(
+			    &p, &ext_off, &ext_size)) != 0)
+				break;
+			if (ext_off == WT_BLOCK_INVALID_OFFSET)
+				break;
+		}
+		if (ret != 0) {
+			ret = 0;
+			continue;
+		}
+		/*
+		 * Note the less-than check of WT_BLOCK_EXTLIST_VERSION_CKPT,
+		 * that way we can extend this with additional values in the
+		 * future.
+		 */
+		if (ext_size < WT_BLOCK_EXTLIST_VERSION_CKPT)
+			continue;
+
+		/*
+		 * Skip any entries that aren't the most recent we've seen so
+		 * far.
+		 */
+		WT_BLOCK_SKIP(__wt_vunpack_uint(&p, 0, &write_gen));
+		if (write_gen < best->write_gen)
+			continue;
+
+		__wt_verbose(session, WT_VERB_CHECKPOINT,
+		    "scan: checkpoint block at offset %" PRIuMAX
+		    ", generation #%" PRIu64,
+		    (uintmax_t)offset, write_gen);
+
+		current->write_gen = write_gen;
+		current->offset = offset;
+		current->size = size;
+		current->checksum = checksum;
+
+		/*
+		 * The file size is in a fixed-size chunk of data, although it's
+		 * packed (for portability).
+		 */
+		t = p;
+		WT_BLOCK_SKIP(__wt_vunpack_uint(&t, 0, &current->file_size));
+		p += WT_INTPACK64_MAXSIZE;
+
+		/* Save a copy of the metadata. */
+		__wt_free(session, current->metadata);
+		WT_BLOCK_SKIP(__wt_vunpack_uint(&p, 0, &len));
+		WT_ERR(__wt_strndup(session, p, len, &current->metadata));
+		p += len;
+
+		/* Save a copy of the checkpoint list. */
+		__wt_free(session, current->checkpoint_list);
+		WT_BLOCK_SKIP(__wt_vunpack_uint(&p, 0, &len));
+		WT_ERR(__wt_strndup(
+		    session, p, len, &current->checkpoint_list));
+		p += len;
+
+		/* Save a copy of the checkpoint information. */
+		WT_BLOCK_SKIP(__wt_vunpack_uint(&p, 0, &len));
+		WT_ERR(__wt_buf_set(session, current->checkpoint, p, len));
+
+		/* A new winner, swap the "best" and "current" information. */
+		saved_tmp = best;
+		best = current;
+		current = saved_tmp;
+		found = true;
+	}
+
+	if (!found)
+		WT_ERR_MSG(session, WT_NOTFOUND,
+		    "%s: no final checkpoint found in file scan",
+		    block->name);
+
+	/* Correct the checkpoint. */
+	WT_ERR(__block_checkpoint_update(session, block,  best));
+
+	/*
+	 * Copy the information out to our caller. Do the WT_ITEM first, it's
+	 * the only thing left that can fail and simplifies error handling.
+	 */
+	WT_ERR(__wt_buf_set(session,
+	    checkpoint, best->checkpoint->data, best->checkpoint->size));
+	*metadatap = best->metadata;
+	best->metadata = NULL;
+	*checkpoint_listp = best->checkpoint_list;
+	best->checkpoint_list = NULL;
+
+err:
+	__wt_free(session, best->metadata);
+	__wt_free(session, best->checkpoint_list);
+	__wt_scr_free(session, &best->checkpoint);
+	__wt_free(session, current->metadata);
+	__wt_free(session, current->checkpoint_list);
+	__wt_scr_free(session, &current->checkpoint);
+
+	__wt_scr_free(session, &tmp);
+
+	F_CLR(session, WT_SESSION_QUIET_CORRUPT_FILE);
+	return (ret);
+}
diff --git a/src/third_party/wiredtiger/src/block/block_ext.c b/src/third_party/wiredtiger/src/block/block_ext.c
index 003f0489586..82e85658e22 100644
--- a/src/third_party/wiredtiger/src/block/block_ext.c
+++ b/src/third_party/wiredtiger/src/block/block_ext.c
@@ -1186,15 +1186,8 @@ __wt_block_extlist_read(WT_SESSION_IMPL *session,
 	WT_ERR(__wt_block_read_off(
 	    session, block, tmp, el->offset, el->size, el->checksum));
 
-#define	WT_EXTLIST_READ(p, v) do {					\
-	uint64_t _v;							\
-	WT_ERR(__wt_vunpack_uint(&(p), 0, &_v));			\
-	(v) = (wt_off_t)_v;						\
-} while (0)
-
 	p = WT_BLOCK_HEADER_BYTE(tmp->mem);
-	WT_EXTLIST_READ(p, off);
-	WT_EXTLIST_READ(p, size);
+	WT_ERR(__wt_extlist_read_pair(&p, &off, &size));
 	if (off != WT_BLOCK_EXTLIST_MAGIC || size != 0)
 		goto corrupted;
 
@@ -1210,8 +1203,7 @@ __wt_block_extlist_read(WT_SESSION_IMPL *session,
 	 */
 	func = el->track_size == 0 ? __block_append : __block_merge;
 	for (;;) {
-		WT_EXTLIST_READ(p, off);
-		WT_EXTLIST_READ(p, size);
+		WT_ERR(__wt_extlist_read_pair(&p, &off, &size));
 		if (off == WT_BLOCK_INVALID_OFFSET)
 			break;
 
@@ -1263,10 +1255,11 @@ __wt_block_extlist_write(WT_SESSION_IMPL *session,
 
 	/*
 	 * Figure out how many entries we're writing -- if there aren't any
-	 * entries, we're done.
+	 * entries, there's nothing to write, unless we still have to write
+	 * the extent list to include the checkpoint recovery information.
 	 */
 	entries = el->entries + (additional == NULL ? 0 : additional->entries);
-	if (entries == 0) {
+	if (entries == 0 && block->final_ckpt == NULL) {
 		el->offset = WT_BLOCK_INVALID_OFFSET;
 		el->checksum = el->size = 0;
 		return (0);
@@ -1286,25 +1279,21 @@ __wt_block_extlist_write(WT_SESSION_IMPL *session,
 	dsk = tmp->mem;
 	memset(dsk, 0, WT_BLOCK_HEADER_BYTE_SIZE);
 	dsk->type = WT_PAGE_BLOCK_MANAGER;
-
-#define	WT_EXTLIST_WRITE(p, v)						\
-	WT_ERR(__wt_vpack_uint(&(p), 0, (uint64_t)(v)))
+	dsk->version = WT_PAGE_VERSION_TS;
 
 	/* Fill the page's data. */
 	p = WT_BLOCK_HEADER_BYTE(dsk);
-	WT_EXTLIST_WRITE(p, WT_BLOCK_EXTLIST_MAGIC);	/* Initial value */
-	WT_EXTLIST_WRITE(p, 0);
-	WT_EXT_FOREACH(ext, el->off) {			/* Free ranges */
-		WT_EXTLIST_WRITE(p, ext->off);
-		WT_EXTLIST_WRITE(p, ext->size);
-	}
+							/* Extent list starts */
+	WT_ERR(__wt_extlist_write_pair(&p, WT_BLOCK_EXTLIST_MAGIC, 0));
+	WT_EXT_FOREACH(ext, el->off)			/* Free ranges */
+		WT_ERR(__wt_extlist_write_pair(&p, ext->off, ext->size));
 	if (additional != NULL)
-		WT_EXT_FOREACH(ext, additional->off) {	/* Free ranges */
-			WT_EXTLIST_WRITE(p, ext->off);
-			WT_EXTLIST_WRITE(p, ext->size);
-		}
-	WT_EXTLIST_WRITE(p, WT_BLOCK_INVALID_OFFSET);	/* Ending value */
-	WT_EXTLIST_WRITE(p, 0);
+		WT_EXT_FOREACH(ext, additional->off)	/* Free ranges */
+			WT_ERR(
+			    __wt_extlist_write_pair(&p, ext->off, ext->size));
+							/* Extent list stops */
+	WT_ERR(__wt_extlist_write_pair(&p, WT_BLOCK_INVALID_OFFSET,
+	    block->final_ckpt == NULL ? 0 : WT_BLOCK_EXTLIST_VERSION_CKPT));
 
 	dsk->u.datalen = WT_PTRDIFF32(p, WT_BLOCK_HEADER_BYTE(dsk));
 	tmp->size = dsk->mem_size = WT_PTRDIFF32(p, dsk);
diff --git a/src/third_party/wiredtiger/src/block/block_mgr.c b/src/third_party/wiredtiger/src/block/block_mgr.c
index 7211e5cfa24..80662ec6634 100644
--- a/src/third_party/wiredtiger/src/block/block_mgr.c
+++ b/src/third_party/wiredtiger/src/block/block_mgr.c
@@ -69,6 +69,18 @@ __bm_checkpoint(WT_BM *bm, WT_SESSION_IMPL *session,
 }
 
 /*
+ * __bm_checkpoint_last --
+ *	Return information for the last known file checkpoint.
+ */
+static int
+__bm_checkpoint_last(WT_BM *bm, WT_SESSION_IMPL *session,
+    char **metadatap, char **checkpoint_listp, WT_ITEM *checkpoint)
+{
+	return (__wt_block_checkpoint_last(
+	    session, bm->block, metadatap, checkpoint_listp, checkpoint));
+}
+
+/*
  * __bm_checkpoint_readonly --
  *	Write a buffer into a block, creating a checkpoint; readonly version.
  */
@@ -562,6 +574,7 @@ __bm_method_set(WT_BM *bm, bool readonly)
 	bm->addr_string = __bm_addr_string;
 	bm->block_header = __bm_block_header;
 	bm->checkpoint = __bm_checkpoint;
+	bm->checkpoint_last = __bm_checkpoint_last;
 	bm->checkpoint_load = __bm_checkpoint_load;
 	bm->checkpoint_resolve = __bm_checkpoint_resolve;
 	bm->checkpoint_start = __bm_checkpoint_start;
diff --git a/src/third_party/wiredtiger/src/block/block_open.c b/src/third_party/wiredtiger/src/block/block_open.c
index 68f7224ff76..9e4689d7b7e 100644
--- a/src/third_party/wiredtiger/src/block/block_open.c
+++ b/src/third_party/wiredtiger/src/block/block_open.c
@@ -8,7 +8,7 @@
 
 #include "wt_internal.h"
 
-static int __desc_read(WT_SESSION_IMPL *, WT_BLOCK *);
+static int __desc_read(WT_SESSION_IMPL *, uint32_t allocsize, WT_BLOCK *);
 
 /*
  * __wt_block_manager_drop --
@@ -228,7 +228,7 @@ __wt_block_open(WT_SESSION_IMPL *session,
 	 * look at anything, including the description information.
 	 */
 	if (!forced_salvage)
-		WT_ERR(__desc_read(session, block));
+		WT_ERR(__desc_read(session, allocsize, block));
 
 	*blockp = block;
 	__wt_spin_unlock(session, &conn->block_lock);
@@ -314,7 +314,7 @@ __wt_desc_write(WT_SESSION_IMPL *session, WT_FH *fh, uint32_t allocsize)
  *	Read and verify the file's metadata.
  */
 static int
-__desc_read(WT_SESSION_IMPL *session, WT_BLOCK *block)
+__desc_read(WT_SESSION_IMPL *session, uint32_t allocsize, WT_BLOCK *block)
 {
 	WT_BLOCK_DESC *desc;
 	WT_DECL_ITEM(buf);
@@ -326,11 +326,11 @@ __desc_read(WT_SESSION_IMPL *session, WT_BLOCK *block)
 		return (0);
 
 	/* Use a scratch buffer to get correct alignment for direct I/O. */
-	WT_RET(__wt_scr_alloc(session, block->allocsize, &buf));
+	WT_RET(__wt_scr_alloc(session, allocsize, &buf));
 
 	/* Read the first allocation-sized block and verify the file format. */
 	WT_ERR(__wt_read(session,
-	    block->fh, (wt_off_t)0, (size_t)block->allocsize, buf->mem));
+	    block->fh, (wt_off_t)0, (size_t)allocsize, buf->mem));
 
 	/*
 	 * Handle little- and big-endian objects. Objects are written in little-
@@ -342,7 +342,7 @@ __desc_read(WT_SESSION_IMPL *session, WT_BLOCK *block)
 	desc = buf->mem;
 	checksum_tmp = desc->checksum;
 	desc->checksum = 0;
-	checksum_calculate = __wt_checksum(desc, block->allocsize);
+	checksum_calculate = __wt_checksum(desc, allocsize);
 	desc->checksum = checksum_tmp;
 	__wt_block_desc_byteswap(desc);
 
diff --git a/src/third_party/wiredtiger/src/block/block_write.c b/src/third_party/wiredtiger/src/block/block_write.c
index 55f9d4ca57c..b678c148668 100644
--- a/src/third_party/wiredtiger/src/block/block_write.c
+++ b/src/third_party/wiredtiger/src/block/block_write.c
@@ -232,6 +232,7 @@ __block_write_off(WT_SESSION_IMPL *session, WT_BLOCK *block,
 	wt_off_t offset;
 	size_t align_size;
 	uint32_t checksum;
+	uint8_t *file_sizep;
 	bool local_locked;
 
 	*offsetp = 0;			/* -Werror=maybe-uninitialized */
@@ -240,13 +241,6 @@ __block_write_off(WT_SESSION_IMPL *session, WT_BLOCK *block,
 
 	fh = block->fh;
 
-	/*
-	 * Clear the block header to ensure all of it is initialized, even the
-	 * unused fields.
-	 */
-	blk = WT_BLOCK_HEADER_REF(buf->mem);
-	memset(blk, 0, sizeof(*blk));
-
 	/* Buffers should be aligned for writing. */
 	if (!F_ISSET(buf, WT_ITEM_ALIGNED)) {
 		WT_ASSERT(session, F_ISSET(buf, WT_ITEM_ALIGNED));
@@ -255,6 +249,14 @@ __block_write_off(WT_SESSION_IMPL *session, WT_BLOCK *block,
 	}
 
 	/*
+	 * File checkpoint/recovery magic: done before sizing the buffer as it
+	 * may grow the buffer.
+	 */
+	if (block->final_ckpt != NULL)
+		WT_RET(__wt_block_checkpoint_final(
+		    session, block, buf, &file_sizep));
+
+	/*
 	 * Align the size to an allocation unit.
 	 *
 	 * The buffer must be big enough for us to zero to the next allocsize
@@ -273,10 +275,46 @@ __block_write_off(WT_SESSION_IMPL *session, WT_BLOCK *block,
 		    "buffer size check: write buffer too large to write");
 	}
 
+	/* Pre-allocate some number of extension structures. */
+	WT_RET(__wt_block_ext_prealloc(session, 5));
+
+	/*
+	 * Acquire a lock, if we don't already hold one.
+	 * Allocate space for the write, and optionally extend the file (note
+	 * the block-extend function may release the lock).
+	 * Release any locally acquired lock.
+	 */
+	local_locked = false;
+	if (!caller_locked) {
+		__wt_spin_lock(session, &block->live_lock);
+		local_locked = true;
+	}
+	ret = __wt_block_alloc(session, block, &offset, (wt_off_t)align_size);
+	if (ret == 0)
+		ret = __wt_block_extend(
+		    session, block, fh, offset, align_size, &local_locked);
+	if (local_locked)
+		__wt_spin_unlock(session, &block->live_lock);
+	WT_RET(ret);
+
+	/*
+	 * The file has finished changing size. If this is the final write in a
+	 * checkpoint, update the checkpoint's information inline.
+	 */
+	if (block->final_ckpt != NULL)
+		WT_RET(__wt_vpack_uint(&file_sizep, 0, (uint64_t)block->size));
+
 	/* Zero out any unused bytes at the end of the buffer. */
 	memset((uint8_t *)buf->mem + buf->size, 0, align_size - buf->size);
 
 	/*
+	 * Clear the block header to ensure all of it is initialized, even the
+	 * unused fields.
+	 */
+	blk = WT_BLOCK_HEADER_REF(buf->mem);
+	memset(blk, 0, sizeof(*blk));
+
+	/*
 	 * Set the disk size so we don't have to incrementally read blocks
 	 * during salvage.
 	 */
@@ -310,28 +348,6 @@ __block_write_off(WT_SESSION_IMPL *session, WT_BLOCK *block,
 	blk->checksum = __wt_bswap32(blk->checksum);
 #endif
 
-	/* Pre-allocate some number of extension structures. */
-	WT_RET(__wt_block_ext_prealloc(session, 5));
-
-	/*
-	 * Acquire a lock, if we don't already hold one.
-	 * Allocate space for the write, and optionally extend the file (note
-	 * the block-extend function may release the lock).
-	 * Release any locally acquired lock.
-	 */
-	local_locked = false;
-	if (!caller_locked) {
-		__wt_spin_lock(session, &block->live_lock);
-		local_locked = true;
-	}
-	ret = __wt_block_alloc(session, block, &offset, (wt_off_t)align_size);
-	if (ret == 0)
-		ret = __wt_block_extend(
-		    session, block, fh, offset, align_size, &local_locked);
-	if (local_locked)
-		__wt_spin_unlock(session, &block->live_lock);
-	WT_RET(ret);
-
 	/* Write the block. */
 	if ((ret =
 	    __wt_write(session, fh, offset, align_size, buf->mem)) != 0) {
diff --git a/src/third_party/wiredtiger/src/btree/bt_cursor.c b/src/third_party/wiredtiger/src/btree/bt_cursor.c
index e75432f7836..b7176c74adf 100644
--- a/src/third_party/wiredtiger/src/btree/bt_cursor.c
+++ b/src/third_party/wiredtiger/src/btree/bt_cursor.c
@@ -1438,12 +1438,13 @@ __cursor_chain_exceeded(WT_CURSOR_BTREE *cbt)
 	    upd != NULL && upd->type == WT_UPDATE_MODIFY;
 	    ++i, upd = upd->next) {
 		upd_size += WT_UPDATE_MEMSIZE(upd);
-		if (upd_size >= WT_MODIFY_MEM_FACTOR * cursor->value.size)
+		if (i >= WT_MAX_MODIFY_UPDATE &&
+		    upd_size * WT_MODIFY_MEM_FRACTION >= cursor->value.size)
 			return (true);
 	}
-	if (upd != NULL && upd->type == WT_UPDATE_STANDARD &&
-	    __wt_txn_upd_visible_all(session, upd) &&
-	    i >= WT_MAX_MODIFY_UPDATE)
+	if (i >= WT_MAX_MODIFY_UPDATE && upd != NULL &&
+	    upd->type == WT_UPDATE_STANDARD &&
+	    __wt_txn_upd_visible_all(session, upd))
 		return (true);
 	return (false);
 }
diff --git a/src/third_party/wiredtiger/src/btree/bt_handle.c b/src/third_party/wiredtiger/src/btree/bt_handle.c
index f179fa38d91..168a0152f17 100644
--- a/src/third_party/wiredtiger/src/btree/bt_handle.c
+++ b/src/third_party/wiredtiger/src/btree/bt_handle.c
@@ -93,6 +93,7 @@ __wt_btree_open(WT_SESSION_IMPL *session, const char *op_cfg[])
 	WT_CKPT ckpt;
 	WT_CONFIG_ITEM cval;
 	WT_DATA_HANDLE *dhandle;
+	WT_DECL_ITEM(tmp);
 	WT_DECL_RET;
 	size_t root_addr_size;
 	uint8_t root_addr[WT_BTREE_MAX_ADDR_COOKIE];
@@ -239,6 +240,7 @@ err:		WT_TRET(__wt_btree_close(session));
 	}
 	__wt_meta_checkpoint_free(session, &ckpt);
 
+	__wt_scr_free(session, &tmp);
 	return (ret);
 }
 
@@ -324,6 +326,44 @@ __wt_btree_discard(WT_SESSION_IMPL *session)
 }
 
 /*
+ * __wt_btree_config_encryptor --
+ *	Return an encryptor handle based on the configuration.
+ */
+int
+__wt_btree_config_encryptor(WT_SESSION_IMPL *session,
+    const char **cfg, WT_KEYED_ENCRYPTOR **kencryptorp)
+{
+	WT_CONFIG_ITEM cval, enc, keyid;
+	WT_DECL_RET;
+	const char *enc_cfg[] = { NULL, NULL };
+
+	/*
+	 * We do not use __wt_config_gets_none here because "none" and the empty
+	 * string have different meanings. The empty string means inherit the
+	 * system encryption setting and "none" means this table is in the clear
+	 * even if the database is encrypted.
+	 */
+	WT_RET(__wt_config_gets(session, cfg, "encryption.name", &cval));
+	if (cval.len == 0)
+		*kencryptorp = S2C(session)->kencryptor;
+	else if (WT_STRING_MATCH("none", cval.str, cval.len))
+		*kencryptorp = NULL;
+	else {
+		WT_RET(__wt_config_gets_none(
+		    session, cfg, "encryption.keyid", &keyid));
+		WT_RET(__wt_config_gets(session, cfg, "encryption", &enc));
+		if (enc.len != 0)
+			WT_RET(__wt_strndup(session, enc.str, enc.len,
+			    &enc_cfg[0]));
+		ret = __wt_encryptor_config(session, &cval, &keyid,
+		    (WT_CONFIG_ARG *)enc_cfg, kencryptorp);
+		__wt_free(session, enc_cfg[0]);
+		WT_RET(ret);
+	}
+	return (0);
+}
+
+/*
  * __btree_conf --
  *	Configure a WT_BTREE structure.
  */
@@ -331,12 +371,11 @@ static int
 __btree_conf(WT_SESSION_IMPL *session, WT_CKPT *ckpt)
 {
 	WT_BTREE *btree;
-	WT_CONFIG_ITEM cval, enc, keyid, metadata;
+	WT_CONFIG_ITEM cval, metadata;
 	WT_CONNECTION_IMPL *conn;
-	WT_DECL_RET;
 	int64_t maj_version, min_version;
 	uint32_t bitcnt;
-	const char **cfg, *enc_cfg[] = { NULL, NULL };
+	const char **cfg;
 	bool fixed;
 
 	btree = S2BT(session);
@@ -548,29 +587,8 @@ __btree_conf(WT_SESSION_IMPL *session, WT_CKPT *ckpt)
 		}
 	}
 
-	/*
-	 * We do not use __wt_config_gets_none here because "none" and the empty
-	 * string have different meanings. The empty string means inherit the
-	 * system encryption setting and "none" means this table is in the clear
-	 * even if the database is encrypted.
-	 */
-	WT_RET(__wt_config_gets(session, cfg, "encryption.name", &cval));
-	if (cval.len == 0)
-		btree->kencryptor = conn->kencryptor;
-	else if (WT_STRING_MATCH("none", cval.str, cval.len))
-		btree->kencryptor = NULL;
-	else {
-		WT_RET(__wt_config_gets_none(
-		    session, cfg, "encryption.keyid", &keyid));
-		WT_RET(__wt_config_gets(session, cfg, "encryption", &enc));
-		if (enc.len != 0)
-			WT_RET(__wt_strndup(session, enc.str, enc.len,
-			    &enc_cfg[0]));
-		ret = __wt_encryptor_config(session, &cval, &keyid,
-		    (WT_CONFIG_ARG *)enc_cfg, &btree->kencryptor);
-		__wt_free(session, enc_cfg[0]);
-		WT_RET(ret);
-	}
+	/* Configure encryption. */
+	WT_RET(__wt_btree_config_encryptor(session, cfg, &btree->kencryptor));
 
 	/* Initialize locks. */
 	WT_RET(__wt_rwlock_init(session, &btree->ovfl_lock));
diff --git a/src/third_party/wiredtiger/src/btree/bt_import.c b/src/third_party/wiredtiger/src/btree/bt_import.c
new file mode 100644
index 00000000000..69dcda8c1c5
--- /dev/null
+++ b/src/third_party/wiredtiger/src/btree/bt_import.c
@@ -0,0 +1,169 @@
+/*-
+ * Copyright (c) 2014-2019 MongoDB, Inc.
+ * Copyright (c) 2008-2014 WiredTiger, Inc.
+ *	All rights reserved.
+ *
+ * See the file LICENSE for redistribution information.
+ */
+
+#include "wt_internal.h"
+
+/*
+ * __wt_import --
+ *	Import a WiredTiger file into the database.
+ */
+int
+__wt_import(WT_SESSION_IMPL *session, const char *uri)
+{
+	WT_BM *bm;
+	WT_CKPT *ckpt, *ckptbase;
+	WT_CONFIG_ITEM v;
+	WT_DECL_ITEM(a);
+	WT_DECL_ITEM(b);
+	WT_DECL_ITEM(checkpoint);
+	WT_DECL_RET;
+	WT_KEYED_ENCRYPTOR *kencryptor;
+	const char *filename;
+	const char *filecfg[] = {
+	   WT_CONFIG_BASE(session, file_meta), NULL, NULL, NULL, NULL, NULL };
+	char *checkpoint_list, *fileconf, *metadata, fileid[64];
+
+	ckptbase = NULL;
+	checkpoint_list = fileconf = metadata = NULL;
+
+	WT_ERR(__wt_scr_alloc(session, 0, &a));
+	WT_ERR(__wt_scr_alloc(session, 0, &b));
+	WT_ERR(__wt_scr_alloc(session, 0, &checkpoint));
+
+	WT_ASSERT(session, WT_PREFIX_MATCH(uri, "file:"));
+	filename = uri;
+	WT_PREFIX_SKIP(filename, "file:");
+
+	/*
+	 * Open the file, request block manager checkpoint information.
+	 * We don't know the allocation size, but 512B allows us to read
+	 * the descriptor block and that's all we care about.
+	 */
+	WT_ERR(__wt_block_manager_open(
+	    session, filename, filecfg, false, true, 512, &bm));
+	ret = bm->checkpoint_last(
+	    bm, session, &metadata, &checkpoint_list, checkpoint);
+	WT_TRET(bm->close(bm, session));
+	WT_ERR(ret);
+	__wt_verbose(session,
+	    WT_VERB_CHECKPOINT, "import metadata: %s", metadata);
+	__wt_verbose(session,
+	    WT_VERB_CHECKPOINT, "import checkpoint-list: %s", checkpoint_list);
+
+	/*
+	 * The metadata may have been encrypted, in which case it's also
+	 * hexadecimal encoded. The checkpoint included a boolean value
+	 * set if the metadata was encrypted for easier failure diagnosis.
+	 */
+	WT_ERR(__wt_config_getones(
+	    session, metadata, "block_metadata_encrypted", &v));
+	WT_ERR(__wt_btree_config_encryptor(session, filecfg, &kencryptor));
+	if ((kencryptor == NULL && v.val != 0) ||
+	    (kencryptor != NULL && v.val == 0))
+		WT_ERR_MSG(session, EINVAL,
+		    "%s: loaded object's encryption configuration doesn't "
+		    "match the database's encryption configuration",
+		    filename);
+	/*
+	 * The metadata was quoted to avoid configuration string characters
+	 * acting as separators. Discard any quote characters.
+	 */
+	WT_ERR(__wt_config_getones(session, metadata, "block_metadata", &v));
+	if (v.len > 0 && (v.str[0] == '[' || v.str[0] == '(')) {
+		++v.str;
+		v.len -= 2;
+	}
+	if (kencryptor == NULL) {
+		WT_ERR(__wt_buf_grow(session, a, v.len + 1));
+		WT_ERR(__wt_buf_set(session, a, v.str, v.len));
+		((uint8_t *)a->data)[a->size] = '\0';
+	} else {
+		WT_ERR(__wt_buf_grow(session, b, v.len));
+		WT_ERR(__wt_nhex_to_raw(session, v.str, v.len, b));
+		WT_ERR(__wt_buf_grow(session, a, b->size + 1));
+		WT_ERR(__wt_decrypt(session, kencryptor->encryptor, 0, b, a));
+		((uint8_t *)a->data)[a->size] = '\0';
+	}
+
+	/*
+	 * OK, we've now got three chunks of data: the file's metadata from when
+	 * the last checkpoint started, the array of checkpoints as of when the
+	 * last checkpoint was almost complete (everything written but the avail
+	 * list), and fixed-up checkpoint information from the last checkpoint.
+	 *
+	 * Build and flatten the metadata and the checkpoint list, then insert
+	 * it into the metadata for this file.
+	 *
+	 * Strip out the checkpoint-LSN, an imported file isn't associated
+	 * with any log files.
+	 * Assign a unique file ID.
+	 */
+	filecfg[1] = a->data;
+	filecfg[2] = checkpoint_list;
+	filecfg[3] = "checkpoint_lsn=";
+	WT_WITH_SCHEMA_LOCK(session, ret =
+	    __wt_snprintf(fileid, sizeof(fileid),
+	    "id=%" PRIu32, ++S2C(session)->next_file_id));
+	WT_ERR(ret);
+	filecfg[4] = fileid;
+	WT_ERR(__wt_config_collapse(session, filecfg, &fileconf));
+	WT_ERR(__wt_metadata_insert(session, uri, fileconf));
+	__wt_verbose(session,
+	    WT_VERB_CHECKPOINT, "import configuration: %s/%s", uri, fileconf);
+
+	/*
+	 * The just inserted metadata was correct as of immediately before the
+	 * before the final checkpoint, but it's not quite right. The block
+	 * manager returned the corrected final checkpoint, put it all together.
+	 *
+	 * Get the checkpoint information from the file's metadata as an array
+	 * of WT_CKPT structures.
+	 *
+	 * XXX
+	 * There's a problem here. If a file is imported from our future (leaf
+	 * pages with unstable entries that have write-generations ahead of the
+	 * current database's base write generation), we'll read the values and
+	 * treat them as stable. A restart will fix this: when we added the
+	 * imported file to our metadata, the write generation in the imported
+	 * file's checkpoints updated our database's maximum write generation,
+	 * and so a restart will have a maximum generation newer than the
+	 * imported file's write generation. An alternative solution is to add
+	 * a "base write generation" value to the imported file's metadata, and
+	 * use that value instead of the connection's base write generation when
+	 * deciding what page items should be read. Since all future writes to
+	 * the imported file would be ahead of that write generation, it would
+	 * have the effect we want.
+	 *
+	 * Update the last checkpoint with the corrected information.
+	 * Update the file's metadata with the new checkpoint information.
+	 */
+	WT_ERR(__wt_meta_ckptlist_get(session, uri, false, &ckptbase));
+	WT_CKPT_FOREACH(ckptbase, ckpt)
+		if (ckpt->name == NULL || (ckpt + 1)->name == NULL)
+			break;
+	if (ckpt->name == NULL)
+		WT_ERR_MSG(session, EINVAL,
+		    "no checkpoint information available to import");
+	F_SET(ckpt, WT_CKPT_UPDATE);
+	WT_ERR(__wt_buf_set(
+	    session, &ckpt->raw, checkpoint->data, checkpoint->size));
+	WT_ERR(__wt_meta_ckptlist_set(session, uri, ckptbase, NULL));
+
+err:
+	__wt_meta_ckptlist_free(session, &ckptbase);
+
+	__wt_free(session, fileconf);
+	__wt_free(session, metadata);
+	__wt_free(session, checkpoint_list);
+
+	__wt_scr_free(session, &a);
+	__wt_scr_free(session, &b);
+	__wt_scr_free(session, &checkpoint);
+
+	return (ret);
+}
diff --git a/src/third_party/wiredtiger/src/btree/bt_slvg.c b/src/third_party/wiredtiger/src/btree/bt_slvg.c
index d2b0472a11e..3063af2de0a 100644
--- a/src/third_party/wiredtiger/src/btree/bt_slvg.c
+++ b/src/third_party/wiredtiger/src/btree/bt_slvg.c
@@ -157,11 +157,88 @@ static int  __slvg_trk_ovfl(WT_SESSION_IMPL *,
 		const WT_PAGE_HEADER *, uint8_t *, size_t, WT_STUFF *);
 
 /*
- * __wt_bt_salvage --
+ * __slvg_checkpoint --
+ *	Create the post-salvage checkpoint.
+ */
+static int
+__slvg_checkpoint(WT_SESSION_IMPL *session, WT_REF *root)
+{
+	WT_BTREE *btree;
+	WT_CKPT *ckptbase;
+	WT_DATA_HANDLE *dhandle;
+	WT_DECL_RET;
+	char *config;
+
+	btree = S2BT(session);
+	ckptbase = NULL;
+	dhandle = session->dhandle;
+	config = NULL;
+
+	/*
+	 * XXX
+	 * The salvage process reads and discards previous checkpoints, so the
+	 * underlying block manager has to ignore any previous checkpoint
+	 * entries when creating a new checkpoint. In other words, we can't use
+	 * the metadata checkpoint list, it lists the previous checkpoints and
+	 * we don't care about them. Build a clean checkpoint list and use it
+	 * instead.
+	 *
+	 * Don't first clear the metadata checkpoint list and call the function
+	 * to get a list of checkpoints: a crash between clearing the metadata
+	 * checkpoint list and creating a new checkpoint list would look like a
+	 * create or open of a file without a checkpoint to roll-forward from,
+	 * and the contents of the file would be discarded.
+	 */
+	WT_RET(__wt_calloc_def(session, 2, &ckptbase));
+	WT_ERR(__wt_strdup(session, WT_CHECKPOINT, &ckptbase->name));
+	ckptbase->order = 1;
+	__wt_seconds(session, &ckptbase->sec);
+	WT_ERR(__wt_metadata_search(session, dhandle->name, &config));
+	WT_ERR(__wt_meta_block_metadata(session, config, ckptbase));
+	ckptbase->newest_durable_ts = WT_TS_NONE;
+	ckptbase->oldest_start_ts = WT_TS_NONE;
+	ckptbase->oldest_start_txn = WT_TXN_NONE;
+	ckptbase->newest_stop_ts = WT_TS_MAX;
+	ckptbase->newest_stop_txn = WT_TXN_MAX;
+	F_SET(ckptbase, WT_CKPT_ADD);
+
+	/*
+	 * We may not have found any pages during salvage and there's no tree
+	 * to flush.
+	 */
+	if (root->page != NULL) {
+		btree->ckpt = ckptbase;
+		ret = __wt_evict(
+		    session, root, WT_REF_MEM, WT_EVICT_CALL_CLOSING);
+		root->page = NULL;
+		btree->ckpt = NULL;
+		WT_ERR(ret);
+	}
+
+	/*
+	 * If no checkpoint was created, clear all recorded checkpoints for the
+	 * file. This is expected if we didn't find any leaf pages to salvage.
+	 *
+	 * If a checkpoint was created, life is good, replace any existing list
+	 * of checkpoints with the single new one.
+	 */
+	if (ckptbase->raw.data == NULL)
+		WT_TRET(__wt_meta_checkpoint_clear(session, dhandle->name));
+	else
+		WT_ERR(__wt_meta_ckptlist_set(
+		    session, dhandle->name, ckptbase, NULL));
+
+err:	__wt_meta_ckptlist_free(session, &ckptbase);
+	__wt_free(session, config);
+	return (ret);
+}
+
+/*
+ * __wt_salvage --
  *	Salvage a Btree.
  */
 int
-__wt_bt_salvage(WT_SESSION_IMPL *session, WT_CKPT *ckptbase, const char *cfg[])
+__wt_salvage(WT_SESSION_IMPL *session, const char *cfg[])
 {
 	WT_BM *bm;
 	WT_BTREE *btree;
@@ -324,15 +401,9 @@ __wt_bt_salvage(WT_SESSION_IMPL *session, WT_CKPT *ckptbase, const char *cfg[])
 
 	/*
 	 * Step 9:
-	 * Evict the newly created root page, creating a checkpoint.
+	 * Evict any newly created root page, creating a checkpoint.
 	 */
-	if (ss->root_ref.page != NULL) {
-		btree->ckpt = ckptbase;
-		ret = __wt_evict(session, &ss->root_ref, WT_REF_MEM,
-		    WT_EVICT_CALL_CLOSING);
-		ss->root_ref.page = NULL;
-		btree->ckpt = NULL;
-	}
+	WT_ERR(__slvg_checkpoint(session, &ss->root_ref));
 
 	/*
 	 * Step 10:
diff --git a/src/third_party/wiredtiger/src/btree/bt_split.c b/src/third_party/wiredtiger/src/btree/bt_split.c
index b1d8dce75a5..8bd58c17975 100644
--- a/src/third_party/wiredtiger/src/btree/bt_split.c
+++ b/src/third_party/wiredtiger/src/btree/bt_split.c
@@ -1412,6 +1412,25 @@ err:	if (parent != NULL)
 	return (0);
 }
 
+#ifdef HAVE_DIAGNOSTIC
+/*
+ * __check_upd_list --
+ *	Sanity check an update list.
+ *	In particular, make sure there no birthmarks.
+ */
+static void
+__check_upd_list(WT_SESSION_IMPL *session, WT_UPDATE *upd)
+{
+	int birthmark_count;
+
+	for (birthmark_count = 0; upd != NULL; upd = upd->next)
+		if (upd->type == WT_UPDATE_BIRTHMARK)
+			++birthmark_count;
+
+	WT_ASSERT(session, birthmark_count <= 1);
+}
+#endif
+
 /*
  * __split_multi_inmem --
  *	Instantiate a page from a disk image.
@@ -1511,6 +1530,10 @@ __split_multi_inmem(
 				key->size = WT_INSERT_KEY_SIZE(supd->ins);
 			}
 
+#ifdef HAVE_DIAGNOSTIC
+			__check_upd_list(session, upd);
+#endif
+
 			/* Search the page. */
 			WT_ERR(__wt_row_search(
 			    session, key, ref, &cbt, true, true));
@@ -1817,9 +1840,11 @@ __split_insert(WT_SESSION_IMPL *session, WT_REF *ref)
 		    WT_SKIP_FIRST(WT_ROW_INSERT_SMALLEST(page))) != NULL) {
 			key->data = WT_INSERT_KEY(ins);
 			key->size = WT_INSERT_KEY_SIZE(ins);
-		} else
+		} else {
+			WT_ASSERT(session, page->entries > 0);
 			WT_ERR(__wt_row_leaf_key(
 			    session, page, &page->pg_row[0], key, true));
+		}
 		WT_ERR(__wt_row_ikey(session, 0, key->data, key->size, child));
 		parent_incr += sizeof(WT_IKEY) + key->size;
 		__wt_scr_free(session, &key);
diff --git a/src/third_party/wiredtiger/src/btree/bt_vrfy.c b/src/third_party/wiredtiger/src/btree/bt_vrfy.c
index 9078e74674b..6a07ba5aa55 100644
--- a/src/third_party/wiredtiger/src/btree/bt_vrfy.c
+++ b/src/third_party/wiredtiger/src/btree/bt_vrfy.c
@@ -162,11 +162,13 @@ __wt_verify(WT_SESSION_IMPL *session, const char *cfg[])
 	WT_VSTUFF *vs, _vstuff;
 	size_t root_addr_size;
 	uint8_t root_addr[WT_BTREE_MAX_ADDR_COOKIE];
+	const char *name;
 	bool bm_start, quit;
 
 	btree = S2BT(session);
 	bm = btree->bm;
 	ckptbase = NULL;
+	name = session->dhandle->name;
 	bm_start = false;
 
 	WT_CLEAR(_vstuff);
@@ -186,9 +188,16 @@ __wt_verify(WT_SESSION_IMPL *session, const char *cfg[])
 	if (quit)
 		goto done;
 
-	/* Get a list of the checkpoints for this file. */
-	WT_ERR(
-	    __wt_meta_ckptlist_get(session, btree->dhandle->name, &ckptbase));
+	/*
+	 * Get a list of the checkpoints for this file. Empty objects have no
+	 * checkpoints, in which case there's no work to do.
+	 */
+	ret = __wt_meta_ckptlist_get(session, name, false, &ckptbase);
+	if (ret == WT_NOTFOUND) {
+		ret = 0;
+		goto done;
+	}
+	WT_ERR(ret);
 
 	/* Inform the underlying block manager we're verifying. */
 	WT_ERR(bm->verify_start(bm, session, ckptbase, cfg));
@@ -197,7 +206,7 @@ __wt_verify(WT_SESSION_IMPL *session, const char *cfg[])
 	/* Loop through the file's checkpoints, verifying each one. */
 	WT_CKPT_FOREACH(ckptbase, ckpt) {
 		__wt_verbose(session, WT_VERB_VERIFY,
-		    "%s: checkpoint %s", btree->dhandle->name, ckpt->name);
+		    "%s: checkpoint %s", name, ckpt->name);
 
 		/* Fake checkpoints require no work. */
 		if (F_ISSET(ckpt, WT_CKPT_FAKE))
@@ -209,7 +218,7 @@ __wt_verify(WT_SESSION_IMPL *session, const char *cfg[])
 		if (WT_VRFY_DUMP(vs)) {
 			WT_ERR(__wt_msg(session, "%s", WT_DIVIDER));
 			WT_ERR(__wt_msg(session, "%s: checkpoint %s",
-			    btree->dhandle->name, ckpt->name));
+			    name, ckpt->name));
 		}
 
 		/* Load the checkpoint. */
diff --git a/src/third_party/wiredtiger/src/cache/cache_las.c b/src/third_party/wiredtiger/src/cache/cache_las.c
index 87d55c1ac5e..d743f4f2eeb 100644
--- a/src/third_party/wiredtiger/src/cache/cache_las.c
+++ b/src/third_party/wiredtiger/src/cache/cache_las.c
@@ -660,7 +660,7 @@ __wt_las_insert_block(WT_CURSOR *cursor,
 	WT_SAVE_UPD *list;
 	WT_SESSION_IMPL *session;
 	WT_TXN_ISOLATION saved_isolation;
-	WT_UPDATE *upd;
+	WT_UPDATE *first_upd, *upd;
 	wt_off_t las_size;
 	uint64_t insert_cnt, las_counter, las_pageid, max_las_size;
 	uint64_t prepared_insert_cnt;
@@ -741,7 +741,7 @@ __wt_las_insert_block(WT_CURSOR *cursor,
 			slot = page->type == WT_PAGE_ROW_LEAF ?
 			    WT_ROW_SLOT(page, list->ripcip) :
 			    WT_COL_SLOT(page, list->ripcip);
-		upd = list->ins == NULL ?
+		first_upd = upd = list->ins == NULL ?
 		    page->modify->mod_row_update[slot] : list->ins->upd;
 
 		/*
@@ -760,6 +760,9 @@ __wt_las_insert_block(WT_CURSOR *cursor,
 				las_value.size = upd->size;
 				break;
 			case WT_UPDATE_BIRTHMARK:
+				WT_ASSERT(session, upd != first_upd ||
+				    multi->page_las.skew_newest);
+				/* FALLTHROUGH */
 			case WT_UPDATE_TOMBSTONE:
 				las_value.size = 0;
 				break;
@@ -780,6 +783,8 @@ __wt_las_insert_block(WT_CURSOR *cursor,
 			    (upd->type == WT_UPDATE_STANDARD ||
 			    upd->type == WT_UPDATE_MODIFY)) {
 				las_value.size = 0;
+				WT_ASSERT(session, upd != first_upd ||
+				    multi->page_las.skew_newest);
 				cursor->set_value(cursor, upd->txnid,
 				    upd->start_ts, upd->durable_ts,
 				    upd->prepare_state, WT_UPDATE_BIRTHMARK,
@@ -835,6 +840,7 @@ err:	/* Resolve the transaction. */
 		__las_insert_block_verbose(session, btree, multi);
 	}
 
+	WT_UNUSED(first_upd);
 	return (ret);
 }
 
diff --git a/src/third_party/wiredtiger/src/config/config_collapse.c b/src/third_party/wiredtiger/src/config/config_collapse.c
index 0c4dfe7c604..3c21e0e224f 100644
--- a/src/third_party/wiredtiger/src/config/config_collapse.c
+++ b/src/third_party/wiredtiger/src/config/config_collapse.c
@@ -82,6 +82,103 @@ err:	__wt_scr_free(session, &tmp);
 }
 
 /*
+ * __wt_config_discard_defaults --
+ *	Copy non-default configuration strings into newly allocated memory.
+ *
+ * This function strips out entries from a configuration string that aren't the
+ * default values. It takes a NULL-terminated list of configuration strings, the
+ * defaults, and a configuration string, and copies into allocated memory the
+ * strings from the configuration string that aren't the same as the defaults.
+ */
+int
+__wt_config_discard_defaults(WT_SESSION_IMPL *session,
+    const char **cfg, const char *config, char **config_ret)
+{
+	WT_CONFIG cparser;
+	WT_CONFIG_ITEM k, v, vtmp;
+	WT_DECL_ITEM(tmp);
+	WT_DECL_RET;
+
+	*config_ret = NULL;
+
+	WT_RET(__wt_scr_alloc(session, 0, &tmp));
+
+	/*
+	 * Walk the configuration string, search the default configuration for
+	 * each entry, and discard any matches.
+	 */
+	__wt_config_init(session, &cparser, config);
+	while ((ret = __wt_config_next(&cparser, &k, &v)) == 0) {
+		if (k.type != WT_CONFIG_ITEM_STRING &&
+		    k.type != WT_CONFIG_ITEM_ID)
+			WT_ERR_MSG(session, EINVAL,
+			    "Invalid configuration key found: '%s'", k.str);
+
+		/*
+		 * Get the default value. There isn't a default value in some
+		 * cases, so not finding one isn't an error.
+		 */
+		if ((ret =
+		    __wt_config_get(session, cfg, &k, &vtmp)) == WT_NOTFOUND)
+			goto keep;
+		WT_ERR(ret);
+
+		/*
+		 * Skip exact matches and simple things we can catch like "none"
+		 * and an empty string, "true" and 1, "false" and 0.
+		 */
+		if (v.type == WT_CONFIG_ITEM_STRUCT &&
+		    vtmp.type == WT_CONFIG_ITEM_STRUCT &&
+		    v.len == vtmp.len && memcmp(v.str, vtmp.str, v.len) == 0)
+			continue;
+		if ((v.type == WT_CONFIG_ITEM_BOOL ||
+		    v.type == WT_CONFIG_ITEM_NUM) &&
+		    (vtmp.type == WT_CONFIG_ITEM_BOOL ||
+		    vtmp.type == WT_CONFIG_ITEM_NUM) && v.val == vtmp.val)
+			continue;
+		if ((v.type == WT_CONFIG_ITEM_ID ||
+		    v.type == WT_CONFIG_ITEM_STRING) &&
+		    (vtmp.type == WT_CONFIG_ITEM_ID ||
+		    vtmp.type == WT_CONFIG_ITEM_STRING) &&
+		    v.len == vtmp.len && memcmp(v.str, vtmp.str, v.len) == 0)
+			continue;
+		if (vtmp.len == 0 && v.len == strlen("none") &&
+		    WT_STRING_MATCH("none", v.str, v.len))
+			continue;
+
+		/* Include the quotes around string keys/values. */
+keep:		if (k.type == WT_CONFIG_ITEM_STRING) {
+			--k.str;
+			k.len += 2;
+		}
+		if (v.type == WT_CONFIG_ITEM_STRING) {
+			--v.str;
+			v.len += 2;
+		}
+		WT_ERR(__wt_buf_catfmt(session, tmp, "%.*s=%.*s,",
+		    (int)k.len, k.str, (int)v.len, v.str));
+	}
+
+	/* We loop until error, and the expected error is WT_NOTFOUND. */
+	if (ret != WT_NOTFOUND)
+		goto err;
+
+	/*
+	 * If the caller passes us only default configuration strings, we get
+	 * here with no bytes to copy -- that's OK, the underlying string copy
+	 * can handle empty strings.
+	 *
+	 * Strip any trailing comma.
+	 */
+	if (tmp->size != 0)
+		--tmp->size;
+	ret = __wt_strndup(session, tmp->data, tmp->size, config_ret);
+
+err:	__wt_scr_free(session, &tmp);
+	return (ret);
+}
+
+/*
  * We need a character that can't appear in a key as a separator.
  */
 #undef	SEP					/* separator key, character */
diff --git a/src/third_party/wiredtiger/src/config/config_def.c b/src/third_party/wiredtiger/src/config/config_def.c
index 11b41b07787..a8152f08d16 100644
--- a/src/third_party/wiredtiger/src/config/config_def.c
+++ b/src/third_party/wiredtiger/src/config/config_def.c
@@ -84,6 +84,7 @@ static const WT_CONFIG_CHECK
 	{ "checkpoint_retention", "int",
 	    NULL, "min=0,max=1024",
 	    NULL, 0 },
+	{ "eviction", "boolean", NULL, NULL, NULL, 0 },
 	{ "rollback_error", "int", NULL, "min=0,max=10M", NULL, 0 },
 	{ "table_logging", "boolean", NULL, NULL, NULL, 0 },
 	{ NULL, NULL, NULL, NULL, NULL, 0 }
@@ -177,7 +178,7 @@ static const WT_CONFIG_CHECK confchk_WT_CONNECTION_reconfigure[] = {
 	    confchk_WT_CONNECTION_reconfigure_compatibility_subconfigs, 1 },
 	{ "debug_mode", "category",
 	    NULL, NULL,
-	    confchk_wiredtiger_open_debug_mode_subconfigs, 3 },
+	    confchk_wiredtiger_open_debug_mode_subconfigs, 4 },
 	{ "error_prefix", "string", NULL, NULL, NULL, 0 },
 	{ "eviction", "category",
 	    NULL, NULL,
@@ -894,7 +895,7 @@ static const WT_CONFIG_CHECK confchk_wiredtiger_open[] = {
 	{ "create", "boolean", NULL, NULL, NULL, 0 },
 	{ "debug_mode", "category",
 	    NULL, NULL,
-	    confchk_wiredtiger_open_debug_mode_subconfigs, 3 },
+	    confchk_wiredtiger_open_debug_mode_subconfigs, 4 },
 	{ "direct_io", "list",
 	    NULL, "choices=[\"checkpoint\",\"data\",\"log\"]",
 	    NULL, 0 },
@@ -1009,7 +1010,7 @@ static const WT_CONFIG_CHECK confchk_wiredtiger_open_all[] = {
 	{ "create", "boolean", NULL, NULL, NULL, 0 },
 	{ "debug_mode", "category",
 	    NULL, NULL,
-	    confchk_wiredtiger_open_debug_mode_subconfigs, 3 },
+	    confchk_wiredtiger_open_debug_mode_subconfigs, 4 },
 	{ "direct_io", "list",
 	    NULL, "choices=[\"checkpoint\",\"data\",\"log\"]",
 	    NULL, 0 },
@@ -1123,7 +1124,7 @@ static const WT_CONFIG_CHECK confchk_wiredtiger_open_basecfg[] = {
 	    confchk_wiredtiger_open_compatibility_subconfigs, 3 },
 	{ "debug_mode", "category",
 	    NULL, NULL,
-	    confchk_wiredtiger_open_debug_mode_subconfigs, 3 },
+	    confchk_wiredtiger_open_debug_mode_subconfigs, 4 },
 	{ "direct_io", "list",
 	    NULL, "choices=[\"checkpoint\",\"data\",\"log\"]",
 	    NULL, 0 },
@@ -1233,7 +1234,7 @@ static const WT_CONFIG_CHECK confchk_wiredtiger_open_usercfg[] = {
 	    confchk_wiredtiger_open_compatibility_subconfigs, 3 },
 	{ "debug_mode", "category",
 	    NULL, NULL,
-	    confchk_wiredtiger_open_debug_mode_subconfigs, 3 },
+	    confchk_wiredtiger_open_debug_mode_subconfigs, 4 },
 	{ "direct_io", "list",
 	    NULL, "choices=[\"checkpoint\",\"data\",\"log\"]",
 	    NULL, 0 },
@@ -1372,12 +1373,12 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  "async=(enabled=false,ops_max=1024,threads=2),cache_max_wait_ms=0"
 	  ",cache_overflow=(file_max=0),cache_overhead=8,cache_size=100MB,"
 	  "checkpoint=(log_size=0,wait=0),compatibility=(release=),"
-	  "debug_mode=(checkpoint_retention=0,rollback_error=0,"
-	  "table_logging=false),error_prefix=,eviction=(threads_max=8,"
-	  "threads_min=1),eviction_checkpoint_target=1,"
-	  "eviction_dirty_target=5,eviction_dirty_trigger=20,"
-	  "eviction_target=80,eviction_trigger=95,"
-	  "file_manager=(close_handle_minimum=250,close_idle_time=30,"
+	  "debug_mode=(checkpoint_retention=0,eviction=false,"
+	  "rollback_error=0,table_logging=false),error_prefix=,"
+	  "eviction=(threads_max=8,threads_min=1),"
+	  "eviction_checkpoint_target=1,eviction_dirty_target=5,"
+	  "eviction_dirty_trigger=20,eviction_target=80,eviction_trigger=95"
+	  ",file_manager=(close_handle_minimum=250,close_idle_time=30,"
 	  "close_scan_interval=10),io_capacity=(total=0),log=(archive=true,"
 	  "os_cache_dirty_pct=0,prealloc=true,zero_fill=false),"
 	  "lsm_manager=(merge=true,worker_thread_max=4),lsm_merge=true,"
@@ -1465,6 +1466,10 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  "remove_files=true",
 	  confchk_WT_SESSION_drop, 4
 	},
+	{ "WT_SESSION.import",
+	  "",
+	  NULL, 0
+	},
 	{ "WT_SESSION.join",
 	  "bloom_bit_count=16,bloom_false_positives=false,"
 	  "bloom_hash_count=8,compare=\"eq\",count=,operation=\"and\","
@@ -1627,10 +1632,11 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  ",cache_size=100MB,checkpoint=(log_size=0,wait=0),"
 	  "checkpoint_sync=true,compatibility=(release=,require_max=,"
 	  "require_min=),config_base=true,create=false,"
-	  "debug_mode=(checkpoint_retention=0,rollback_error=0,"
-	  "table_logging=false),direct_io=,encryption=(keyid=,name=,"
-	  "secretkey=),error_prefix=,eviction=(threads_max=8,threads_min=1)"
-	  ",eviction_checkpoint_target=1,eviction_dirty_target=5,"
+	  "debug_mode=(checkpoint_retention=0,eviction=false,"
+	  "rollback_error=0,table_logging=false),direct_io=,"
+	  "encryption=(keyid=,name=,secretkey=),error_prefix=,"
+	  "eviction=(threads_max=8,threads_min=1),"
+	  "eviction_checkpoint_target=1,eviction_dirty_target=5,"
 	  "eviction_dirty_trigger=20,eviction_target=80,eviction_trigger=95"
 	  ",exclusive=false,extensions=,file_extend=,"
 	  "file_manager=(close_handle_minimum=250,close_idle_time=30,"
@@ -1657,10 +1663,11 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  ",cache_size=100MB,checkpoint=(log_size=0,wait=0),"
 	  "checkpoint_sync=true,compatibility=(release=,require_max=,"
 	  "require_min=),config_base=true,create=false,"
-	  "debug_mode=(checkpoint_retention=0,rollback_error=0,"
-	  "table_logging=false),direct_io=,encryption=(keyid=,name=,"
-	  "secretkey=),error_prefix=,eviction=(threads_max=8,threads_min=1)"
-	  ",eviction_checkpoint_target=1,eviction_dirty_target=5,"
+	  "debug_mode=(checkpoint_retention=0,eviction=false,"
+	  "rollback_error=0,table_logging=false),direct_io=,"
+	  "encryption=(keyid=,name=,secretkey=),error_prefix=,"
+	  "eviction=(threads_max=8,threads_min=1),"
+	  "eviction_checkpoint_target=1,eviction_dirty_target=5,"
 	  "eviction_dirty_trigger=20,eviction_target=80,eviction_trigger=95"
 	  ",exclusive=false,extensions=,file_extend=,"
 	  "file_manager=(close_handle_minimum=250,close_idle_time=30,"
@@ -1686,7 +1693,7 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  "cache_max_wait_ms=0,cache_overflow=(file_max=0),cache_overhead=8"
 	  ",cache_size=100MB,checkpoint=(log_size=0,wait=0),"
 	  "checkpoint_sync=true,compatibility=(release=,require_max=,"
-	  "require_min=),debug_mode=(checkpoint_retention=0,"
+	  "require_min=),debug_mode=(checkpoint_retention=0,eviction=false,"
 	  "rollback_error=0,table_logging=false),direct_io=,"
 	  "encryption=(keyid=,name=,secretkey=),error_prefix=,"
 	  "eviction=(threads_max=8,threads_min=1),"
@@ -1714,7 +1721,7 @@ static const WT_CONFIG_ENTRY config_entries[] = {
 	  "cache_max_wait_ms=0,cache_overflow=(file_max=0),cache_overhead=8"
 	  ",cache_size=100MB,checkpoint=(log_size=0,wait=0),"
 	  "checkpoint_sync=true,compatibility=(release=,require_max=,"
-	  "require_min=),debug_mode=(checkpoint_retention=0,"
+	  "require_min=),debug_mode=(checkpoint_retention=0,eviction=false,"
 	  "rollback_error=0,table_logging=false),direct_io=,"
 	  "encryption=(keyid=,name=,secretkey=),error_prefix=,"
 	  "eviction=(threads_max=8,threads_min=1),"
diff --git a/src/third_party/wiredtiger/src/conn/api_calc_modify.c b/src/third_party/wiredtiger/src/conn/api_calc_modify.c
index 4a435a85ef1..a8091498ee6 100644
--- a/src/third_party/wiredtiger/src/conn/api_calc_modify.c
+++ b/src/third_party/wiredtiger/src/conn/api_calc_modify.c
@@ -69,16 +69,31 @@ static void
 __cm_extend(WT_CM_STATE *cms,
     const uint8_t *m1, const uint8_t *m2, WT_CM_MATCH *match)
 {
+	ptrdiff_t n;
 	const uint8_t *p1, *p2;
 
-	/* Step past the end and before the beginning of the matching block. */
+	p1 = m1;
+	p2 = m2;
+
+	/*
+	 * Keep skipping half of the remaining bytes while they compare equal.
+	 * This is significantly faster than our byte-at-a-time loop below.
+	 */
 	for (p1 = m1, p2 = m2;
-	    p1 < cms->e1 && p2 < cms->e2 && *p1 == *p2;
-	    p1++, p2++)
+	    (n = WT_MIN(cms->e1 - p1, cms->e2 - p2) / 2) > 8 &&
+	    memcmp(p1, p2, (size_t)n) == 0;
+	    p1 += n, p2 += n)
+		;
+
+	/* Step past the end and before the beginning of the matching block. */
+	for (n = WT_MIN(cms->e1 - p1, cms->e2 - p2);
+	    n > 0 && *p1 == *p2;
+	    n--, p1++, p2++)
 		;
 
-	for (; m1 >= cms->used1 && m2 >= cms->used2 && *m1 == *m2;
-	    m1--, m2--)
+	for (n = WT_MIN(m1 - cms->used1, m2 - cms->used2);
+	    n > 0 && *m1 == *m2;
+	    n--, m1--, m2--)
 		;
 
 	match->m1 = m1 + 1;
diff --git a/src/third_party/wiredtiger/src/conn/conn_api.c b/src/third_party/wiredtiger/src/conn/conn_api.c
index 7a854ee596f..e68fb6c15f8 100644
--- a/src/third_party/wiredtiger/src/conn/conn_api.c
+++ b/src/third_party/wiredtiger/src/conn/conn_api.c
@@ -1830,25 +1830,16 @@ err:	/*
 int
 __wt_debug_mode_config(WT_SESSION_IMPL *session, const char *cfg[])
 {
+	WT_CACHE *cache;
 	WT_CONFIG_ITEM cval;
 	WT_CONNECTION_IMPL *conn;
 	WT_TXN_GLOBAL *txn_global;
 
 	conn = S2C(session);
+	cache = conn->cache;
 	txn_global = &conn->txn_global;
 
 	WT_RET(__wt_config_gets(session,
-	    cfg, "debug_mode.rollback_error", &cval));
-	txn_global->debug_rollback = (uint64_t)cval.val;
-
-	WT_RET(__wt_config_gets(session,
-	    cfg, "debug_mode.table_logging", &cval));
-	if (cval.val)
-		FLD_SET(conn->log_flags, WT_CONN_LOG_DEBUG_MODE);
-	else
-		FLD_CLR(conn->log_flags, WT_CONN_LOG_DEBUG_MODE);
-
-	WT_RET(__wt_config_gets(session,
 	    cfg, "debug_mode.checkpoint_retention", &cval));
 	conn->debug_ckpt_cnt = (uint32_t)cval.val;
 	if (cval.val == 0) {
@@ -1862,6 +1853,24 @@ __wt_debug_mode_config(WT_SESSION_IMPL *session, const char *cfg[])
 		WT_RET(__wt_calloc_def(session,
 		    conn->debug_ckpt_cnt, &conn->debug_ckpt));
 
+	WT_RET(__wt_config_gets(session,
+	    cfg, "debug_mode.eviction", &cval));
+	if (cval.val)
+		F_SET(cache, WT_CACHE_EVICT_DEBUG_MODE);
+	else
+		F_CLR(cache, WT_CACHE_EVICT_DEBUG_MODE);
+
+	WT_RET(__wt_config_gets(session,
+	    cfg, "debug_mode.rollback_error", &cval));
+	txn_global->debug_rollback = (uint64_t)cval.val;
+
+	WT_RET(__wt_config_gets(session,
+	    cfg, "debug_mode.table_logging", &cval));
+	if (cval.val)
+		FLD_SET(conn->log_flags, WT_CONN_LOG_DEBUG_MODE);
+	else
+		FLD_CLR(conn->log_flags, WT_CONN_LOG_DEBUG_MODE);
+
 	return (0);
 }
 
@@ -2637,7 +2646,6 @@ wiredtiger_open(const char *home, WT_EVENT_HANDLER *event_handler,
 		    session, cval.str, cval.len, &conn->error_prefix));
 	}
 	WT_ERR(__wt_verbose_config(session, cfg));
-	WT_ERR(__wt_debug_mode_config(session, cfg));
 	WT_ERR(__wt_timing_stress_config(session, cfg));
 	__wt_btree_page_version_config(session);
 
@@ -2762,6 +2770,12 @@ wiredtiger_open(const char *home, WT_EVENT_HANDLER *event_handler,
 	session = conn->default_session;
 
 	/*
+	 * This function expects the cache to be created so parse this after
+	 * the rest of the connection is set up.
+	 */
+	WT_ERR(__wt_debug_mode_config(session, cfg));
+
+	/*
 	 * Load the extensions after initialization completes; extensions expect
 	 * everything else to be in place, and the extensions call back into the
 	 * library.
diff --git a/src/third_party/wiredtiger/src/docs/command-line.dox b/src/third_party/wiredtiger/src/docs/command-line.dox
index df52324f8f8..852e07dd70a 100644
--- a/src/third_party/wiredtiger/src/docs/command-line.dox
+++ b/src/third_party/wiredtiger/src/docs/command-line.dox
@@ -342,7 +342,7 @@ data that cannot be recovered.  Underlying files are re-written in place,
 overwriting the original file contents.
 
 @subsection util_salvage_synopsis Synopsis
-<code>wt [-RVv] [-C config] [-E secretkey ] [-h directory] salvage [-F force] uri</code>
+<code>wt [-RVv] [-C config] [-E secretkey ] [-h directory] salvage [-F] uri</code>
 
 @subsection util_salvage_options Options
 The following are command-specific options for the \c salvage command:
diff --git a/src/third_party/wiredtiger/src/evict/evict_lru.c b/src/third_party/wiredtiger/src/evict/evict_lru.c
index 7d696a20831..ff2840b722c 100644
--- a/src/third_party/wiredtiger/src/evict/evict_lru.c
+++ b/src/third_party/wiredtiger/src/evict/evict_lru.c
@@ -107,6 +107,25 @@ __evict_entry_priority(WT_SESSION_IMPL *session, WT_REF *ref)
 }
 
 /*
+ * __evict_lru_cmp_debug --
+ *	Qsort function: sort the eviction array.
+ *	Version for eviction debug mode.
+ */
+static int WT_CDECL
+__evict_lru_cmp_debug(const void *a_arg, const void *b_arg)
+{
+	const WT_EVICT_ENTRY *a, *b;
+	uint64_t a_score, b_score;
+
+	a = a_arg;
+	b = b_arg;
+	a_score = (a->ref == NULL ? UINT64_MAX : 0);
+	b_score = (b->ref == NULL ? UINT64_MAX : 0);
+
+	return ((a_score < b_score) ? -1 : (a_score == b_score) ? 0 : 1);
+}
+
+/*
  * __evict_lru_cmp --
  *	Qsort function: sort the eviction array.
  */
@@ -1257,8 +1276,17 @@ __evict_lru_walk(WT_SESSION_IMPL *session)
 		queue->evict_current = NULL;
 
 	entries = queue->evict_entries;
-	__wt_qsort(queue->evict_queue,
-	    entries, sizeof(WT_EVICT_ENTRY), __evict_lru_cmp);
+	/*
+	 * Style note: __wt_qsort is a macro that can leave a dangling
+	 * else. Full curly braces are needed here for the compiler.
+	 */
+	if (F_ISSET(cache, WT_CACHE_EVICT_DEBUG_MODE)) {
+		__wt_qsort(queue->evict_queue,
+		    entries, sizeof(WT_EVICT_ENTRY), __evict_lru_cmp_debug);
+	} else {
+		__wt_qsort(queue->evict_queue,
+		    entries, sizeof(WT_EVICT_ENTRY), __evict_lru_cmp);
+	}
 
 	/* Trim empty entries from the end. */
 	while (entries > 0 && queue->evict_queue[entries - 1].ref == NULL)
@@ -2057,12 +2085,14 @@ __evict_walk_tree(WT_SESSION_IMPL *session, WT_EVICT_QUEUE *queue,
 		 * cache (indicated by seeing an internal page that is the
 		 * parent of the last page we saw).
 		 *
-		 * Also skip internal page unless we get aggressive or the tree
-		 * is idle (indicated by the tree being skipped for walks).
+		 * Also skip internal page unless we get aggressive, the tree
+		 * is idle (indicated by the tree being skipped for walks),
+		 * or we are in eviction debug mode.
 		 * The goal here is that if trees become completely idle, we
 		 * eventually push them out of cache completely.
 		 */
-		if (WT_PAGE_IS_INTERNAL(page)) {
+		if (!F_ISSET(cache, WT_CACHE_EVICT_DEBUG_MODE) &&
+		    WT_PAGE_IS_INTERNAL(page)) {
 			if (page == last_parent)
 				continue;
 			if (btree->evict_walk_period == 0 &&
diff --git a/src/third_party/wiredtiger/src/evict/evict_page.c b/src/third_party/wiredtiger/src/evict/evict_page.c
index 5618220774b..2510815401f 100644
--- a/src/third_party/wiredtiger/src/evict/evict_page.c
+++ b/src/third_party/wiredtiger/src/evict/evict_page.c
@@ -656,7 +656,13 @@ __evict_review(
 		else if (!WT_IS_METADATA(session->dhandle)) {
 			LF_SET(WT_REC_UPDATE_RESTORE);
 
-			if (F_ISSET(cache, WT_CACHE_EVICT_SCRUB))
+			/*
+			 * Scrub if we're supposed to or toss it in sometimes
+			 * if we are in debugging mode.
+			 */
+			if (F_ISSET(cache, WT_CACHE_EVICT_SCRUB) ||
+			    (F_ISSET(cache, WT_CACHE_EVICT_DEBUG_MODE) &&
+			    __wt_random(&session->rnd) % 3 == 0))
 				LF_SET(WT_REC_SCRUB);
 
 			/*
@@ -665,8 +671,16 @@ __evict_review(
 			 * suggests trying the lookaside table.
 			 */
 			if (F_ISSET(cache, WT_CACHE_EVICT_LOOKASIDE) &&
-			    !F_ISSET(conn, WT_CONN_EVICTION_NO_LOOKASIDE))
+			    !F_ISSET(conn, WT_CONN_EVICTION_NO_LOOKASIDE)) {
+				if (F_ISSET(cache,
+				    WT_CACHE_EVICT_DEBUG_MODE) &&
+				    __wt_random(&session->rnd) % 10 == 0) {
+					LF_CLR(WT_REC_SCRUB |
+					    WT_REC_UPDATE_RESTORE);
+					LF_SET(WT_REC_LOOKASIDE);
+				}
 				lookaside_retryp = &lookaside_retry;
+			}
 		}
 	}
 
diff --git a/src/third_party/wiredtiger/src/include/block.h b/src/third_party/wiredtiger/src/include/block.h
index 8efaf10dd2b..4cfe07f759d 100644
--- a/src/third_party/wiredtiger/src/include/block.h
+++ b/src/third_party/wiredtiger/src/include/block.h
@@ -125,6 +125,21 @@ struct __wt_size {
  */
 #define	WT_BM_CHECKPOINT_VERSION	1	/* Checkpoint format version */
 #define	WT_BLOCK_EXTLIST_MAGIC		71002	/* Identify a list */
+
+/*
+ * There are two versions of the extent list blocks: the original, and a second
+ * version where current checkpoint information is appended to the avail extent
+ * list.
+ */
+#define	WT_BLOCK_EXTLIST_VERSION_ORIG	0	/* Original version */
+#define	WT_BLOCK_EXTLIST_VERSION_CKPT	1	/* Checkpoint in avail output */
+
+/*
+ * Maximum buffer required to store a checkpoint: 1 version byte followed by
+ * 14 packed 8B values.
+ */
+#define	WT_BLOCK_CHECKPOINT_BUFFER	(1 + 14 * WT_INTPACK64_MAXSIZE)
+
 struct __wt_block_ckpt {
 	uint8_t	 version;			/* Version */
 
@@ -163,6 +178,8 @@ struct __wt_bm {
 	u_int (*block_header)(WT_BM *);
 	int (*checkpoint)
 	    (WT_BM *, WT_SESSION_IMPL *, WT_ITEM *, WT_CKPT *, bool);
+	int (*checkpoint_last)
+	    (WT_BM *, WT_SESSION_IMPL *, char **, char **, WT_ITEM *);
 	int (*checkpoint_load)(WT_BM *, WT_SESSION_IMPL *,
 	    const uint8_t *, size_t, uint8_t *, size_t *, bool);
 	int (*checkpoint_resolve)(WT_BM *, WT_SESSION_IMPL *, bool);
@@ -254,6 +271,8 @@ struct __wt_block {
 	enum { WT_CKPT_NONE=0, WT_CKPT_INPROGRESS,
 	    WT_CKPT_PANIC_ON_FAILURE, WT_CKPT_SALVAGE } ckpt_state;
 
+	WT_CKPT		*final_ckpt;	/* Final live checkpoint write */
+
 				/* Compaction support */
 	int	 compact_pct_tenths;	/* Percent to compact */
 	uint64_t compact_pages_reviewed;/* Pages reviewed */
diff --git a/src/third_party/wiredtiger/src/include/block.i b/src/third_party/wiredtiger/src/include/block.i
new file mode 100644
index 00000000000..3b9183a19fa
--- /dev/null
+++ b/src/third_party/wiredtiger/src/include/block.i
@@ -0,0 +1,39 @@
+/*-
+ * Copyright (c) 2014-2019 MongoDB, Inc.
+ * Copyright (c) 2008-2014 WiredTiger, Inc.
+ *	All rights reserved.
+ *
+ * See the file LICENSE for redistribution information.
+ */
+
+/*
+ * WiredTiger's block manager interface.
+ */
+
+/*
+ * __wt_extlist_write_pair --
+ *	Write an extent list pair.
+ */
+static inline int
+__wt_extlist_write_pair(uint8_t **p, wt_off_t off, wt_off_t size)
+{
+	WT_RET(__wt_vpack_uint(p, 0, (uint64_t)(off)));
+	WT_RET(__wt_vpack_uint(p, 0, (uint64_t)(size)));
+	return (0);
+}
+
+/*
+ * __wt_extlist_read_pair --
+ *	Read an extent list pair.
+ */
+static inline int
+__wt_extlist_read_pair(const uint8_t **p, wt_off_t *offp, wt_off_t *sizep)
+{
+	uint64_t v;
+
+	WT_RET(__wt_vunpack_uint(p, 0, &v));
+	*offp = (wt_off_t)v;
+	WT_RET(__wt_vunpack_uint(p, 0, &v));
+	*sizep = (wt_off_t)v;
+	return (0);
+}
diff --git a/src/third_party/wiredtiger/src/include/btmem.h b/src/third_party/wiredtiger/src/include/btmem.h
index 71a26862e4a..7729c9887d5 100644
--- a/src/third_party/wiredtiger/src/include/btmem.h
+++ b/src/third_party/wiredtiger/src/include/btmem.h
@@ -1130,9 +1130,9 @@ struct __wt_update {
 
 /*
  * WT_MODIFY_MEM_FACTOR	--
- *	Limit update chains to a factor of the base document size.
+ *	Limit update chains to a fraction of the base document size.
  */
-#define	WT_MODIFY_MEM_FACTOR	1
+#define	WT_MODIFY_MEM_FRACTION	10
 
 /*
  * WT_INSERT --
diff --git a/src/third_party/wiredtiger/src/include/btree.h b/src/third_party/wiredtiger/src/include/btree.h
index 0becfded2a9..44fae885ae1 100644
--- a/src/third_party/wiredtiger/src/include/btree.h
+++ b/src/third_party/wiredtiger/src/include/btree.h
@@ -16,6 +16,8 @@
 #define	WT_BTREE_MAJOR_VERSION_MAX	1	/* Newest version supported */
 #define	WT_BTREE_MINOR_VERSION_MAX	1
 
+#define	WT_BTREE_MIN_ALLOC_SIZE		512
+
 /*
  * The maximum btree leaf and internal page size is 512MB (2^29).  The limit
  * is enforced in software, it could be larger, specifically, the underlying
diff --git a/src/third_party/wiredtiger/src/include/btree.i b/src/third_party/wiredtiger/src/include/btree.i
index 162ea524b09..2fb9afd14a6 100644
--- a/src/third_party/wiredtiger/src/include/btree.i
+++ b/src/third_party/wiredtiger/src/include/btree.i
@@ -922,6 +922,7 @@ __wt_row_leaf_key_set_cell(WT_PAGE *page, WT_ROW *rip, WT_CELL *cell)
 	 */
 	v = WT_CELL_ENCODE_OFFSET(WT_PAGE_DISK_OFFSET(page, cell)) |
 	    WT_CELL_FLAG;
+	WT_ASSERT(NULL, WT_ROW_SLOT(page, rip) < page->entries);
 	WT_ROW_KEY_SET(rip, v);
 }
 
@@ -941,6 +942,7 @@ __wt_row_leaf_key_set(WT_PAGE *page, WT_ROW *rip, WT_CELL_UNPACK *unpack)
 	v = WT_K_ENCODE_KEY_LEN(unpack->size) |
 	    WT_K_ENCODE_KEY_OFFSET(WT_PAGE_DISK_OFFSET(page, unpack->data)) |
 	    WT_K_FLAG;
+	WT_ASSERT(NULL, WT_ROW_SLOT(page, rip) < page->entries);
 	WT_ROW_KEY_SET(rip, v);
 }
 
@@ -979,6 +981,7 @@ __wt_row_leaf_value_set(WT_PAGE *page, WT_ROW *rip, WT_CELL_UNPACK *unpack)
 	    WT_KV_ENCODE_VALUE_LEN(unpack->size) |
 	    WT_KV_ENCODE_KEY_OFFSET(key_offset) |
 	    WT_KV_ENCODE_VALUE_OFFSET(value_offset) | WT_KV_FLAG;
+	WT_ASSERT(NULL, WT_ROW_SLOT(page, rip) < page->entries);
 	WT_ROW_KEY_SET(rip, v);
 }
 
diff --git a/src/third_party/wiredtiger/src/include/cache.h b/src/third_party/wiredtiger/src/include/cache.h
index 07d25d13ec2..2146a00a76d 100644
--- a/src/third_party/wiredtiger/src/include/cache.h
+++ b/src/third_party/wiredtiger/src/include/cache.h
@@ -170,7 +170,7 @@ struct __wt_cache {
 	 * Score of how aggressive eviction should be about selecting eviction
 	 * candidates. If eviction is struggling to make progress, this score
 	 * rises (up to a maximum of 100), at which point the cache is "stuck"
-	 * and transaction will be rolled back.
+	 * and transactions will be rolled back.
 	 */
 	uint32_t evict_aggressive_score;
 
@@ -250,11 +250,12 @@ struct __wt_cache {
 /* AUTOMATIC FLAG VALUE GENERATION START */
 #define	WT_CACHE_EVICT_CLEAN	  0x01u	/* Evict clean pages */
 #define	WT_CACHE_EVICT_CLEAN_HARD 0x02u	/* Clean % blocking app threads */
-#define	WT_CACHE_EVICT_DIRTY	  0x04u	/* Evict dirty pages */
-#define	WT_CACHE_EVICT_DIRTY_HARD 0x08u	/* Dirty % blocking app threads */
-#define	WT_CACHE_EVICT_LOOKASIDE  0x10u	/* Try lookaside eviction */
-#define	WT_CACHE_EVICT_SCRUB	  0x20u	/* Scrub dirty pages */
-#define	WT_CACHE_EVICT_URGENT	  0x40u	/* Pages are in the urgent queue */
+#define	WT_CACHE_EVICT_DEBUG_MODE 0x04u	/* Aggressive debugging mode */
+#define	WT_CACHE_EVICT_DIRTY	  0x08u	/* Evict dirty pages */
+#define	WT_CACHE_EVICT_DIRTY_HARD 0x10u	/* Dirty % blocking app threads */
+#define	WT_CACHE_EVICT_LOOKASIDE  0x20u	/* Try lookaside eviction */
+#define	WT_CACHE_EVICT_SCRUB	  0x40u	/* Scrub dirty pages */
+#define	WT_CACHE_EVICT_URGENT	  0x80u	/* Pages are in the urgent queue */
 /* AUTOMATIC FLAG VALUE GENERATION STOP */
 #define	WT_CACHE_EVICT_ALL	(WT_CACHE_EVICT_CLEAN | WT_CACHE_EVICT_DIRTY)
 	uint32_t flags;
diff --git a/src/third_party/wiredtiger/src/include/config.h b/src/third_party/wiredtiger/src/include/config.h
index 64c55d7223b..847ddef1b2e 100644
--- a/src/third_party/wiredtiger/src/include/config.h
+++ b/src/third_party/wiredtiger/src/include/config.h
@@ -80,35 +80,36 @@ struct __wt_config_parser_impl {
 #define	WT_CONFIG_ENTRY_WT_SESSION_compact		22
 #define	WT_CONFIG_ENTRY_WT_SESSION_create		23
 #define	WT_CONFIG_ENTRY_WT_SESSION_drop			24
-#define	WT_CONFIG_ENTRY_WT_SESSION_join			25
-#define	WT_CONFIG_ENTRY_WT_SESSION_log_flush		26
-#define	WT_CONFIG_ENTRY_WT_SESSION_log_printf		27
-#define	WT_CONFIG_ENTRY_WT_SESSION_open_cursor		28
-#define	WT_CONFIG_ENTRY_WT_SESSION_prepare_transaction	29
-#define	WT_CONFIG_ENTRY_WT_SESSION_query_timestamp	30
-#define	WT_CONFIG_ENTRY_WT_SESSION_rebalance		31
-#define	WT_CONFIG_ENTRY_WT_SESSION_reconfigure		32
-#define	WT_CONFIG_ENTRY_WT_SESSION_rename		33
-#define	WT_CONFIG_ENTRY_WT_SESSION_reset		34
-#define	WT_CONFIG_ENTRY_WT_SESSION_rollback_transaction	35
-#define	WT_CONFIG_ENTRY_WT_SESSION_salvage		36
-#define	WT_CONFIG_ENTRY_WT_SESSION_snapshot		37
-#define	WT_CONFIG_ENTRY_WT_SESSION_strerror		38
-#define	WT_CONFIG_ENTRY_WT_SESSION_timestamp_transaction	39
-#define	WT_CONFIG_ENTRY_WT_SESSION_transaction_sync	40
-#define	WT_CONFIG_ENTRY_WT_SESSION_truncate		41
-#define	WT_CONFIG_ENTRY_WT_SESSION_upgrade		42
-#define	WT_CONFIG_ENTRY_WT_SESSION_verify		43
-#define	WT_CONFIG_ENTRY_colgroup_meta			44
-#define	WT_CONFIG_ENTRY_file_config			45
-#define	WT_CONFIG_ENTRY_file_meta			46
-#define	WT_CONFIG_ENTRY_index_meta			47
-#define	WT_CONFIG_ENTRY_lsm_meta			48
-#define	WT_CONFIG_ENTRY_table_meta			49
-#define	WT_CONFIG_ENTRY_wiredtiger_open			50
-#define	WT_CONFIG_ENTRY_wiredtiger_open_all		51
-#define	WT_CONFIG_ENTRY_wiredtiger_open_basecfg		52
-#define	WT_CONFIG_ENTRY_wiredtiger_open_usercfg		53
+#define	WT_CONFIG_ENTRY_WT_SESSION_import		25
+#define	WT_CONFIG_ENTRY_WT_SESSION_join			26
+#define	WT_CONFIG_ENTRY_WT_SESSION_log_flush		27
+#define	WT_CONFIG_ENTRY_WT_SESSION_log_printf		28
+#define	WT_CONFIG_ENTRY_WT_SESSION_open_cursor		29
+#define	WT_CONFIG_ENTRY_WT_SESSION_prepare_transaction	30
+#define	WT_CONFIG_ENTRY_WT_SESSION_query_timestamp	31
+#define	WT_CONFIG_ENTRY_WT_SESSION_rebalance		32
+#define	WT_CONFIG_ENTRY_WT_SESSION_reconfigure		33
+#define	WT_CONFIG_ENTRY_WT_SESSION_rename		34
+#define	WT_CONFIG_ENTRY_WT_SESSION_reset		35
+#define	WT_CONFIG_ENTRY_WT_SESSION_rollback_transaction	36
+#define	WT_CONFIG_ENTRY_WT_SESSION_salvage		37
+#define	WT_CONFIG_ENTRY_WT_SESSION_snapshot		38
+#define	WT_CONFIG_ENTRY_WT_SESSION_strerror		39
+#define	WT_CONFIG_ENTRY_WT_SESSION_timestamp_transaction	40
+#define	WT_CONFIG_ENTRY_WT_SESSION_transaction_sync	41
+#define	WT_CONFIG_ENTRY_WT_SESSION_truncate		42
+#define	WT_CONFIG_ENTRY_WT_SESSION_upgrade		43
+#define	WT_CONFIG_ENTRY_WT_SESSION_verify		44
+#define	WT_CONFIG_ENTRY_colgroup_meta			45
+#define	WT_CONFIG_ENTRY_file_config			46
+#define	WT_CONFIG_ENTRY_file_meta			47
+#define	WT_CONFIG_ENTRY_index_meta			48
+#define	WT_CONFIG_ENTRY_lsm_meta			49
+#define	WT_CONFIG_ENTRY_table_meta			50
+#define	WT_CONFIG_ENTRY_wiredtiger_open			51
+#define	WT_CONFIG_ENTRY_wiredtiger_open_all		52
+#define	WT_CONFIG_ENTRY_wiredtiger_open_basecfg		53
+#define	WT_CONFIG_ENTRY_wiredtiger_open_usercfg		54
 /*
  * configuration section: END
  * DO NOT EDIT: automatically built by dist/flags.py.
diff --git a/src/third_party/wiredtiger/src/include/extern.h b/src/third_party/wiredtiger/src/include/extern.h
index f122c5e8f84..370f467e930 100644
--- a/src/third_party/wiredtiger/src/include/extern.h
+++ b/src/third_party/wiredtiger/src/include/extern.h
@@ -15,7 +15,8 @@ extern int __wt_block_addr_invalid(WT_SESSION_IMPL *session, WT_BLOCK *block, co
 extern int __wt_block_addr_string(WT_SESSION_IMPL *session, WT_BLOCK *block, WT_ITEM *buf, const uint8_t *addr, size_t addr_size) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_buffer_to_ckpt(WT_SESSION_IMPL *session, WT_BLOCK *block, const uint8_t *p, WT_BLOCK_CKPT *ci) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_ckpt_decode(WT_SESSION *wt_session, size_t allocsize, const uint8_t *p, WT_BLOCK_CKPT *ci) WT_GCC_FUNC_DECL_ATTRIBUTE((visibility("default"))) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
-extern int __wt_block_ckpt_to_buffer(WT_SESSION_IMPL *session, WT_BLOCK *block, uint8_t **pp, WT_BLOCK_CKPT *ci) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_block_ckpt_to_buffer(WT_SESSION_IMPL *session, WT_BLOCK *block, uint8_t **pp, WT_BLOCK_CKPT *ci, bool skip_avail) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern void __wt_ckpt_verbose(WT_SESSION_IMPL *session, WT_BLOCK *block, const char *tag, const char *ckpt_name, const uint8_t *ckpt_string);
 extern int __wt_block_ckpt_init(WT_SESSION_IMPL *session, WT_BLOCK_CKPT *ci, const char *name) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_checkpoint_load(WT_SESSION_IMPL *session, WT_BLOCK *block, const uint8_t *addr, size_t addr_size, uint8_t *root_addr, size_t *root_addr_sizep, bool checkpoint) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_checkpoint_unload(WT_SESSION_IMPL *session, WT_BLOCK *block, bool checkpoint) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
@@ -23,6 +24,8 @@ extern void __wt_block_ckpt_destroy(WT_SESSION_IMPL *session, WT_BLOCK_CKPT *ci)
 extern int __wt_block_checkpoint_start(WT_SESSION_IMPL *session, WT_BLOCK *block) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_checkpoint(WT_SESSION_IMPL *session, WT_BLOCK *block, WT_ITEM *buf, WT_CKPT *ckptbase, bool data_checksum) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_checkpoint_resolve(WT_SESSION_IMPL *session, WT_BLOCK *block, bool failed) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_block_checkpoint_final(WT_SESSION_IMPL *session, WT_BLOCK *block, WT_ITEM *buf, uint8_t **file_sizep) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_block_checkpoint_last(WT_SESSION_IMPL *session, WT_BLOCK *block, char **metadatap, char **checkpoint_listp, WT_ITEM *checkpoint) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_compact_start(WT_SESSION_IMPL *session, WT_BLOCK *block) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_compact_end(WT_SESSION_IMPL *session, WT_BLOCK *block) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_block_compact_skip(WT_SESSION_IMPL *session, WT_BLOCK *block, bool *skipp) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
@@ -141,12 +144,14 @@ extern void __wt_btree_page_version_config(WT_SESSION_IMPL *session);
 extern int __wt_btree_open(WT_SESSION_IMPL *session, const char *op_cfg[]) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_btree_close(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_btree_discard(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_btree_config_encryptor(WT_SESSION_IMPL *session, const char **cfg, WT_KEYED_ENCRYPTOR **kencryptorp) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern void __wt_root_ref_init(WT_SESSION_IMPL *session, WT_REF *root_ref, WT_PAGE *root, bool is_recno);
 extern int __wt_btree_tree_open(WT_SESSION_IMPL *session, const uint8_t *addr, size_t addr_size) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_btree_new_leaf_page(WT_SESSION_IMPL *session, WT_PAGE **pagep) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern bool __wt_btree_immediately_durable(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_btree_huffman_open(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern void __wt_btree_huffman_close(WT_SESSION_IMPL *session);
+extern int __wt_import(WT_SESSION_IMPL *session, const char *uri) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_bt_read(WT_SESSION_IMPL *session, WT_ITEM *buf, const uint8_t *addr, size_t addr_size) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_bt_write(WT_SESSION_IMPL *session, WT_ITEM *buf, uint8_t *addr, size_t *addr_sizep, size_t *compressed_sizep, bool checkpoint, bool checkpoint_io, bool compressed) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern const char *__wt_page_type_string(u_int type) WT_GCC_FUNC_DECL_ATTRIBUTE((visibility("default")));
@@ -172,7 +177,7 @@ extern int __wt_bt_rebalance(WT_SESSION_IMPL *session, const char *cfg[]) WT_GCC
 extern int __wt_value_return_upd(WT_SESSION_IMPL *session, WT_CURSOR_BTREE *cbt, WT_UPDATE *upd, bool ignore_visibility) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_key_return(WT_SESSION_IMPL *session, WT_CURSOR_BTREE *cbt) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_value_return(WT_SESSION_IMPL *session, WT_CURSOR_BTREE *cbt, WT_UPDATE *upd) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
-extern int __wt_bt_salvage(WT_SESSION_IMPL *session, WT_CKPT *ckptbase, const char *cfg[]) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_salvage(WT_SESSION_IMPL *session, const char *cfg[]) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_multi_to_ref(WT_SESSION_IMPL *session, WT_PAGE *page, WT_MULTI *multi, WT_REF **refp, size_t *incrp, bool closing) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_split_insert(WT_SESSION_IMPL *session, WT_REF *ref) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_split_multi(WT_SESSION_IMPL *session, WT_REF *ref, int closing) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
@@ -237,6 +242,7 @@ extern void __wt_conn_foc_discard(WT_SESSION_IMPL *session);
 extern int __wt_configure_method(WT_SESSION_IMPL *session, const char *method, const char *uri, const char *config, const char *type, const char *check) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_config_check(WT_SESSION_IMPL *session, const WT_CONFIG_ENTRY *entry, const char *config, size_t config_len) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_config_collapse(WT_SESSION_IMPL *session, const char **cfg, char **config_ret) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_config_discard_defaults(WT_SESSION_IMPL *session, const char **cfg, const char *config, char **config_ret) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_config_merge(WT_SESSION_IMPL *session, const char **cfg, const char *cfg_strip, const char **config_ret) WT_GCC_FUNC_DECL_ATTRIBUTE((visibility("default"))) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_conn_config_init(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern void __wt_conn_config_discard(WT_SESSION_IMPL *session);
@@ -516,8 +522,10 @@ extern int __wt_meta_apply_all(WT_SESSION_IMPL *session, int (*file_func)(WT_SES
 extern int __wt_meta_checkpoint(WT_SESSION_IMPL *session, const char *fname, const char *checkpoint, WT_CKPT *ckpt) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_meta_checkpoint_last_name(WT_SESSION_IMPL *session, const char *fname, const char **namep) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_meta_checkpoint_clear(WT_SESSION_IMPL *session, const char *fname) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
-extern int __wt_meta_ckptlist_get(WT_SESSION_IMPL *session, const char *fname, WT_CKPT **ckptbasep) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_meta_block_metadata(WT_SESSION_IMPL *session, const char *config, WT_CKPT *ckpt) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_meta_ckptlist_get(WT_SESSION_IMPL *session, const char *fname, bool update, WT_CKPT **ckptbasep) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_metadata_set_base_write_gen(WT_SESSION_IMPL *session) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
+extern int __wt_meta_ckptlist_to_meta(WT_SESSION_IMPL *session, WT_CKPT *ckptbase, WT_ITEM *buf) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_meta_ckptlist_set(WT_SESSION_IMPL *session, const char *fname, WT_CKPT *ckptbase, WT_LSN *ckptlsn) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern void __wt_meta_ckptlist_free(WT_SESSION_IMPL *session, WT_CKPT **ckptbasep);
 extern void __wt_meta_checkpoint_free(WT_SESSION_IMPL *session, WT_CKPT *ckpt);
@@ -702,7 +710,6 @@ extern int __wt_session_get_btree_ckpt(WT_SESSION_IMPL *session, const char *uri
 extern void __wt_session_close_cache(WT_SESSION_IMPL *session);
 extern int __wt_session_get_dhandle(WT_SESSION_IMPL *session, const char *uri, const char *checkpoint, const char *cfg[], uint32_t flags) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_session_lock_checkpoint(WT_SESSION_IMPL *session, const char *checkpoint) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
-extern int __wt_salvage(WT_SESSION_IMPL *session, const char *cfg[]) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern int __wt_cond_auto_alloc(WT_SESSION_IMPL *session, const char *name, uint64_t min, uint64_t max, WT_CONDVAR **condp) WT_GCC_FUNC_DECL_ATTRIBUTE((warn_unused_result));
 extern void __wt_cond_auto_wait_signal(WT_SESSION_IMPL *session, WT_CONDVAR *cond, bool progress, bool (*run_func)(WT_SESSION_IMPL *), bool *signalled);
 extern void __wt_cond_auto_wait(WT_SESSION_IMPL *session, WT_CONDVAR *cond, bool progress, bool (*run_func)(WT_SESSION_IMPL *));
diff --git a/src/third_party/wiredtiger/src/include/meta.h b/src/third_party/wiredtiger/src/include/meta.h
index 0b08b318c3d..ac9e0be3c20 100644
--- a/src/third_party/wiredtiger/src/include/meta.h
+++ b/src/third_party/wiredtiger/src/include/meta.h
@@ -66,9 +66,19 @@
 struct __wt_ckpt {
 	char	*name;			/* Name or NULL */
 
-	WT_ITEM  addr;			/* Checkpoint cookie string */
-	WT_ITEM  raw;			/* Checkpoint cookie raw */
-
+	/*
+	 * Each internal checkpoint name is appended with a generation
+	 * to make it a unique name.  We're solving two problems: when
+	 * two checkpoints are taken quickly, the timer may not be
+	 * unique and/or we can even see time travel on the second
+	 * checkpoint if we snapshot the time in-between nanoseconds
+	 * rolling over.  Second, if we reset the generational counter
+	 * when new checkpoints arrive, we could logically re-create
+	 * specific checkpoints, racing with cursors open on those
+	 * checkpoints.  I can't think of any way to return incorrect
+	 * results by racing with those cursors, but it's simpler not
+	 * to worry about it.
+	 */
 	int64_t	 order;			/* Checkpoint order */
 
 	uint64_t sec;                   /* Wall clock time */
@@ -77,6 +87,9 @@ struct __wt_ckpt {
 
 	uint64_t write_gen;		/* Write generation */
 
+	char	*block_metadata;	/* Block-stored metadata */
+	char	*block_checkpoint;	/* Block-stored checkpoint */
+
 					/* Validity window */
 	wt_timestamp_t	newest_durable_ts;
 	wt_timestamp_t	oldest_start_ts;
@@ -84,6 +97,9 @@ struct __wt_ckpt {
 	wt_timestamp_t	newest_stop_ts;
 	uint64_t	newest_stop_txn;
 
+	WT_ITEM  addr;			/* Checkpoint cookie string */
+	WT_ITEM  raw;			/* Checkpoint cookie raw */
+
 	void	*bpriv;			/* Block manager private */
 
 /* AUTOMATIC FLAG VALUE GENERATION START */
diff --git a/src/third_party/wiredtiger/src/include/misc.i b/src/third_party/wiredtiger/src/include/misc.i
index ab24e87f34a..b552f9b1f3e 100644
--- a/src/third_party/wiredtiger/src/include/misc.i
+++ b/src/third_party/wiredtiger/src/include/misc.i
@@ -255,13 +255,26 @@ __wt_spin_backoff(uint64_t *yield_count, uint64_t *sleep_usecs)
 static inline void
 __wt_timing_stress(WT_SESSION_IMPL *session, u_int flag)
 {
-	uint64_t i;
+	double pct;
+	uint64_t i, max;
 
 	/* Optionally only sleep when a specified configuration flag is set. */
 	if (flag != 0 && !FLD_ISSET(S2C(session)->timing_stress_flags, flag))
 		return;
 
 	/*
+	 * If there is a lot of cache pressure, don't let the sleep time
+	 * get too large. If the cache is totally full, return.
+	 */
+	pct = 0.0;
+	if (__wt_eviction_needed(session, false, false, &pct))
+		max = 5;
+	else
+		max = 9;
+	if (pct > 100.0)
+		return;
+
+	/*
 	 * We need a fast way to choose a sleep time. We want to sleep a short
 	 * period most of the time, but occasionally wait longer. Divide the
 	 * maximum period of time into 10 buckets (where bucket 0 doesn't sleep
@@ -269,7 +282,7 @@ __wt_timing_stress(WT_SESSION_IMPL *session, u_int flag)
 	 * That means we'll hit the maximum roughly every 1K calls.
 	 */
 	for (i = 0;;)
-		if (__wt_random(&session->rnd) & 0x1 || ++i > 9)
+		if (__wt_random(&session->rnd) & 0x1 || ++i > max)
 			break;
 
 	if (i == 0)
diff --git a/src/third_party/wiredtiger/src/include/stat.h b/src/third_party/wiredtiger/src/include/stat.h
index e752ac05c0d..26c030009e6 100644
--- a/src/third_party/wiredtiger/src/include/stat.h
+++ b/src/third_party/wiredtiger/src/include/stat.h
@@ -633,6 +633,8 @@ struct __wt_connection_stats {
 	int64_t session_table_create_success;
 	int64_t session_table_drop_fail;
 	int64_t session_table_drop_success;
+	int64_t session_table_import_fail;
+	int64_t session_table_import_success;
 	int64_t session_table_rebalance_fail;
 	int64_t session_table_rebalance_success;
 	int64_t session_table_rename_fail;
diff --git a/src/third_party/wiredtiger/src/include/txn.h b/src/third_party/wiredtiger/src/include/txn.h
index 29ad33f3b76..2a514629006 100644
--- a/src/third_party/wiredtiger/src/include/txn.h
+++ b/src/third_party/wiredtiger/src/include/txn.h
@@ -242,6 +242,11 @@ struct __wt_txn_op {
 			} mode;
 		} truncate_row;
 	} u;
+
+/* AUTOMATIC FLAG VALUE GENERATION START */
+#define	WT_TXN_OP_KEY_REPEATED	0x1u
+/* AUTOMATIC FLAG VALUE GENERATION STOP */
+	uint32_t flags;
 };
 
 /*
@@ -305,14 +310,6 @@ struct __wt_txn {
 	WT_TXN_OP      *mod;
 	size_t		mod_alloc;
 	u_int		mod_count;
-#ifdef HAVE_DIAGNOSTIC
-	/*
-	 * Reference count of multiple updates processed, as part of a single
-	 * transaction operation processing for resolving the indirect update
-	 * references in a prepared transaction as part of commit.
-	 */
-	u_int		multi_update_count;
-#endif
 
 	/* Scratch buffer for in-memory log records. */
 	WT_ITEM	       *logrec;
diff --git a/src/third_party/wiredtiger/src/include/txn.i b/src/third_party/wiredtiger/src/include/txn.i
index 0c8e22c90d1..1aea1e854d3 100644
--- a/src/third_party/wiredtiger/src/include/txn.i
+++ b/src/third_party/wiredtiger/src/include/txn.i
@@ -171,17 +171,21 @@ __txn_resolve_prepared_update(WT_SESSION_IMPL *session, WT_UPDATE *upd)
 
 /*
  * __wt_txn_resolve_prepared_op --
- *      Resolve a transaction operation indirect references.
+ *      Resolve a transaction's operations indirect references.
  *
  *      In case of prepared transactions, the prepared updates could be evicted
  *      using cache overflow mechanism. Transaction operations referring to
  *      these prepared updates would be referring to them using indirect
  *      references (i.e keys/recnos), which need to be resolved as part of that
  *      transaction commit/rollback.
+ *
+ *      If no updates are resolved throw an error. Increment resolved update
+ *      count for each resolved update count we locate.
  */
 static inline int
 __wt_txn_resolve_prepared_op(
-    WT_SESSION_IMPL *session, WT_TXN_OP *op, bool commit)
+    WT_SESSION_IMPL *session, WT_TXN_OP *op, bool commit,
+    int64_t *resolved_update_countp)
 {
 	WT_CURSOR *cursor;
 	WT_DECL_RET;
@@ -218,37 +222,29 @@ __wt_txn_resolve_prepared_op(
 	    (WT_CURSOR_BTREE *)cursor, &upd));
 	WT_ERR(ret);
 
-#ifdef HAVE_DIAGNOSTIC
-	/*
-	 * Do what we can to ensure that finding prepared updates from a key
-	 * is working as expected. In the case where a transaction has updated
-	 * the same key multiple times, it's possible to resolve all updates
-	 * for the key when processing the first op structure, and then have
-	 * eviction free those updates before subsequent ops are processed,
-	 * which means a search could reasonably not find an update in that
-	 * case.
-	 * We track the update count only for commit, but not for rollback, as
-	 * our tracking is based on transaction id, and in case of rollback, we
-	 * set it to aborted.
-	 */
-	if (upd == NULL && commit) {
-		/*
-		 * FIXME:
-		 * WT_ASSERT(session, txn->multi_update_count > 0);
-		 */
-		--txn->multi_update_count;
+	/* If we haven't found anything then there's an error. */
+	if (upd == NULL) {
+		WT_ASSERT(session, upd != NULL);
+		WT_ERR(WT_NOTFOUND);
 	}
-#endif
-
-	WT_STAT_CONN_INCR(session, txn_prepared_updates_resolved);
 
 	for (; upd != NULL; upd = upd->next) {
-		 if (upd->txnid != txn->id)
+		/*
+		 * Aborted updates can exist in the update chain of our txn.
+		 * Generally this will occur due to a reserved update.
+		 * As such we should skip over these updates. If the txn
+		 * id is then different and not aborted we know we've
+		 * reached the end of our update chain and can exit.
+		 */
+		if (upd->txnid == WT_TXN_ABORTED)
 			continue;
-
+		if (upd->txnid != txn->id)
+			break;
 		if (op->u.op_upd == NULL)
 			op->u.op_upd = upd;
 
+		++(*resolved_update_countp);
+
 		if (!commit) {
 			upd->txnid = WT_TXN_ABORTED;
 			continue;
@@ -282,52 +278,9 @@ __wt_txn_resolve_prepared_op(
 		 * thing as part of "txn_op2".
 		 */
 
-#ifdef HAVE_DIAGNOSTIC
-		/*
-		 * When an update is not identified for resolution of a
-		 * transaction operation, it might have been already processed
-		 * during the resolution of a previous update belonging to the
-		 * same key. To ascertain transaction tracks multiple extra
-		 * updates processed in resolution of an transaction operation.
-		 */
-		if (upd->prepare_state == WT_PREPARE_RESOLVED) {
-			/*
-			 * FIXME:
-			 * WT_ASSERT(session, txn->multi_update_count > 0);
-			 */
-			--txn->multi_update_count;
-		} else if (upd != op->u.op_upd)
-			++txn->multi_update_count;
-#endif
-
-		if (upd->prepare_state == WT_PREPARE_RESOLVED)
-			break;
-
 		/* Resolve the prepared update to be committed update. */
 		__txn_resolve_prepared_update(session, upd);
 	}
-
-	/* FIXME: it isn't safe to walk updates after they are resolved. */
-#if 0 && defined(HAVE_DIAGNOSTIC)
-	upd = op->u.op_upd;
-	/* Ensure that we have not missed any of this transaction updates. */
-	for (; upd != NULL; upd = upd->next) {
-		/*
-		 * Should not have an unprocessed uncommitted update of this
-		 * transaction. For commit, no uncommitted update of this
-		 * transaction should be in prepared state. For rollback, there
-		 * should not be any more uncommitted updates from this
-		 * transaction.
-		 */
-		if (commit && upd->txnid == txn->id)
-			WT_ASSERT(session,
-			    upd->prepare_state != WT_PREPARE_INPROGRESS);
-		else
-			WT_ASSERT(session, upd->txnid != txn->id);
-
-	}
-#endif
-
 err:    WT_TRET(cursor->close(cursor));
 	return (ret);
 }
@@ -443,6 +396,43 @@ __wt_txn_op_apply_prepare_state(
 }
 
 /*
+ * __wt_txn_op_delete_commit_apply_timestamps --
+ *	Apply the correct start and durable timestamps to any
+ *	updates in the page del update list.
+ */
+static inline void
+__wt_txn_op_delete_commit_apply_timestamps(
+    WT_SESSION_IMPL *session, WT_REF *ref)
+{
+	WT_TXN *txn;
+	WT_UPDATE **updp;
+	uint32_t previous_state;
+
+	txn = &session->txn;
+
+	/*
+	 * Lock the ref to ensure we don't race with eviction freeing the page
+	 * deleted update list or with a page instantiate.
+	 */
+	for (;; __wt_yield()) {
+		previous_state = ref->state;
+		WT_ASSERT(session, previous_state != WT_REF_READING);
+		if (previous_state != WT_REF_LOCKED && WT_REF_CAS_STATE(
+		    session, ref, previous_state, WT_REF_LOCKED))
+			break;
+	}
+
+	for (updp = ref->page_del->update_list;
+	    updp != NULL && *updp != NULL; ++updp) {
+		(*updp)->start_ts = txn->commit_timestamp;
+		(*updp)->durable_ts = txn->durable_timestamp;
+	}
+
+	/* Unlock the page by setting it back to it's previous state */
+	WT_REF_SET_STATE(ref, previous_state);
+}
+
+/*
  * __wt_txn_op_set_timestamp --
  *	Decide whether to copy a commit timestamp into an update. If the op
  *	structure doesn't have a populated update or ref field or in prepared
@@ -496,6 +486,10 @@ __wt_txn_op_set_timestamp(WT_SESSION_IMPL *session, WT_TXN_OP *op)
 			    &op->u.op_upd->durable_ts;
 			*timestamp = txn->durable_timestamp;
 		}
+
+		if (op->type == WT_TXN_OP_REF_DELETE)
+			__wt_txn_op_delete_commit_apply_timestamps(
+			    session, op->u.ref);
 	}
 }
 
@@ -511,9 +505,14 @@ __wt_txn_modify(WT_SESSION_IMPL *session, WT_UPDATE *upd)
 
 	txn = &session->txn;
 
-	if (F_ISSET(txn, WT_TXN_READONLY))
+	if (F_ISSET(txn, WT_TXN_READONLY)) {
+		if (F_ISSET(txn, WT_TXN_IGNORE_PREPARE))
+			WT_RET_MSG(session, ENOTSUP,
+			    "Transactions with ignore_prepare=true"
+			    " cannot perform updates");
 		WT_RET_MSG(session, WT_ROLLBACK,
 		    "Attempt to update in a read-only transaction");
+	}
 
 	WT_RET(__txn_next_op(session, &op));
 	if (F_ISSET(session, WT_SESSION_LOGGING_INMEM)) {
diff --git a/src/third_party/wiredtiger/src/include/wiredtiger.in b/src/third_party/wiredtiger/src/include/wiredtiger.in
index 9830d79a190..484175dd43e 100644
--- a/src/third_party/wiredtiger/src/include/wiredtiger.in
+++ b/src/third_party/wiredtiger/src/include/wiredtiger.in
@@ -1448,6 +1448,21 @@ struct __wt_session {
 	int __F(create)(WT_SESSION *session,
 	    const char *name, const char *config);
 
+#if !defined(SWIG) && !defined(DOXYGEN)
+	/*!
+	 * Import a file.
+	 *
+	 * @snippet ex_all.c Import a file
+	 *
+	 * @param session the session handle
+	 * @param name the URI of the object to import
+	 * @configempty{WT_SESSION.import, see dist/api_data.py}
+	 * @errors
+	 */
+	int __F(import)(WT_SESSION *session,
+	    const char *name, const char *config);
+#endif
+
 	/*!
 	 * Compact a live row- or column-store btree or LSM tree.
 	 *
@@ -2284,16 +2299,23 @@ struct __wt_connection {
 	 * checkpoints.  Zero or one means perform normal archiving., an integer
 	 * between 0 and 1024; default \c 0.}
 	 * @config{&nbsp;&nbsp;&nbsp;&nbsp;
-	 * rollback_error, return a WT_ROLLBACK error from a transaction
-	 * operation about every Nth operation to simulate a collision., an
-	 * integer between 0 and 10M; default \c 0.}
-	 * @config{&nbsp;&nbsp;&nbsp;&nbsp;table_logging, if true\, write
-	 * transaction related information to the log for all operations\, even
-	 * operations for tables with logging turned off.  This setting
-	 * introduces a log format change that may break older versions of
-	 * WiredTiger.  These operations are informational and skipped in
-	 * recovery., a boolean flag; default \c false.}
-	 * @config{ ),,}
+	 * eviction, if true\, modify internal algorithms to change skew to
+	 * force lookaside eviction to happen more aggressively.  This includes
+	 * but is not limited to not skewing newest\, not favoring leaf pages\,
+	 * and modifying the eviction score mechanism., a boolean flag; default
+	 * \c false.}
+	 * @config{&nbsp;&nbsp;&nbsp;&nbsp;rollback_error, return a
+	 * WT_ROLLBACK error from a transaction operation about every Nth
+	 * operation to simulate a collision., an integer between 0 and 10M;
+	 * default \c 0.}
+	 * @config{&nbsp;&nbsp;&nbsp;&nbsp;table_logging, if
+	 * true\, write transaction related information to the log for all
+	 * operations\, even operations for tables with logging turned off.
+	 * This setting introduces a log format change that may break older
+	 * versions of WiredTiger.  These operations are informational and
+	 * skipped in recovery., a boolean flag; default \c false.}
+	 * @config{
+	 * ),,}
 	 * @config{error_prefix, prefix string for error messages., a string;
 	 * default empty.}
 	 * @config{eviction = (, eviction configuration options., a set of
@@ -2928,14 +2950,21 @@ struct __wt_connection {
  * @config{&nbsp;&nbsp;&nbsp;&nbsp;checkpoint_retention, adjust log archiving to
  * retain the log records of this number of checkpoints.  Zero or one means
  * perform normal archiving., an integer between 0 and 1024; default \c 0.}
- * @config{&nbsp;&nbsp;&nbsp;&nbsp;rollback_error, return a WT_ROLLBACK error
- * from a transaction operation about every Nth operation to simulate a
- * collision., an integer between 0 and 10M; default \c 0.}
- * @config{&nbsp;&nbsp;&nbsp;&nbsp;table_logging, if true\, write transaction
- * related information to the log for all operations\, even operations for
- * tables with logging turned off.  This setting introduces a log format change
- * that may break older versions of WiredTiger.  These operations are
- * informational and skipped in recovery., a boolean flag; default \c false.}
+ * @config{&nbsp;&nbsp;&nbsp;&nbsp;eviction, if true\, modify internal
+ * algorithms to change skew to force lookaside eviction to happen more
+ * aggressively.  This includes but is not limited to not skewing newest\, not
+ * favoring leaf pages\, and modifying the eviction score mechanism., a boolean
+ * flag; default \c false.}
+ * @config{&nbsp;&nbsp;&nbsp;&nbsp;rollback_error,
+ * return a WT_ROLLBACK error from a transaction operation about every Nth
+ * operation to simulate a collision., an integer between 0 and 10M; default \c
+ * 0.}
+ * @config{&nbsp;&nbsp;&nbsp;&nbsp;table_logging, if true\, write
+ * transaction related information to the log for all operations\, even
+ * operations for tables with logging turned off.  This setting introduces a log
+ * format change that may break older versions of WiredTiger.  These operations
+ * are informational and skipped in recovery., a boolean flag; default \c
+ * false.}
  * @config{ ),,}
  * @config{direct_io, Use \c O_DIRECT on POSIX systems\, and \c
  * FILE_FLAG_NO_BUFFERING on Windows to access files.  Options are given as a
@@ -5697,201 +5726,205 @@ extern int wiredtiger_extension_terminate(WT_CONNECTION *connection);
 #define	WT_STAT_CONN_SESSION_TABLE_DROP_FAIL		1307
 /*! session: table drop successful calls */
 #define	WT_STAT_CONN_SESSION_TABLE_DROP_SUCCESS		1308
+/*! session: table import failed calls */
+#define	WT_STAT_CONN_SESSION_TABLE_IMPORT_FAIL		1309
+/*! session: table import successful calls */
+#define	WT_STAT_CONN_SESSION_TABLE_IMPORT_SUCCESS	1310
 /*! session: table rebalance failed calls */
-#define	WT_STAT_CONN_SESSION_TABLE_REBALANCE_FAIL	1309
+#define	WT_STAT_CONN_SESSION_TABLE_REBALANCE_FAIL	1311
 /*! session: table rebalance successful calls */
-#define	WT_STAT_CONN_SESSION_TABLE_REBALANCE_SUCCESS	1310
+#define	WT_STAT_CONN_SESSION_TABLE_REBALANCE_SUCCESS	1312
 /*! session: table rename failed calls */
-#define	WT_STAT_CONN_SESSION_TABLE_RENAME_FAIL		1311
+#define	WT_STAT_CONN_SESSION_TABLE_RENAME_FAIL		1313
 /*! session: table rename successful calls */
-#define	WT_STAT_CONN_SESSION_TABLE_RENAME_SUCCESS	1312
+#define	WT_STAT_CONN_SESSION_TABLE_RENAME_SUCCESS	1314
 /*! session: table salvage failed calls */
-#define	WT_STAT_CONN_SESSION_TABLE_SALVAGE_FAIL		1313
+#define	WT_STAT_CONN_SESSION_TABLE_SALVAGE_FAIL		1315
 /*! session: table salvage successful calls */
-#define	WT_STAT_CONN_SESSION_TABLE_SALVAGE_SUCCESS	1314
+#define	WT_STAT_CONN_SESSION_TABLE_SALVAGE_SUCCESS	1316
 /*! session: table truncate failed calls */
-#define	WT_STAT_CONN_SESSION_TABLE_TRUNCATE_FAIL	1315
+#define	WT_STAT_CONN_SESSION_TABLE_TRUNCATE_FAIL	1317
 /*! session: table truncate successful calls */
-#define	WT_STAT_CONN_SESSION_TABLE_TRUNCATE_SUCCESS	1316
+#define	WT_STAT_CONN_SESSION_TABLE_TRUNCATE_SUCCESS	1318
 /*! session: table verify failed calls */
-#define	WT_STAT_CONN_SESSION_TABLE_VERIFY_FAIL		1317
+#define	WT_STAT_CONN_SESSION_TABLE_VERIFY_FAIL		1319
 /*! session: table verify successful calls */
-#define	WT_STAT_CONN_SESSION_TABLE_VERIFY_SUCCESS	1318
+#define	WT_STAT_CONN_SESSION_TABLE_VERIFY_SUCCESS	1320
 /*! thread-state: active filesystem fsync calls */
-#define	WT_STAT_CONN_THREAD_FSYNC_ACTIVE		1319
+#define	WT_STAT_CONN_THREAD_FSYNC_ACTIVE		1321
 /*! thread-state: active filesystem read calls */
-#define	WT_STAT_CONN_THREAD_READ_ACTIVE			1320
+#define	WT_STAT_CONN_THREAD_READ_ACTIVE			1322
 /*! thread-state: active filesystem write calls */
-#define	WT_STAT_CONN_THREAD_WRITE_ACTIVE		1321
+#define	WT_STAT_CONN_THREAD_WRITE_ACTIVE		1323
 /*! thread-yield: application thread time evicting (usecs) */
-#define	WT_STAT_CONN_APPLICATION_EVICT_TIME		1322
+#define	WT_STAT_CONN_APPLICATION_EVICT_TIME		1324
 /*! thread-yield: application thread time waiting for cache (usecs) */
-#define	WT_STAT_CONN_APPLICATION_CACHE_TIME		1323
+#define	WT_STAT_CONN_APPLICATION_CACHE_TIME		1325
 /*!
  * thread-yield: connection close blocked waiting for transaction state
  * stabilization
  */
-#define	WT_STAT_CONN_TXN_RELEASE_BLOCKED		1324
+#define	WT_STAT_CONN_TXN_RELEASE_BLOCKED		1326
 /*! thread-yield: connection close yielded for lsm manager shutdown */
-#define	WT_STAT_CONN_CONN_CLOSE_BLOCKED_LSM		1325
+#define	WT_STAT_CONN_CONN_CLOSE_BLOCKED_LSM		1327
 /*! thread-yield: data handle lock yielded */
-#define	WT_STAT_CONN_DHANDLE_LOCK_BLOCKED		1326
+#define	WT_STAT_CONN_DHANDLE_LOCK_BLOCKED		1328
 /*!
  * thread-yield: get reference for page index and slot time sleeping
  * (usecs)
  */
-#define	WT_STAT_CONN_PAGE_INDEX_SLOT_REF_BLOCKED	1327
+#define	WT_STAT_CONN_PAGE_INDEX_SLOT_REF_BLOCKED	1329
 /*! thread-yield: log server sync yielded for log write */
-#define	WT_STAT_CONN_LOG_SERVER_SYNC_BLOCKED		1328
+#define	WT_STAT_CONN_LOG_SERVER_SYNC_BLOCKED		1330
 /*! thread-yield: page access yielded due to prepare state change */
-#define	WT_STAT_CONN_PREPARED_TRANSITION_BLOCKED_PAGE	1329
+#define	WT_STAT_CONN_PREPARED_TRANSITION_BLOCKED_PAGE	1331
 /*! thread-yield: page acquire busy blocked */
-#define	WT_STAT_CONN_PAGE_BUSY_BLOCKED			1330
+#define	WT_STAT_CONN_PAGE_BUSY_BLOCKED			1332
 /*! thread-yield: page acquire eviction blocked */
-#define	WT_STAT_CONN_PAGE_FORCIBLE_EVICT_BLOCKED	1331
+#define	WT_STAT_CONN_PAGE_FORCIBLE_EVICT_BLOCKED	1333
 /*! thread-yield: page acquire locked blocked */
-#define	WT_STAT_CONN_PAGE_LOCKED_BLOCKED		1332
+#define	WT_STAT_CONN_PAGE_LOCKED_BLOCKED		1334
 /*! thread-yield: page acquire read blocked */
-#define	WT_STAT_CONN_PAGE_READ_BLOCKED			1333
+#define	WT_STAT_CONN_PAGE_READ_BLOCKED			1335
 /*! thread-yield: page acquire time sleeping (usecs) */
-#define	WT_STAT_CONN_PAGE_SLEEP				1334
+#define	WT_STAT_CONN_PAGE_SLEEP				1336
 /*!
  * thread-yield: page delete rollback time sleeping for state change
  * (usecs)
  */
-#define	WT_STAT_CONN_PAGE_DEL_ROLLBACK_BLOCKED		1335
+#define	WT_STAT_CONN_PAGE_DEL_ROLLBACK_BLOCKED		1337
 /*! thread-yield: page reconciliation yielded due to child modification */
-#define	WT_STAT_CONN_CHILD_MODIFY_BLOCKED_PAGE		1336
+#define	WT_STAT_CONN_CHILD_MODIFY_BLOCKED_PAGE		1338
 /*! transaction: Number of prepared updates */
-#define	WT_STAT_CONN_TXN_PREPARED_UPDATES_COUNT		1337
+#define	WT_STAT_CONN_TXN_PREPARED_UPDATES_COUNT		1339
 /*! transaction: Number of prepared updates added to cache overflow */
-#define	WT_STAT_CONN_TXN_PREPARED_UPDATES_LOOKASIDE_INSERTS	1338
+#define	WT_STAT_CONN_TXN_PREPARED_UPDATES_LOOKASIDE_INSERTS	1340
 /*! transaction: Number of prepared updates resolved */
-#define	WT_STAT_CONN_TXN_PREPARED_UPDATES_RESOLVED	1339
+#define	WT_STAT_CONN_TXN_PREPARED_UPDATES_RESOLVED	1341
 /*! transaction: commit timestamp queue entries walked */
-#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_WALKED		1340
+#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_WALKED		1342
 /*! transaction: commit timestamp queue insert to empty */
-#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_EMPTY		1341
+#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_EMPTY		1343
 /*! transaction: commit timestamp queue inserts to head */
-#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_HEAD		1342
+#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_HEAD		1344
 /*! transaction: commit timestamp queue inserts total */
-#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_INSERTS		1343
+#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_INSERTS		1345
 /*! transaction: commit timestamp queue length */
-#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_LEN		1344
+#define	WT_STAT_CONN_TXN_COMMIT_QUEUE_LEN		1346
 /*! transaction: number of named snapshots created */
-#define	WT_STAT_CONN_TXN_SNAPSHOTS_CREATED		1345
+#define	WT_STAT_CONN_TXN_SNAPSHOTS_CREATED		1347
 /*! transaction: number of named snapshots dropped */
-#define	WT_STAT_CONN_TXN_SNAPSHOTS_DROPPED		1346
+#define	WT_STAT_CONN_TXN_SNAPSHOTS_DROPPED		1348
 /*! transaction: prepared transactions */
-#define	WT_STAT_CONN_TXN_PREPARE			1347
+#define	WT_STAT_CONN_TXN_PREPARE			1349
 /*! transaction: prepared transactions committed */
-#define	WT_STAT_CONN_TXN_PREPARE_COMMIT			1348
+#define	WT_STAT_CONN_TXN_PREPARE_COMMIT			1350
 /*! transaction: prepared transactions currently active */
-#define	WT_STAT_CONN_TXN_PREPARE_ACTIVE			1349
+#define	WT_STAT_CONN_TXN_PREPARE_ACTIVE			1351
 /*! transaction: prepared transactions rolled back */
-#define	WT_STAT_CONN_TXN_PREPARE_ROLLBACK		1350
+#define	WT_STAT_CONN_TXN_PREPARE_ROLLBACK		1352
 /*! transaction: query timestamp calls */
-#define	WT_STAT_CONN_TXN_QUERY_TS			1351
+#define	WT_STAT_CONN_TXN_QUERY_TS			1353
 /*! transaction: read timestamp queue entries walked */
-#define	WT_STAT_CONN_TXN_READ_QUEUE_WALKED		1352
+#define	WT_STAT_CONN_TXN_READ_QUEUE_WALKED		1354
 /*! transaction: read timestamp queue insert to empty */
-#define	WT_STAT_CONN_TXN_READ_QUEUE_EMPTY		1353
+#define	WT_STAT_CONN_TXN_READ_QUEUE_EMPTY		1355
 /*! transaction: read timestamp queue inserts to head */
-#define	WT_STAT_CONN_TXN_READ_QUEUE_HEAD		1354
+#define	WT_STAT_CONN_TXN_READ_QUEUE_HEAD		1356
 /*! transaction: read timestamp queue inserts total */
-#define	WT_STAT_CONN_TXN_READ_QUEUE_INSERTS		1355
+#define	WT_STAT_CONN_TXN_READ_QUEUE_INSERTS		1357
 /*! transaction: read timestamp queue length */
-#define	WT_STAT_CONN_TXN_READ_QUEUE_LEN			1356
+#define	WT_STAT_CONN_TXN_READ_QUEUE_LEN			1358
 /*! transaction: rollback to stable calls */
-#define	WT_STAT_CONN_TXN_ROLLBACK_TO_STABLE		1357
+#define	WT_STAT_CONN_TXN_ROLLBACK_TO_STABLE		1359
 /*! transaction: rollback to stable updates aborted */
-#define	WT_STAT_CONN_TXN_ROLLBACK_UPD_ABORTED		1358
+#define	WT_STAT_CONN_TXN_ROLLBACK_UPD_ABORTED		1360
 /*! transaction: rollback to stable updates removed from cache overflow */
-#define	WT_STAT_CONN_TXN_ROLLBACK_LAS_REMOVED		1359
+#define	WT_STAT_CONN_TXN_ROLLBACK_LAS_REMOVED		1361
 /*! transaction: set timestamp calls */
-#define	WT_STAT_CONN_TXN_SET_TS				1360
+#define	WT_STAT_CONN_TXN_SET_TS				1362
 /*! transaction: set timestamp commit calls */
-#define	WT_STAT_CONN_TXN_SET_TS_COMMIT			1361
+#define	WT_STAT_CONN_TXN_SET_TS_COMMIT			1363
 /*! transaction: set timestamp commit updates */
-#define	WT_STAT_CONN_TXN_SET_TS_COMMIT_UPD		1362
+#define	WT_STAT_CONN_TXN_SET_TS_COMMIT_UPD		1364
 /*! transaction: set timestamp oldest calls */
-#define	WT_STAT_CONN_TXN_SET_TS_OLDEST			1363
+#define	WT_STAT_CONN_TXN_SET_TS_OLDEST			1365
 /*! transaction: set timestamp oldest updates */
-#define	WT_STAT_CONN_TXN_SET_TS_OLDEST_UPD		1364
+#define	WT_STAT_CONN_TXN_SET_TS_OLDEST_UPD		1366
 /*! transaction: set timestamp stable calls */
-#define	WT_STAT_CONN_TXN_SET_TS_STABLE			1365
+#define	WT_STAT_CONN_TXN_SET_TS_STABLE			1367
 /*! transaction: set timestamp stable updates */
-#define	WT_STAT_CONN_TXN_SET_TS_STABLE_UPD		1366
+#define	WT_STAT_CONN_TXN_SET_TS_STABLE_UPD		1368
 /*! transaction: transaction begins */
-#define	WT_STAT_CONN_TXN_BEGIN				1367
+#define	WT_STAT_CONN_TXN_BEGIN				1369
 /*! transaction: transaction checkpoint currently running */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_RUNNING		1368
+#define	WT_STAT_CONN_TXN_CHECKPOINT_RUNNING		1370
 /*! transaction: transaction checkpoint generation */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_GENERATION		1369
+#define	WT_STAT_CONN_TXN_CHECKPOINT_GENERATION		1371
 /*! transaction: transaction checkpoint max time (msecs) */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_MAX		1370
+#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_MAX		1372
 /*! transaction: transaction checkpoint min time (msecs) */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_MIN		1371
+#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_MIN		1373
 /*! transaction: transaction checkpoint most recent time (msecs) */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_RECENT		1372
+#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_RECENT		1374
 /*! transaction: transaction checkpoint scrub dirty target */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_SCRUB_TARGET	1373
+#define	WT_STAT_CONN_TXN_CHECKPOINT_SCRUB_TARGET	1375
 /*! transaction: transaction checkpoint scrub time (msecs) */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_SCRUB_TIME		1374
+#define	WT_STAT_CONN_TXN_CHECKPOINT_SCRUB_TIME		1376
 /*! transaction: transaction checkpoint total time (msecs) */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_TOTAL		1375
+#define	WT_STAT_CONN_TXN_CHECKPOINT_TIME_TOTAL		1377
 /*! transaction: transaction checkpoints */
-#define	WT_STAT_CONN_TXN_CHECKPOINT			1376
+#define	WT_STAT_CONN_TXN_CHECKPOINT			1378
 /*!
  * transaction: transaction checkpoints skipped because database was
  * clean
  */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_SKIPPED		1377
+#define	WT_STAT_CONN_TXN_CHECKPOINT_SKIPPED		1379
 /*! transaction: transaction failures due to cache overflow */
-#define	WT_STAT_CONN_TXN_FAIL_CACHE			1378
+#define	WT_STAT_CONN_TXN_FAIL_CACHE			1380
 /*!
  * transaction: transaction fsync calls for checkpoint after allocating
  * the transaction ID
  */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_FSYNC_POST		1379
+#define	WT_STAT_CONN_TXN_CHECKPOINT_FSYNC_POST		1381
 /*!
  * transaction: transaction fsync duration for checkpoint after
  * allocating the transaction ID (usecs)
  */
-#define	WT_STAT_CONN_TXN_CHECKPOINT_FSYNC_POST_DURATION	1380
+#define	WT_STAT_CONN_TXN_CHECKPOINT_FSYNC_POST_DURATION	1382
 /*! transaction: transaction range of IDs currently pinned */
-#define	WT_STAT_CONN_TXN_PINNED_RANGE			1381
+#define	WT_STAT_CONN_TXN_PINNED_RANGE			1383
 /*! transaction: transaction range of IDs currently pinned by a checkpoint */
-#define	WT_STAT_CONN_TXN_PINNED_CHECKPOINT_RANGE	1382
+#define	WT_STAT_CONN_TXN_PINNED_CHECKPOINT_RANGE	1384
 /*!
  * transaction: transaction range of IDs currently pinned by named
  * snapshots
  */
-#define	WT_STAT_CONN_TXN_PINNED_SNAPSHOT_RANGE		1383
+#define	WT_STAT_CONN_TXN_PINNED_SNAPSHOT_RANGE		1385
 /*! transaction: transaction range of timestamps currently pinned */
-#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP		1384
+#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP		1386
 /*! transaction: transaction range of timestamps pinned by a checkpoint */
-#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP_CHECKPOINT	1385
+#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP_CHECKPOINT	1387
 /*!
  * transaction: transaction range of timestamps pinned by the oldest
  * active read timestamp
  */
-#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP_READER	1386
+#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP_READER	1388
 /*!
  * transaction: transaction range of timestamps pinned by the oldest
  * timestamp
  */
-#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP_OLDEST	1387
+#define	WT_STAT_CONN_TXN_PINNED_TIMESTAMP_OLDEST	1389
 /*! transaction: transaction read timestamp of the oldest active reader */
-#define	WT_STAT_CONN_TXN_TIMESTAMP_OLDEST_ACTIVE_READ	1388
+#define	WT_STAT_CONN_TXN_TIMESTAMP_OLDEST_ACTIVE_READ	1390
 /*! transaction: transaction sync calls */
-#define	WT_STAT_CONN_TXN_SYNC				1389
+#define	WT_STAT_CONN_TXN_SYNC				1391
 /*! transaction: transactions committed */
-#define	WT_STAT_CONN_TXN_COMMIT				1390
+#define	WT_STAT_CONN_TXN_COMMIT				1392
 /*! transaction: transactions rolled back */
-#define	WT_STAT_CONN_TXN_ROLLBACK			1391
+#define	WT_STAT_CONN_TXN_ROLLBACK			1393
 /*! transaction: update conflicts */
-#define	WT_STAT_CONN_TXN_UPDATE_CONFLICT		1392
+#define	WT_STAT_CONN_TXN_UPDATE_CONFLICT		1394
 
 /*!
  * @}
diff --git a/src/third_party/wiredtiger/src/include/wt_internal.h b/src/third_party/wiredtiger/src/include/wt_internal.h
index 8f18828d59b..5d2205f7718 100644
--- a/src/third_party/wiredtiger/src/include/wt_internal.h
+++ b/src/third_party/wiredtiger/src/include/wt_internal.h
@@ -407,17 +407,18 @@ typedef uint64_t wt_timestamp_t;
 #endif
 #include "verify_build.h"
 
+#include "cache.i"			/* required by misc.i */
 #include "ctype.i"			/* required by packing.i */
 #include "intpack.i"			/* required by cell.i, packing.i */
 #include "misc.i"			/* required by mutex.i */
 
 #include "buf.i"                        /* required by cell.i */
-#include "cache.i"			/* required by txn.i */
 #include "cell.i"			/* required by btree.i */
 #include "mutex.i"			/* required by btree.i */
 #include "txn.i"			/* required by btree.i */
 
 #include "bitstring.i"
+#include "block.i"
 #include "btree.i"			/* required by cursor.i */
 #include "btree_cmp.i"
 #include "column.i"
diff --git a/src/third_party/wiredtiger/src/meta/meta_ckpt.c b/src/third_party/wiredtiger/src/meta/meta_ckpt.c
index 9ac9aa11994..7b0f9a3e621 100644
--- a/src/third_party/wiredtiger/src/meta/meta_ckpt.c
+++ b/src/third_party/wiredtiger/src/meta/meta_ckpt.c
@@ -8,14 +8,14 @@
 
 #include "wt_internal.h"
 
-static int  __ckpt_last(WT_SESSION_IMPL *, const char *, WT_CKPT *);
-static int  __ckpt_last_name(WT_SESSION_IMPL *, const char *, const char **);
-static int  __ckpt_load(WT_SESSION_IMPL *,
+static int __ckpt_last(WT_SESSION_IMPL *, const char *, WT_CKPT *);
+static int __ckpt_last_name(WT_SESSION_IMPL *, const char *, const char **);
+static int __ckpt_load(WT_SESSION_IMPL *,
 		WT_CONFIG_ITEM *, WT_CONFIG_ITEM *, WT_CKPT *);
-static int  __ckpt_named(
+static int __ckpt_named(
 		WT_SESSION_IMPL *, const char *, const char *, WT_CKPT *);
-static int  __ckpt_set(WT_SESSION_IMPL *, const char *, const char *);
-static int  __ckpt_version_chk(WT_SESSION_IMPL *, const char *, const char *);
+static int __ckpt_set(WT_SESSION_IMPL *, const char *, const char *);
+static int __ckpt_version_chk(WT_SESSION_IMPL *, const char *, const char *);
 
 /*
  * __wt_meta_checkpoint --
@@ -229,6 +229,83 @@ err:		__wt_free(session, *namep);
 }
 
 /*
+ * __wt_meta_block_metadata --
+ *	Build a version of the file's metadata for the block manager to store.
+ */
+int
+__wt_meta_block_metadata(
+    WT_SESSION_IMPL *session, const char *config, WT_CKPT *ckpt)
+{
+	WT_CONFIG_ITEM cval;
+	WT_DECL_ITEM(a);
+	WT_DECL_ITEM(b);
+	WT_DECL_RET;
+	WT_KEYED_ENCRYPTOR *kencryptor;
+	size_t encrypt_size, metadata_len;
+	const char *metadata, *filecfg[] = {
+	    WT_CONFIG_BASE(session, file_meta), NULL, NULL };
+	char *min_config;
+
+	min_config = NULL;
+	WT_ERR(__wt_scr_alloc(session, 0, &a));
+	WT_ERR(__wt_scr_alloc(session, 0, &b));
+
+	/*
+	 * The metadata has to be encrypted because it contains private data
+	 * (for example, column names). We pass the block manager text that
+	 * describes the metadata (the encryption information), and the
+	 * possibly encrypted metadata encoded as a hexadecimal string.
+	 * configuration string.
+	 *
+	 * Get a minimal configuration string, just the non-default entries.
+	 */
+	WT_ERR(__wt_config_discard_defaults(
+	    session, filecfg, config, &min_config));
+
+	/* Fill out the configuration array for normal retrieval. */
+	filecfg[1] = config;
+
+	/*
+	 * Find out if this file is encrypted. If encrypting, encrypt and encode
+	 * the minimal configuration.
+	 */
+	WT_ERR(__wt_btree_config_encryptor(session, filecfg, &kencryptor));
+	if (kencryptor == NULL) {
+		metadata = min_config;
+		metadata_len = strlen(min_config);
+	} else {
+		__wt_buf_set(session, a, min_config, strlen(min_config));
+		__wt_encrypt_size(session, kencryptor, a->size, &encrypt_size);
+		WT_ERR(__wt_buf_grow(session, b, encrypt_size));
+		WT_ERR(__wt_encrypt(session, kencryptor, 0, a, b));
+		WT_ERR(__wt_buf_grow(session, a, b->size * 2));
+		__wt_fill_hex(b->mem, b->size, a->mem, a->memsize, &a->size);
+
+		metadata = a->data;
+		metadata_len = a->size;
+	}
+
+	/*
+	 * Get a copy of the encryption information and flag if we're doing
+	 * encryption. The latter isn't necessary, but it makes it easier to
+	 * diagnose issues during the load.
+	 */
+	WT_ERR(__wt_config_gets(session, filecfg, "encryption", &cval));
+	WT_ERR(__wt_buf_fmt(session, b,
+	    "encryption=%.*s,"
+	    "block_metadata_encrypted=%s,block_metadata=[%.*s]",
+	    (int)cval.len, cval.str, kencryptor == NULL ? "false" : "true",
+	    (int)metadata_len, metadata));
+	WT_ERR(__wt_strndup(session, b->data, b->size, &ckpt->block_metadata));
+
+err:
+	__wt_free(session, min_config);
+	__wt_scr_free(session, &a);
+	__wt_scr_free(session, &b);
+	return (ret);
+}
+
+/*
  * __ckpt_compare_order --
  *	Qsort comparison routine for the checkpoint list.
  */
@@ -248,15 +325,15 @@ __ckpt_compare_order(const void *a, const void *b)
  *	Load all available checkpoint information for a file.
  */
 int
-__wt_meta_ckptlist_get(
-    WT_SESSION_IMPL *session, const char *fname, WT_CKPT **ckptbasep)
+__wt_meta_ckptlist_get(WT_SESSION_IMPL *session,
+    const char *fname, bool update, WT_CKPT **ckptbasep)
 {
 	WT_CKPT *ckpt, *ckptbase;
 	WT_CONFIG ckptconf;
 	WT_CONFIG_ITEM k, v;
-	WT_DECL_ITEM(buf);
 	WT_DECL_RET;
 	size_t allocated, slot;
+	int64_t maxorder;
 	char *config;
 
 	*ckptbasep = NULL;
@@ -269,8 +346,8 @@ __wt_meta_ckptlist_get(
 	WT_RET(__wt_metadata_search(session, fname, &config));
 
 	/* Load any existing checkpoints into the array. */
-	WT_ERR(__wt_scr_alloc(session, 0, &buf));
-	if (__wt_config_getones(session, config, "checkpoint", &v) == 0) {
+	if ((ret =
+	    __wt_config_getones(session, config, "checkpoint", &v)) == 0) {
 		__wt_config_subinit(session, &ckptconf, &v);
 		for (; __wt_config_next(&ckptconf, &k, &v) == 0; ++slot) {
 			WT_ERR(__wt_realloc_def(
@@ -280,22 +357,42 @@ __wt_meta_ckptlist_get(
 			WT_ERR(__ckpt_load(session, &k, &v, ckpt));
 		}
 	}
-
-	/*
-	 * Allocate an extra slot for a new value, plus a slot to mark the end.
-	 *
-	 * This isn't very clean, but there's necessary cooperation between the
-	 * schema layer (that maintains the list of checkpoints), the btree
-	 * layer (that knows when the root page is written, creating a new
-	 * checkpoint), and the block manager (which actually creates the
-	 * checkpoint).  All of that cooperation is handled in the WT_CKPT
-	 * structure referenced from the WT_BTREE structure.
-	 */
-	WT_ERR(__wt_realloc_def(session, &allocated, slot + 2, &ckptbase));
+	WT_ERR_NOTFOUND_OK(ret);
+	if (!update && slot == 0)
+		WT_ERR(WT_NOTFOUND);
 
 	/* Sort in creation-order. */
 	__wt_qsort(ckptbase, slot, sizeof(WT_CKPT), __ckpt_compare_order);
 
+	if (update) {
+		/*
+		 * Allocate an extra slot for a new value, plus a slot to mark
+		 * mark the end.
+		 *
+		 * This isn't clean, but there's necessary cooperation between
+		 * the schema layer (that maintains the list of checkpoints),
+		 * the btree layer (that knows when the root page is written,
+		 * creating a new checkpoint), and the block manager (which
+		 * actually creates the checkpoint). All of that cooperation is
+		 * handled in the array of checkpoint structures referenced from
+		 * the WT_BTREE structure.
+		 */
+		WT_ERR(__wt_realloc_def(
+		    session, &allocated, slot + 2, &ckptbase));
+
+		/* The caller may be adding a value, initialize it. */
+		maxorder = 0;
+		WT_CKPT_FOREACH(ckptbase, ckpt)
+			if (ckpt->order > maxorder)
+				maxorder = ckpt->order;
+		ckpt->order = maxorder + 1;
+		__wt_seconds(session, &ckpt->sec);
+
+		WT_ERR(__wt_meta_block_metadata(session, config, ckpt));
+
+		F_SET(ckpt, WT_CKPT_ADD);
+	}
+
 	/* Return the array to our caller. */
 	*ckptbasep = ckptbase;
 
@@ -303,7 +400,6 @@ __wt_meta_ckptlist_get(
 err:		__wt_meta_ckptlist_free(session, &ckptbase);
 	}
 	__wt_free(session, config);
-	__wt_scr_free(session, &buf);
 
 	return (ret);
 }
@@ -362,7 +458,7 @@ __ckpt_load(WT_SESSION_IMPL *session,
 	ret = __wt_config_subgets(session, v, "oldest_start_txn", &a);
 	WT_RET_NOTFOUND_OK(ret);
 	ckpt->oldest_start_txn =
-	    ret == WT_NOTFOUND || a.len == 0 ? WT_TS_NONE : (uint64_t)a.val;
+	    ret == WT_NOTFOUND || a.len == 0 ? WT_TXN_NONE : (uint64_t)a.val;
 	ret = __wt_config_subgets(session, v, "newest_stop_ts", &a);
 	WT_RET_NOTFOUND_OK(ret);
 	ckpt->newest_stop_ts =
@@ -370,7 +466,7 @@ __ckpt_load(WT_SESSION_IMPL *session,
 	ret = __wt_config_subgets(session, v, "newest_stop_txn", &a);
 	WT_RET_NOTFOUND_OK(ret);
 	ckpt->newest_stop_txn =
-	    ret == WT_NOTFOUND || a.len == 0 ? WT_TS_MAX : (uint64_t)a.val;
+	    ret == WT_NOTFOUND || a.len == 0 ? WT_TXN_MAX : (uint64_t)a.val;
 	__wt_check_addr_validity(session,
 	    ckpt->oldest_start_ts, ckpt->oldest_start_txn,
 	    ckpt->newest_stop_ts, ckpt->newest_stop_txn);
@@ -443,45 +539,24 @@ __ckptlist_review_write_gen(WT_SESSION_IMPL *session, WT_CKPT *ckpt)
 	 * If checkpointing the metadata file, update its write generation to
 	 * be the maximum we've seen.
 	 */
-	if (WT_IS_METADATA(session->dhandle) && ckpt->write_gen < v)
+	if (session->dhandle != NULL &&
+	    WT_IS_METADATA(session->dhandle) && ckpt->write_gen < v)
 		ckpt->write_gen = v;
 }
 
 /*
- * __wt_meta_ckptlist_set --
- *	Set a file's checkpoint value from the WT_CKPT list.
+ * __wt_meta_ckptlist_to_meta --
+ *	Convert a checkpoint list into its metadata representation.
  */
 int
-__wt_meta_ckptlist_set(WT_SESSION_IMPL *session,
-    const char *fname, WT_CKPT *ckptbase, WT_LSN *ckptlsn)
+__wt_meta_ckptlist_to_meta(
+    WT_SESSION_IMPL *session, WT_CKPT *ckptbase, WT_ITEM *buf)
 {
 	WT_CKPT *ckpt;
-	WT_DECL_ITEM(buf);
-	WT_DECL_RET;
-	int64_t maxorder;
 	const char *sep;
 
-	/*
-	 * Each internal checkpoint name is appended with a generation to make
-	 * it a unique name.  We're solving two problems: when two checkpoints
-	 * are taken quickly, the timer may not be unique and/or we can even
-	 * see time travel on the second checkpoint if we snapshot in-between
-	 * nanoseconds rolling over. Second, if we reset the generational
-	 * counter when new checkpoints arrive, we could logically re-create
-	 * specific checkpoints, racing with cursors open on those checkpoints.
-	 * I can't think of any way to return incorrect results by racing with
-	 * those cursors, but it's simpler not to worry about it.
-	 *
-	 * Determine the current maximum checkpoint generation.
-	 */
-	maxorder = 0;
-	WT_CKPT_FOREACH(ckptbase, ckpt)
-		if (ckpt->order > maxorder)
-			maxorder = ckpt->order;
-
-	WT_ERR(__wt_scr_alloc(session, 0, &buf));
 	sep = "";
-	WT_ERR(__wt_buf_fmt(session, buf, "checkpoint=("));
+	WT_RET(__wt_buf_fmt(session, buf, "checkpoint=("));
 	WT_CKPT_FOREACH(ckptbase, ckpt) {
 		/* Skip deleted checkpoints. */
 		if (F_ISSET(ckpt, WT_CKPT_DELETE))
@@ -496,36 +571,27 @@ __wt_meta_ckptlist_set(WT_SESSION_IMPL *session,
 			if (ckpt->raw.size == 0)
 				ckpt->addr.size = 0;
 			else
-				WT_ERR(__wt_raw_to_hex(session,
+				WT_RET(__wt_raw_to_hex(session,
 				    ckpt->raw.data,
 				    ckpt->raw.size, &ckpt->addr));
-
-			/* Set the order and timestamp. */
-			if (F_ISSET(ckpt, WT_CKPT_ADD))
-				ckpt->order = ++maxorder;
-
-			__wt_seconds(session, &ckpt->sec);
 		}
 
 		__wt_check_addr_validity(session,
 		    ckpt->oldest_start_ts, ckpt->oldest_start_txn,
 		    ckpt->newest_stop_ts, ckpt->newest_stop_txn);
 
-		WT_ERR(__wt_buf_catfmt(session, buf, "%s%s", sep, ckpt->name));
+		WT_RET(__wt_buf_catfmt(session, buf, "%s%s", sep, ckpt->name));
 		sep = ",";
 
 		if (strcmp(ckpt->name, WT_CHECKPOINT) == 0)
-			WT_ERR(__wt_buf_catfmt(session, buf,
+			WT_RET(__wt_buf_catfmt(session, buf,
 			    ".%" PRId64, ckpt->order));
 
-		/* Review the checkpoint's write generation. */
-		__ckptlist_review_write_gen(session, ckpt);
-
 		/*
 		 * Use PRId64 formats: WiredTiger's configuration code handles
 		 * signed 8B values.
 		 */
-		WT_ERR(__wt_buf_catfmt(session, buf,
+		WT_RET(__wt_buf_catfmt(session, buf,
 		    "=(addr=\"%.*s\",order=%" PRId64
 		    ",time=%" PRIu64
 		    ",size=%" PRId64
@@ -546,13 +612,38 @@ __wt_meta_ckptlist_set(WT_SESSION_IMPL *session,
 		    (int64_t)ckpt->newest_stop_txn,
 		    (int64_t)ckpt->write_gen));
 	}
-	WT_ERR(__wt_buf_catfmt(session, buf, ")"));
+	WT_RET(__wt_buf_catfmt(session, buf, ")"));
+
+	return (0);
+}
+
+/*
+ * __wt_meta_ckptlist_set --
+ *	Set a file's checkpoint value from the WT_CKPT list.
+ */
+int
+__wt_meta_ckptlist_set(WT_SESSION_IMPL *session,
+    const char *fname, WT_CKPT *ckptbase, WT_LSN *ckptlsn)
+{
+	WT_CKPT *ckpt;
+	WT_DECL_ITEM(buf);
+	WT_DECL_RET;
+
+	WT_RET(__wt_scr_alloc(session, 1024, &buf));
+
+	WT_ERR(__wt_meta_ckptlist_to_meta(session, ckptbase, buf));
+
 	if (ckptlsn != NULL)
 		WT_ERR(__wt_buf_catfmt(session, buf,
 		    ",checkpoint_lsn=(%" PRIu32 ",%" PRIuMAX ")",
 		    ckptlsn->l.file, (uintmax_t)ckptlsn->l.offset));
+
 	WT_ERR(__ckpt_set(session, fname, buf->mem));
 
+	/* Review the checkpoint's write generation. */
+	WT_CKPT_FOREACH(ckptbase, ckpt)
+		__ckptlist_review_write_gen(session, ckpt);
+
 err:	__wt_scr_free(session, &buf);
 	return (ret);
 }
@@ -585,6 +676,8 @@ __wt_meta_checkpoint_free(WT_SESSION_IMPL *session, WT_CKPT *ckpt)
 		return;
 
 	__wt_free(session, ckpt->name);
+	__wt_free(session, ckpt->block_metadata);
+	__wt_free(session, ckpt->block_checkpoint);
 	__wt_buf_free(session, &ckpt->addr);
 	__wt_buf_free(session, &ckpt->raw);
 	__wt_free(session, ckpt->bpriv);
diff --git a/src/third_party/wiredtiger/src/meta/meta_ext.c b/src/third_party/wiredtiger/src/meta/meta_ext.c
index 9404bd016a0..80d0d7c2d5a 100644
--- a/src/third_party/wiredtiger/src/meta/meta_ext.c
+++ b/src/third_party/wiredtiger/src/meta/meta_ext.c
@@ -91,7 +91,7 @@ __wt_metadata_get_ckptlist(
     WT_GCC_FUNC_ATTRIBUTE((visibility("default")))
 {
 	return (__wt_meta_ckptlist_get(
-	    (WT_SESSION_IMPL *)session, name, ckptbasep));
+	    (WT_SESSION_IMPL *)session, name, false, ckptbasep));
 }
 
 /*
diff --git a/src/third_party/wiredtiger/src/reconcile/rec_write.c b/src/third_party/wiredtiger/src/reconcile/rec_write.c
index 84f07e317ff..51cabeda029 100644
--- a/src/third_party/wiredtiger/src/reconcile/rec_write.c
+++ b/src/third_party/wiredtiger/src/reconcile/rec_write.c
@@ -9,6 +9,7 @@
 #include "wt_internal.h"
 
 static void __rec_cleanup(WT_SESSION_IMPL *, WT_RECONCILE *);
+static void __rec_destroy(WT_SESSION_IMPL *, void *);
 static int  __rec_destroy_session(WT_SESSION_IMPL *);
 static int  __rec_init(WT_SESSION_IMPL *,
 		WT_REF *, uint32_t, WT_SALVAGE_COOKIE *, void *);
@@ -513,6 +514,7 @@ __rec_init(WT_SESSION_IMPL *session,
     WT_REF *ref, uint32_t flags, WT_SALVAGE_COOKIE *salvage, void *reconcilep)
 {
 	WT_BTREE *btree;
+	WT_DECL_RET;
 	WT_PAGE *page;
 	WT_RECONCILE *r;
 	WT_TXN_GLOBAL *txn_global;
@@ -522,8 +524,6 @@ __rec_init(WT_SESSION_IMPL *session,
 
 	if ((r = *(WT_RECONCILE **)reconcilep) == NULL) {
 		WT_RET(__wt_calloc_one(session, &r));
-
-		*(WT_RECONCILE **)reconcilep = r;
 		session->reconcile_cleanup = __rec_destroy_session;
 
 		/* Connect pointers/buffers. */
@@ -575,6 +575,12 @@ __rec_init(WT_SESSION_IMPL *session,
 	 * history, or the stable timestamp hasn't changed since last time this
 	 * page was successfully, skew oldest instead.
 	 */
+	if (F_ISSET(S2C(session)->cache, WT_CACHE_EVICT_DEBUG_MODE) &&
+	    __wt_random(&session->rnd) % 3 == 0)
+		r->las_skew_newest = false;
+	else
+		r->las_skew_newest =
+		    LF_ISSET(WT_REC_LOOKASIDE) && LF_ISSET(WT_REC_VISIBLE_ALL);
 	r->las_skew_newest =
 	    LF_ISSET(WT_REC_LOOKASIDE) && LF_ISSET(WT_REC_VISIBLE_ALL);
 	if (r->las_skew_newest &&
@@ -675,7 +681,7 @@ __rec_init(WT_SESSION_IMPL *session,
 	 * Sanity check the size: 100 slots is the smallest dictionary we use.
 	 */
 	if (btree->dictionary != 0 && btree->dictionary > r->dictionary_slots)
-		WT_RET(__wt_rec_dictionary_init(session,
+		WT_ERR(__wt_rec_dictionary_init(session,
 		    r, btree->dictionary < 100 ? 100 : btree->dictionary));
 	__wt_rec_dictionary_reset(r);
 
@@ -716,7 +722,20 @@ __rec_init(WT_SESSION_IMPL *session,
 	r->update_modify_cbt.ref = ref;
 	r->update_modify_cbt.iface.value_format = btree->value_format;
 
-	return (0);
+	/*
+	 * If we allocated the reconciliation structure and there was an error,
+	 * clean up. If our caller passed in a structure, they own it.
+	 */
+err:	if (*(WT_RECONCILE **)reconcilep == NULL) {
+		if (ret == 0)
+			*(WT_RECONCILE **)reconcilep = r;
+		else {
+			__rec_cleanup(session, r);
+			__rec_destroy(session, &r);
+		}
+	}
+
+	return (ret);
 }
 
 /*
@@ -2139,6 +2158,7 @@ int
 __wt_bulk_wrapup(WT_SESSION_IMPL *session, WT_CURSOR_BULK *cbulk)
 {
 	WT_BTREE *btree;
+	WT_DECL_RET;
 	WT_PAGE *parent;
 	WT_RECONCILE *r;
 
@@ -2155,25 +2175,25 @@ __wt_bulk_wrapup(WT_SESSION_IMPL *session, WT_CURSOR_BULK *cbulk)
 		break;
 	case BTREE_COL_VAR:
 		if (cbulk->rle != 0)
-			WT_RET(__wt_bulk_insert_var(session, cbulk, false));
+			WT_ERR(__wt_bulk_insert_var(session, cbulk, false));
 		break;
 	case BTREE_ROW:
 		break;
 	}
 
-	WT_RET(__wt_rec_split_finish(session, r));
-	WT_RET(__rec_write_wrapup(session, r, r->page));
+	WT_ERR(__wt_rec_split_finish(session, r));
+	WT_ERR(__rec_write_wrapup(session, r, r->page));
 	__rec_write_page_status(session, r);
 
 	/* Mark the page's parent and the tree dirty. */
 	parent = r->ref->home;
-	WT_RET(__wt_page_modify_init(session, parent));
+	WT_ERR(__wt_page_modify_init(session, parent));
 	__wt_page_modify_set(session, parent);
 
-	__rec_cleanup(session, r);
+err:	__rec_cleanup(session, r);
 	__rec_destroy(session, &cbulk->reconcile);
 
-	return (0);
+	return (ret);
 }
 
 /*
@@ -2373,11 +2393,11 @@ __rec_write_wrapup(WT_SESSION_IMPL *session, WT_RECONCILE *r, WT_PAGE *page)
 		 */
 		ref = r->ref;
 		if (__wt_ref_is_root(ref)) {
-			WT_RET(bm->checkpoint(
-			    bm, session, NULL, btree->ckpt, false));
 			__wt_checkpoint_tree_reconcile_update(session,
 			    WT_TS_NONE, WT_TS_NONE, WT_TXN_NONE,
 			    WT_TS_MAX, WT_TXN_MAX);
+			WT_RET(bm->checkpoint(
+			    bm, session, NULL, btree->ckpt, false));
 		}
 
 		/*
@@ -2419,16 +2439,16 @@ __rec_write_wrapup(WT_SESSION_IMPL *session, WT_RECONCILE *r, WT_PAGE *page)
 			r->multi->disk_image = NULL;
 			mod->mod_page_las = r->multi->page_las;
 		} else {
-			WT_RET(__wt_bt_write(session, r->wrapup_checkpoint,
-			    NULL, NULL, NULL,
-			    true, F_ISSET(r, WT_REC_CHECKPOINT),
-			    r->wrapup_checkpoint_compressed));
 			__wt_checkpoint_tree_reconcile_update(session,
 			    r->multi->addr.newest_durable_ts,
 			    r->multi->addr.oldest_start_ts,
 			    r->multi->addr.oldest_start_txn,
 			    r->multi->addr.newest_stop_ts,
 			    r->multi->addr.newest_stop_txn);
+			WT_RET(__wt_bt_write(session, r->wrapup_checkpoint,
+			    NULL, NULL, NULL,
+			    true, F_ISSET(r, WT_REC_CHECKPOINT),
+			    r->wrapup_checkpoint_compressed));
 		}
 
 		mod->rec_result = WT_PM_REC_REPLACE;
diff --git a/src/third_party/wiredtiger/src/session/session_api.c b/src/third_party/wiredtiger/src/session/session_api.c
index 7d3b4b9d81a..4e1742a89db 100644
--- a/src/third_party/wiredtiger/src/session/session_api.c
+++ b/src/third_party/wiredtiger/src/session/session_api.c
@@ -1115,6 +1115,65 @@ err:	API_END_RET(session, ret);
 }
 
 /*
+ * __session_import --
+ *	WT_SESSION->import method.
+ */
+static int
+__session_import(WT_SESSION *wt_session, const char *uri, const char *config)
+{
+	WT_DECL_RET;
+	WT_SESSION_IMPL *session;
+	char *value;
+
+	WT_UNUSED(config);
+
+	session = (WT_SESSION_IMPL *)wt_session;
+	SESSION_API_CALL_NOCONF(session, import);
+
+	WT_ERR(__wt_inmem_unsupported_op(session, NULL));
+
+	if (!WT_PREFIX_MATCH(uri, "file:"))
+		WT_ERR(__wt_bad_object_type(session, uri));
+
+	if ((ret = __wt_metadata_search(session, uri, &value)) == 0)
+		WT_ERR_MSG(session, EINVAL,
+		    "an object named \"%s\" already exists in the database",
+		    uri);
+	WT_ERR_NOTFOUND_OK(ret);
+
+	WT_ERR(__wt_import(session, uri));
+
+err:
+	if (ret != 0)
+		WT_STAT_CONN_INCR(session, session_table_import_fail);
+	else
+		WT_STAT_CONN_INCR(session, session_table_import_success);
+	API_END_RET_NOTFOUND_MAP(session, ret);
+}
+
+/*
+ * __session_import_readonly --
+ *	WT_SESSION->import method; readonly version.
+ */
+static int
+__session_import_readonly(
+    WT_SESSION *wt_session, const char *uri, const char *config)
+{
+	WT_DECL_RET;
+	WT_SESSION_IMPL *session;
+
+	WT_UNUSED(uri);
+	WT_UNUSED(config);
+
+	session = (WT_SESSION_IMPL *)wt_session;
+	SESSION_API_CALL_NOCONF(session, import);
+
+	WT_STAT_CONN_INCR(session, session_table_import_fail);
+	ret = __wt_session_notsup(session);
+err:	API_END_RET(session, ret);
+}
+
+/*
  * __session_join --
  *	WT_SESSION->join method.
  */
@@ -2092,6 +2151,7 @@ __open_session(WT_CONNECTION_IMPL *conn,
 		__session_open_cursor,
 		__session_alter,
 		__session_create,
+		__session_import,
 		__wt_session_compact,
 		__session_drop,
 		__session_join,
@@ -2124,6 +2184,7 @@ __open_session(WT_CONNECTION_IMPL *conn,
 		__session_open_cursor,
 		__session_alter_readonly,
 		__session_create_readonly,
+		__session_import_readonly,
 		__wt_session_compact_readonly,
 		__session_drop_readonly,
 		__session_join,
diff --git a/src/third_party/wiredtiger/src/session/session_salvage.c b/src/third_party/wiredtiger/src/session/session_salvage.c
deleted file mode 100644
index 79e67475958..00000000000
--- a/src/third_party/wiredtiger/src/session/session_salvage.c
+++ /dev/null
@@ -1,59 +0,0 @@
-/*-
- * Copyright (c) 2014-2019 MongoDB, Inc.
- * Copyright (c) 2008-2014 WiredTiger, Inc.
- *	All rights reserved.
- *
- * See the file LICENSE for redistribution information.
- */
-
-#include "wt_internal.h"
-
-/*
- * __wt_salvage --
- *	Salvage a single file.
- */
-int
-__wt_salvage(WT_SESSION_IMPL *session, const char *cfg[])
-{
-	WT_CKPT *ckptbase;
-	WT_DATA_HANDLE *dhandle;
-	WT_DECL_RET;
-
-	dhandle = session->dhandle;
-
-	/*
-	 * XXX
-	 * The salvage process reads and discards previous checkpoints, so the
-	 * underlying block manager has to ignore any previous checkpoint
-	 * entries when creating a new checkpoint, in other words, we can't use
-	 * the metadata checkpoint list, it has all of those checkpoint listed
-	 * and we don't care about them.  Build a clean checkpoint list and use
-	 * it instead.
-	 *
-	 * Don't first clear the metadata checkpoint list and call the function
-	 * to get a list of checkpoints: a crash between clearing the metadata
-	 * checkpoint list and creating a new checkpoint list would look like a
-	 * create or open of a file without a checkpoint to roll-forward from,
-	 * and the contents of the file would be discarded.
-	 */
-	WT_RET(__wt_calloc_def(session, 2, &ckptbase));
-	WT_ERR(__wt_strdup(session, WT_CHECKPOINT, &ckptbase[0].name));
-	F_SET(&ckptbase[0], WT_CKPT_ADD);
-
-	WT_ERR(__wt_bt_salvage(session, ckptbase, cfg));
-
-	/*
-	 * If no checkpoint was created, well, it's probably bad news, but there
-	 * is nothing to do but clear any recorded checkpoints for the file.  If
-	 * a checkpoint was created, life is good, replace any existing list of
-	 * checkpoints with the single new one.
-	 */
-	if (ckptbase[0].raw.data == NULL)
-		WT_ERR(__wt_meta_checkpoint_clear(session, dhandle->name));
-	else
-		WT_ERR(__wt_meta_ckptlist_set(
-		    session, dhandle->name, ckptbase, NULL));
-
-err:	__wt_meta_ckptlist_free(session, &ckptbase);
-	return (ret);
-}
diff --git a/src/third_party/wiredtiger/src/support/huffman.c b/src/third_party/wiredtiger/src/support/huffman.c
index b7bd9e24bb6..85e0800e170 100644
--- a/src/third_party/wiredtiger/src/support/huffman.c
+++ b/src/third_party/wiredtiger/src/support/huffman.c
@@ -261,8 +261,9 @@ static void
 make_table(WT_SESSION_IMPL *session, uint8_t *code2symbol,
     uint16_t max_depth, WT_HUFFMAN_CODE *codes, u_int symcnt)
 {
+	u_int i;
 	uint32_t j, c1, c2;	/* Exceeds uint16_t bounds at loop boundary. */
-	uint16_t c, i;
+	uint16_t c;
 	uint8_t len, shift;
 
 	/* Zero out, for assertion below. */
@@ -321,8 +322,8 @@ __wt_huffman_open(WT_SESSION_IMPL *session,
 	WT_DECL_RET;
 	WT_FREQTREE_NODE *node, *node2, **refnode, *tempnode;
 	WT_HUFFMAN_OBJ *huffman;
+	u_int i;
 	uint64_t w1, w2;
-	uint16_t i;
 
 	indexed_freqs = NULL;
 	combined_nodes = leaves = NULL;
diff --git a/src/third_party/wiredtiger/src/support/stat.c b/src/third_party/wiredtiger/src/support/stat.c
index 32241675a9e..e76930c3b38 100644
--- a/src/third_party/wiredtiger/src/support/stat.c
+++ b/src/third_party/wiredtiger/src/support/stat.c
@@ -1074,6 +1074,8 @@ static const char * const __stats_connection_desc[] = {
 	"session: table create successful calls",
 	"session: table drop failed calls",
 	"session: table drop successful calls",
+	"session: table import failed calls",
+	"session: table import successful calls",
 	"session: table rebalance failed calls",
 	"session: table rebalance successful calls",
 	"session: table rename failed calls",
@@ -1509,6 +1511,8 @@ __wt_stat_connection_clear_single(WT_CONNECTION_STATS *stats)
 		/* not clearing session_table_create_success */
 		/* not clearing session_table_drop_fail */
 		/* not clearing session_table_drop_success */
+		/* not clearing session_table_import_fail */
+		/* not clearing session_table_import_success */
 		/* not clearing session_table_rebalance_fail */
 		/* not clearing session_table_rebalance_success */
 		/* not clearing session_table_rename_fail */
@@ -2064,6 +2068,10 @@ __wt_stat_connection_aggregate(
 	    WT_STAT_READ(from, session_table_drop_fail);
 	to->session_table_drop_success +=
 	    WT_STAT_READ(from, session_table_drop_success);
+	to->session_table_import_fail +=
+	    WT_STAT_READ(from, session_table_import_fail);
+	to->session_table_import_success +=
+	    WT_STAT_READ(from, session_table_import_success);
 	to->session_table_rebalance_fail +=
 	    WT_STAT_READ(from, session_table_rebalance_fail);
 	to->session_table_rebalance_success +=
diff --git a/src/third_party/wiredtiger/src/txn/txn.c b/src/third_party/wiredtiger/src/txn/txn.c
index 4056d33a2b7..2449c1ccabe 100644
--- a/src/third_party/wiredtiger/src/txn/txn.c
+++ b/src/third_party/wiredtiger/src/txn/txn.c
@@ -529,9 +529,11 @@ __wt_txn_config(WT_SESSION_IMPL *session, const char *cfg[])
 
 	/* Check if prepared updates should be ignored during reads. */
 	WT_RET(__wt_config_gets_def(session, cfg, "ignore_prepare", 0, &cval));
-	if (cval.val ||
-	    (cval.len > 0 && WT_STRING_MATCH("force", cval.str, cval.len)))
+	if (cval.len > 0 &&
+	    WT_STRING_MATCH("force", cval.str, cval.len))
 		F_SET(txn, WT_TXN_IGNORE_PREPARE);
+	else if (cval.val)
+		F_SET(txn, WT_TXN_IGNORE_PREPARE | WT_TXN_READONLY);
 
 	/*
 	 * Check if the prepare timestamp and the commit timestamp of a
@@ -636,9 +638,6 @@ __wt_txn_release(WT_SESSION_IMPL *session)
 	 */
 	__wt_txn_release_snapshot(session);
 	txn->isolation = session->isolation;
-#ifdef HAVE_DIAGNOSTIC
-	txn->multi_update_count = 0;
-#endif
 
 	txn->rollback_reason = NULL;
 
@@ -801,6 +800,7 @@ __wt_txn_commit(WT_SESSION_IMPL *session, const char *cfg[])
 	WT_TXN_OP *op;
 	WT_UPDATE *upd;
 	wt_timestamp_t prev_commit_timestamp;
+	int64_t resolved_update_count, visited_update_count;
 	uint32_t fileid;
 	u_int i;
 	bool locked, prepare, readonly, update_timestamp;
@@ -810,6 +810,7 @@ __wt_txn_commit(WT_SESSION_IMPL *session, const char *cfg[])
 	txn_global = &conn->txn_global;
 	prev_commit_timestamp = 0;	/* -Wconditional-uninitialized */
 	locked = false;
+	resolved_update_count = visited_update_count = 0;
 
 	WT_ASSERT(session, F_ISSET(txn, WT_TXN_RUNNING));
 	WT_ASSERT(session, !F_ISSET(txn, WT_TXN_ERROR) ||
@@ -978,8 +979,27 @@ __wt_txn_commit(WT_SESSION_IMPL *session, const char *cfg[])
 
 				__wt_txn_op_set_timestamp(session, op);
 			} else {
-				WT_ERR(__wt_txn_resolve_prepared_op(
-				    session, op, true));
+				visited_update_count++;
+				/*
+				 * If we have set the key repeated flag
+				 * we can skip resolving prepared updates as
+				 * it would have happened on a previous
+				 * modification in this txn.
+				 */
+				if (!F_ISSET(op, WT_TXN_OP_KEY_REPEATED))
+					WT_ERR(__wt_txn_resolve_prepared_op(
+					    session, op, true,
+					    &resolved_update_count));
+				/*
+				 * We should resolve at least one or more
+				 * updates each time we call
+				 * __wt_txn_resolve_prepared_op, as such
+				 * resolved update count should never be less
+				 * than visited update count.
+				 */
+				WT_ASSERT(session,
+				    resolved_update_count >=
+				    visited_update_count);
 			}
 
 			break;
@@ -994,12 +1014,10 @@ __wt_txn_commit(WT_SESSION_IMPL *session, const char *cfg[])
 
 		__wt_txn_op_free(session, op);
 	}
+	WT_ASSERT(session, resolved_update_count == visited_update_count);
+	WT_STAT_CONN_INCRV(session, txn_prepared_updates_resolved,
+	    resolved_update_count);
 
-	/*
-	 * FIXME: I think we want to say that all prepared updates were
-	 * resolved.
-	 * WT_ASSERT(session, txn->multi_update_count == 0);
-	 */
 	txn->mod_count = 0;
 
 	/*
@@ -1141,6 +1159,13 @@ __wt_txn_prepare(WT_SESSION_IMPL *session, const char *cfg[])
 			WT_PUBLISH(upd->prepare_state, WT_PREPARE_INPROGRESS);
 			op->u.op_upd = NULL;
 			WT_STAT_CONN_INCR(session, txn_prepared_updates_count);
+			/*
+			 * Set the key repeated flag which tells us that we've
+			 * got multiple updates to the same key by the same txn.
+			 * This is later used in txn commit.
+			 */
+			if (upd->next != NULL && upd->txnid == upd->next->txnid)
+				F_SET(op, WT_TXN_OP_KEY_REPEATED);
 			break;
 		case WT_TXN_OP_REF_DELETE:
 			__wt_txn_op_apply_prepare_state(
@@ -1180,11 +1205,12 @@ __wt_txn_rollback(WT_SESSION_IMPL *session, const char *cfg[])
 	WT_TXN *txn;
 	WT_TXN_OP *op;
 	WT_UPDATE *upd;
+	int64_t resolved_update_count, visited_update_count;
 	u_int i;
 	bool readonly;
 
 	WT_UNUSED(cfg);
-
+	resolved_update_count = visited_update_count = 0;
 	txn = &session->txn;
 	readonly = txn->mod_count == 0;
 	WT_ASSERT(session, F_ISSET(txn, WT_TXN_RUNNING));
@@ -1218,10 +1244,29 @@ __wt_txn_rollback(WT_SESSION_IMPL *session, const char *cfg[])
 			 * Need to resolve indirect references of transaction
 			 * operation, in case of prepared transaction.
 			 */
-			if (F_ISSET(txn, WT_TXN_PREPARE))
-				WT_RET(__wt_txn_resolve_prepared_op(
-				    session, op, false));
-			else {
+			if (F_ISSET(txn, WT_TXN_PREPARE)) {
+				visited_update_count++;
+				/*
+				 * If we have set the key repeated flag
+				 * we can skip resolving prepared updates as
+				 * it would have happened on a previous
+				 * modification in this txn.
+				 */
+				if (!F_ISSET(op, WT_TXN_OP_KEY_REPEATED))
+					WT_RET(__wt_txn_resolve_prepared_op(
+					    session, op, false,
+					    &resolved_update_count));
+				/*
+				 * We should resolve at least one or more
+				 * updates each time we call
+				 * __wt_txn_resolve_prepared_op, as such
+				 * resolved update count should never be less
+				 * than visited update count.
+				 */
+				WT_ASSERT(session,
+				    resolved_update_count >=
+				    visited_update_count);
+			} else {
 				WT_ASSERT(session, upd->txnid == txn->id ||
 				    upd->txnid == WT_TXN_ABORTED);
 				upd->txnid = WT_TXN_ABORTED;
@@ -1243,6 +1288,10 @@ __wt_txn_rollback(WT_SESSION_IMPL *session, const char *cfg[])
 
 		__wt_txn_op_free(session, op);
 	}
+	WT_ASSERT(session, resolved_update_count == visited_update_count);
+	WT_STAT_CONN_INCRV(session, txn_prepared_updates_resolved,
+	    resolved_update_count);
+
 	txn->mod_count = 0;
 
 	__wt_txn_release(session);
diff --git a/src/third_party/wiredtiger/src/txn/txn_ckpt.c b/src/third_party/wiredtiger/src/txn/txn_ckpt.c
index 143bec4e445..0b4e9394f9f 100644
--- a/src/third_party/wiredtiger/src/txn/txn_ckpt.c
+++ b/src/third_party/wiredtiger/src/txn/txn_ckpt.c
@@ -1400,7 +1400,7 @@ __checkpoint_lock_dirty_tree(WT_SESSION_IMPL *session,
 	    WT_IS_METADATA(dhandle) || WT_META_TRACKING(session));
 
 	/* Get the list of checkpoints for this file. */
-	WT_RET(__wt_meta_ckptlist_get(session, dhandle->name, &ckptbase));
+	WT_RET(__wt_meta_ckptlist_get(session, dhandle->name, true, &ckptbase));
 
 	/* This may be a named checkpoint, check the configuration. */
 	cval.len = 0;
@@ -1449,16 +1449,10 @@ __checkpoint_lock_dirty_tree(WT_SESSION_IMPL *session,
 	/* Drop checkpoints with the same name as the one we're taking. */
 	__drop(ckptbase, name, strlen(name));
 
-	/* Add a new checkpoint entry at the end of the list. */
+	/* Set the name of the new entry at the end of the list. */
 	WT_CKPT_FOREACH(ckptbase, ckpt)
 		;
 	WT_ERR(__wt_strdup(session, name, &ckpt->name));
-	/*
-	 * We are now done with the local use of the name.  Free the local
-	 * allocation, if needed.
-	 */
-	__wt_free(session, name_alloc);
-	F_SET(ckpt, WT_CKPT_ADD);
 
 	/*
 	 * There is some interaction between backups and checkpoints.  Perform
@@ -1476,9 +1470,10 @@ __checkpoint_lock_dirty_tree(WT_SESSION_IMPL *session,
 	    !F_ISSET(btree, WT_BTREE_SKIP_CKPT));
 	btree->ckpt = ckptbase;
 
-	return (0);
-
-err:	__wt_meta_ckptlist_free(session, &ckptbase);
+	if (0) {
+err:
+		__wt_meta_ckptlist_free(session, &ckptbase);
+	}
 	__wt_free(session, name_alloc);
 
 	return (ret);
diff --git a/src/third_party/wiredtiger/src/txn/txn_log.c b/src/third_party/wiredtiger/src/txn/txn_log.c
index 6398cea7e4e..b9d9c26d941 100644
--- a/src/third_party/wiredtiger/src/txn/txn_log.c
+++ b/src/third_party/wiredtiger/src/txn/txn_log.c
@@ -38,6 +38,7 @@ __txn_op_log_row_key_check(WT_SESSION_IMPL *session, WT_CURSOR_BTREE *cbt)
 	if (cbt->ins == NULL) {
 		session = (WT_SESSION_IMPL *)cbt->iface.session;
 		page = cbt->ref->page;
+		WT_ASSERT(session, cbt->slot < page->entries);
 		rip = &page->pg_row[cbt->slot];
 		WT_ASSERT(session,
 		    __wt_row_leaf_key(session, page, rip, &key, false) == 0);
@@ -183,6 +184,7 @@ __wt_txn_op_free(WT_SESSION_IMPL *session, WT_TXN_OP *op)
 	(void)__wt_atomic_subi32(&op->btree->dhandle->session_inuse, 1);
 
 	op->type = WT_TXN_OP_NONE;
+	op->flags = 0;
 }
 
 /*
diff --git a/src/third_party/wiredtiger/src/txn/txn_recover.c b/src/third_party/wiredtiger/src/txn/txn_recover.c
index b68a4415e76..ff4c2b8b9cb 100644
--- a/src/third_party/wiredtiger/src/txn/txn_recover.c
+++ b/src/third_party/wiredtiger/src/txn/txn_recover.c
@@ -457,6 +457,11 @@ __recovery_setup_file(WT_RECOVERY *r, const char *uri, const char *config)
 		r->nfiles = fileid + 1;
 	}
 
+	if (r->files[fileid].uri != NULL)
+		WT_PANIC_RET(r->session, WT_PANIC,
+		    "metadata corruption: files %s and %s have the same "
+		    "file ID %u",
+		    uri, r->files[fileid].uri, fileid);
 	WT_RET(__wt_strdup(r->session, uri, &r->files[fileid].uri));
 	WT_RET(
 	    __wt_config_getones(r->session, config, "checkpoint_lsn", &cval));
diff --git a/src/third_party/wiredtiger/src/txn/txn_timestamp.c b/src/third_party/wiredtiger/src/txn/txn_timestamp.c
index 7e26bfe8fe5..6046829def3 100644
--- a/src/third_party/wiredtiger/src/txn/txn_timestamp.c
+++ b/src/third_party/wiredtiger/src/txn/txn_timestamp.c
@@ -928,10 +928,22 @@ __wt_txn_set_read_timestamp(
 			did_roundup_to_oldest = true;
 		} else {
 			__wt_readunlock(session, &txn_global->rwlock);
-			WT_RET_MSG(session, EINVAL, "read timestamp "
+
+			/*
+			 * In some cases, MongoDB sets a read timestamp older
+			 * than the oldest timestamp, relying on WiredTiger's
+			 * concurrency to detect and fail the set. In other
+			 * cases it's a bug and MongoDB wants error context to
+			 * make it easier to find those problems. Don't output
+			 * an error message because that logs a MongoDB error,
+			 * use an informational message to provide the context
+			 * instead.
+			 */
+			WT_RET(__wt_msg(session, "read timestamp "
 			    "%s less than the oldest timestamp %s",
 			    __wt_timestamp_to_string(read_ts, ts_string[0]),
-			    __wt_timestamp_to_string(ts_oldest, ts_string[1]));
+			    __wt_timestamp_to_string(ts_oldest, ts_string[1])));
+			return (EINVAL);
 		}
 	} else
 		txn->read_timestamp = read_ts;
diff --git a/src/third_party/wiredtiger/src/utilities/util.h b/src/third_party/wiredtiger/src/utilities/util.h
index be58f8eae0e..3b12d9be98a 100644
--- a/src/third_party/wiredtiger/src/utilities/util.h
+++ b/src/third_party/wiredtiger/src/utilities/util.h
@@ -38,6 +38,7 @@ int	 util_dump(WT_SESSION *, int, char *[]);
 int	 util_err(WT_SESSION *, int, const char *, ...)
 	    WT_GCC_FUNC_DECL_ATTRIBUTE((format (printf, 3, 4)));
 int	 util_flush(WT_SESSION *, const char *);
+int	 util_import(WT_SESSION *, int, char *[]);
 int	 util_list(WT_SESSION *, int, char *[]);
 int	 util_load(WT_SESSION *, int, char *[]);
 int	 util_loadtext(WT_SESSION *, int, char *[]);
diff --git a/src/third_party/wiredtiger/src/utilities/util_import.c b/src/third_party/wiredtiger/src/utilities/util_import.c
new file mode 100644
index 00000000000..995a09cfb93
--- /dev/null
+++ b/src/third_party/wiredtiger/src/utilities/util_import.c
@@ -0,0 +1,49 @@
+/*-
+ * Copyright (c) 2014-2019 MongoDB, Inc.
+ * Copyright (c) 2008-2014 WiredTiger, Inc.
+ *	All rights reserved.
+ *
+ * See the file LICENSE for redistribution information.
+ */
+
+#include "util.h"
+
+static int
+usage(void)
+{
+	(void)fprintf(stderr,
+	    "usage: %s %s "
+	    "import uri\n",
+	    progname, usage_prefix);
+	return (1);
+}
+
+int
+util_import(WT_SESSION *session, int argc, char *argv[])
+{
+	WT_DECL_RET;
+	int ch;
+	char *uri;
+
+	uri = NULL;
+	while ((ch = __wt_getopt(progname, argc, argv, "")) != EOF)
+		switch (ch) {
+		case '?':
+		default:
+			return (usage());
+		}
+	argc -= __wt_optind;
+	argv += __wt_optind;
+
+	/* The remaining argument is the file URI. */
+	if (argc != 1)
+		return (usage());
+	if ((uri = util_uri(session, *argv, "file")) == NULL)
+		return (1);
+
+	if ((ret = session->import(session, uri, NULL)) != 0)
+		(void)util_err(session, ret, "WT_SESSION.import: %s", uri);
+
+	free(uri);
+	return (ret);
+}
diff --git a/src/third_party/wiredtiger/src/utilities/util_list.c b/src/third_party/wiredtiger/src/utilities/util_list.c
index e34fee663dc..ede0a91f979 100644
--- a/src/third_party/wiredtiger/src/utilities/util_list.c
+++ b/src/third_party/wiredtiger/src/utilities/util_list.c
@@ -71,27 +71,31 @@ list_get_allocsize(WT_SESSION *session, const char *key, size_t *allocsize)
 
 	*allocsize = 0;
 
+	parser = NULL;
+	config = NULL;
+
 	wt_api = session->connection->get_extension_api(session->connection);
 	if ((ret = wt_api->metadata_search(wt_api, session, key, &config)) != 0)
-		return (util_err(
+		WT_ERR(util_err(
 		    session, ret, "%s: WT_EXTENSION_API.metadata_search", key));
 	if ((ret = wt_api->config_parser_open(wt_api, session, config,
 	    strlen(config), &parser)) != 0)
-		return (util_err(
+		WT_ERR(util_err(
 		    session, ret, "WT_EXTENSION_API.config_parser_open"));
-	if ((ret = parser->get(parser, "allocation_size", &szvalue)) != 0) {
-		if (ret == WT_NOTFOUND)
-			ret = 0;
-		else
-			ret = util_err(session, ret, "WT_CONFIG_PARSER.get");
-		if ((tret = parser->close(parser)) != 0)
-			(void)util_err(session, tret, "WT_CONFIG_PARSER.close");
-		return (ret);
+	if ((ret = parser->get(parser, "allocation_size", &szvalue)) == 0)
+		*allocsize = (size_t)szvalue.val;
+	else
+		ret = ret == WT_NOTFOUND ?
+		    0 : util_err(session, ret, "WT_CONFIG_PARSER.get");
+err:
+	if (parser != NULL && (tret = parser->close(parser)) != 0) {
+		tret = util_err(session, tret, "WT_CONFIG_PARSER.close");
+		if (ret == 0)
+			ret = tret;
 	}
-	if ((ret = parser->close(parser)) != 0)
-		return (util_err(session, ret, "WT_CONFIG_PARSER.close"));
-	*allocsize = (size_t)szvalue.val;
-	return (0);
+
+	free(config);
+	return (ret);
 }
 
 /*
@@ -172,6 +176,27 @@ list_print(WT_SESSION *session, const char *uri, bool cflag, bool vflag)
 }
 
 /*
+ * list_print_size --
+ *	List a size found in the checkpoint information.
+ */
+static void
+list_print_size(uint64_t v)
+{
+	if (v >= WT_PETABYTE)
+		printf("%" PRIu64 " PB", v / WT_PETABYTE);
+	else if (v >= WT_TERABYTE)
+		printf("%" PRIu64 " TB", v / WT_TERABYTE);
+	else if (v >= WT_GIGABYTE)
+		printf("%" PRIu64 " GB", v / WT_GIGABYTE);
+	else if (v >= WT_MEGABYTE)
+		printf("%" PRIu64 " MB", v / WT_MEGABYTE);
+	else if (v >= WT_KILOBYTE)
+		printf("%" PRIu64 " KB", v / WT_KILOBYTE);
+	else
+		printf("%" PRIu64 " B", v);
+}
+
+/*
  * list_print_checkpoint --
  *	List the checkpoint information.
  */
@@ -183,7 +208,6 @@ list_print_checkpoint(WT_SESSION *session, const char *key)
 	WT_DECL_RET;
 	size_t allocsize, len;
 	time_t t;
-	uint64_t v;
 
 	/*
 	 * We may not find any checkpoints for this file, in which case we don't
@@ -210,38 +234,55 @@ list_print_checkpoint(WT_SESSION *session, const char *key)
 		 * Call ctime, not ctime_r; ctime_r has portability problems,
 		 * the Solaris version is different from the POSIX standard.
 		 */
+		if (ckpt != ckptbase)
+			printf("\n");
 		t = (time_t)ckpt->sec;
 		printf("\t%*s: %.24s", (int)len, ckpt->name, ctime(&t));
 
-		v = ckpt->size;
-		if (v >= WT_PETABYTE)
-			printf(" (%" PRIu64 " PB)\n", v / WT_PETABYTE);
-		else if (v >= WT_TERABYTE)
-			printf(" (%" PRIu64 " TB)\n", v / WT_TERABYTE);
-		else if (v >= WT_GIGABYTE)
-			printf(" (%" PRIu64 " GB)\n", v / WT_GIGABYTE);
-		else if (v >= WT_MEGABYTE)
-			printf(" (%" PRIu64 " MB)\n", v / WT_MEGABYTE);
-		else if (v >= WT_KILOBYTE)
-			printf(" (%" PRIu64 " KB)\n", v / WT_KILOBYTE);
-		else
-			printf(" (%" PRIu64 " B)\n", v);
+		printf(" (size ");
+		list_print_size(ckpt->size);
+		printf(")\n");
 
 		/* Decode the checkpoint block. */
 		if (ckpt->raw.data == NULL)
 			continue;
 		if ((ret = __wt_block_ckpt_decode(
 		    session, allocsize, ckpt->raw.data, &ci)) == 0) {
-			printf("\t\t" "root offset: %" PRIuMAX
-			    " (0x%" PRIxMAX ")\n",
-			    (uintmax_t)ci.root_offset,
-			    (uintmax_t)ci.root_offset);
-			printf("\t\t" "root size: %" PRIu32
-			    " (0x%" PRIx32 ")\n",
-			    ci.root_size, ci.root_size);
-			printf("\t\t" "root checksum: %" PRIu32
-			    " (0x%" PRIx32 ")\n",
+			printf("\t\t" "file-size: ");
+			list_print_size((uint64_t)ci.file_size);
+			printf(", checkpoint-size: ");
+			list_print_size(ci.ckpt_size);
+			printf("\n\n");
+
+			printf("\t\t" "          offset, size, checksum\n");
+			printf(
+			    "\t\t" "root    "
+			    ": %" PRIuMAX
+			    ", %" PRIu32
+			    ", %" PRIu32 " (%#" PRIx32 ")\n",
+			    (uintmax_t)ci.root_offset, ci.root_size,
 			    ci.root_checksum, ci.root_checksum);
+			printf(
+			    "\t\t" "alloc   "
+			    ": %" PRIuMAX
+			    ", %" PRIu32
+			    ", %" PRIu32 " (%#" PRIx32 ")\n",
+			    (uintmax_t)ci.alloc.offset, ci.alloc.size,
+			    ci.alloc.checksum, ci.alloc.checksum);
+			printf(
+			    "\t\t" "discard "
+			    ": %" PRIuMAX
+			    ", %" PRIu32
+			    ", %" PRIu32 " (%#" PRIx32 ")\n",
+			    (uintmax_t)ci.discard.offset, ci.discard.size,
+			    ci.discard.checksum, ci.discard.checksum);
+			printf(
+			    "\t\t" "avail   "
+			    ": %" PRIuMAX
+			    ", %" PRIu32
+			    ", %" PRIu32 " (%#" PRIx32 ")\n",
+			    (uintmax_t)ci.avail.offset, ci.avail.size,
+			    ci.avail.checksum, ci.avail.checksum);
 		} else {
 			/* Ignore the error and continue if damaged. */
 			(void)util_err(session, ret, "__wt_block_ckpt_decode");
diff --git a/src/third_party/wiredtiger/src/utilities/util_main.c b/src/third_party/wiredtiger/src/utilities/util_main.c
index 81ce18c3598..fb2b1990166 100644
--- a/src/third_party/wiredtiger/src/utilities/util_main.c
+++ b/src/third_party/wiredtiger/src/utilities/util_main.c
@@ -47,6 +47,10 @@ usage(void)
 	    "\t" "downgrade downgrade a database\n"
 	    "\t" "drop\t  drop an object\n"
 	    "\t" "dump\t  dump an object\n"
+	    /*
+	     * Import is not documented.
+	     * "\t" "import\t  import an object\n"
+	     */
 	    "\t" "list\t  list database objects\n"
 	    "\t" "load\t  load an object\n"
 	    "\t" "loadtext  load an object from a text file\n"
@@ -193,6 +197,10 @@ main(int argc, char *argv[])
 		else if (strcmp(command, "dump") == 0)
 			func = util_dump;
 		break;
+	case 'i':
+		if (strcmp(command, "import") == 0)
+			func = util_import;
+		break;
 	case 'l':
 		if (strcmp(command, "list") == 0)
 			func = util_list;
diff --git a/src/third_party/wiredtiger/test/checkpoint/smoke.sh b/src/third_party/wiredtiger/test/checkpoint/smoke.sh
index dba60babb92..e1bc3819c74 100755
--- a/src/third_party/wiredtiger/test/checkpoint/smoke.sh
+++ b/src/third_party/wiredtiger/test/checkpoint/smoke.sh
@@ -25,6 +25,9 @@ echo "checkpoint: 6 row-store tables, named checkpoint"
 $TEST_WRAPPER ./t -c 'TeSt' -T 6 -t r
 
 echo "checkpoint: row-store tables, stress LAS. Sweep and timestamps"
+$TEST_WRAPPER ./t -t r -W 3 -r 2 -D -s -x -n 100000 -k 100000 -C cache_size=100MB
+
+echo "checkpoint: row-store tables, Sweep and timestamps"
 $TEST_WRAPPER ./t -t r -W 3 -r 2 -s -x -n 100000 -k 100000 -C cache_size=100MB
 
 echo "checkpoint: 3 mixed tables, with sweep"
diff --git a/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.c b/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.c
index 461b6334b27..c30af666c5c 100644
--- a/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.c
+++ b/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.c
@@ -57,6 +57,7 @@ main(int argc, char *argv[])
 	working_dir = NULL;
 	ttype = MIX;
 	g.checkpoint_name = "WiredTigerCheckpoint";
+	g.debug_mode = false;
 	g.home = dmalloc(512);
 	g.nkeys = 10000;
 	g.nops = 100000;
@@ -66,7 +67,7 @@ main(int argc, char *argv[])
 	runs = 1;
 
 	while ((ch = __wt_getopt(
-	    progname, argc, argv, "C:c:h:k:l:n:r:sT:t:W:x")) != EOF)
+	    progname, argc, argv, "C:c:Dh:k:l:n:r:sT:t:W:x")) != EOF)
 		switch (ch) {
 		case 'c':
 			g.checkpoint_name = __wt_optarg;
@@ -74,6 +75,9 @@ main(int argc, char *argv[])
 		case 'C':			/* wiredtiger_open config */
 			config_open = __wt_optarg;
 			break;
+		case 'D':
+			g.debug_mode = true;
+			break;
 		case 'h':			/* wiredtiger_open config */
 			working_dir = __wt_optarg;
 			break;
@@ -182,6 +186,8 @@ main(int argc, char *argv[])
 	return (g.status);
 }
 
+#define	DEBUG_MODE_CFG						\
+",debug_mode=(eviction=true,table_logging=true)"
 /*
  * wt_connect --
  *	Configure the WiredTiger connection.
@@ -208,16 +214,18 @@ wt_connect(const char *config_open)
 		    "statistics_log=(json,wait=1),error_prefix=\"%s\","	\
 		    "file_manager=(close_handle_minimum=1,close_idle_time=1,"\
 		    "close_scan_interval=1),log=(enabled),cache_size=1GB,"\
-		    "timing_stress_for_test=(aggressive_sweep)%s%s",
+		    "timing_stress_for_test=(aggressive_sweep)%s%s%s",
 		    progname,
+		    g.debug_mode ? DEBUG_MODE_CFG : "",
 		    config_open == NULL ? "" : ",",
 		    config_open == NULL ? "" : config_open));
 	else
 		testutil_check(__wt_snprintf(config, sizeof(config),
 		    "create,cache_cursors=false,statistics=(fast),"	\
 		    "statistics_log=(json,wait=1),error_prefix=\"%s\""	\
-		    "%s%s",
+		    "%s%s%s",
 		    progname,
+		    g.debug_mode ? DEBUG_MODE_CFG : "",
 		    config_open == NULL ? "" : ",",
 		    config_open == NULL ? "" : config_open));
 
diff --git a/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.h b/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.h
index b579f5cf9b9..3d4375cd137 100644
--- a/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.h
+++ b/src/third_party/wiredtiger/test/checkpoint/test_checkpoint.h
@@ -55,6 +55,7 @@ typedef struct {
 	char *home;				/* Home directory */
 	const char *checkpoint_name;		/* Checkpoint name */
 	WT_CONNECTION *conn;			/* WiredTiger connection */
+	bool debug_mode;			/* Lookaside stress test */
 	u_int nkeys;				/* Keys to load */
 	u_int nops;				/* Operations per thread */
 	FILE *logfp;				/* Message log file. */
diff --git a/src/third_party/wiredtiger/test/csuite/Makefile.am b/src/third_party/wiredtiger/test/csuite/Makefile.am
index 8b29565b596..f737bc97bed 100644
--- a/src/third_party/wiredtiger/test/csuite/Makefile.am
+++ b/src/third_party/wiredtiger/test/csuite/Makefile.am
@@ -7,6 +7,9 @@ AM_LDFLAGS = -static
 all_TESTS=
 noinst_PROGRAMS=
 
+# The import test is only a shell script
+all_TESTS += import/smoke.sh
+
 test_random_abort_SOURCES = random_abort/main.c
 noinst_PROGRAMS += test_random_abort
 all_TESTS += random_abort/smoke.sh
@@ -137,7 +140,7 @@ all_TESTS += test_wt4803_cache_overflow_abort
 
 # Run this during a "make check" smoke test.
 TESTS = $(all_TESTS)
-LOG_COMPILER = $(TEST_WRAPPER)
+LOG_COMPILER = env top_builddir=$(top_builddir) top_srcdir=$(top_srcdir) $(TEST_WRAPPER)
 
 clean-local:
 	rm -rf WT_TEST.* core.* *.core
diff --git a/src/third_party/wiredtiger/test/csuite/import/smoke.sh b/src/third_party/wiredtiger/test/csuite/import/smoke.sh
new file mode 100755
index 00000000000..624e3b26336
--- /dev/null
+++ b/src/third_party/wiredtiger/test/csuite/import/smoke.sh
@@ -0,0 +1,115 @@
+#! /bin/sh
+
+set -e
+
+# Bypass this test for slow machines, valgrind
+test "$TESTUTIL_SLOW_MACHINE" = "1" && exit 0
+test "$TESTUTIL_BYPASS_VALGRIND" = "1" && exit 0
+
+# If $top_builddir/$top_srcdir aren't set, default to building in build_posix
+# and running in test/csuite.
+top_builddir=${top_builddir:-../../build_posix}
+top_srcdir=${top_srcdir:-../..}
+
+dir=WT_TEST.import
+
+rundir=$dir/RUNDIR
+foreign=$dir/FOREIGN
+
+mo=$dir/metadata.orig
+mi=$dir/metadata.import
+co=$dir/ckpt.orig
+ci=$dir/ckpt.import
+
+EXT="extensions=[\
+$top_builddir/ext/encryptors/rotn/.libs/libwiredtiger_rotn.so,\
+$top_builddir/ext/collators/reverse/.libs/libwiredtiger_reverse_collator.so]"
+
+wt="$top_builddir/wt"
+
+# Run test/format to create an object.
+format()
+{
+	rm -rf $rundir
+
+	$top_builddir/test/format/t \
+	    -1q \
+	    -C "$EXT" \
+	    -c $top_srcdir/test/format/CONFIG.stress \
+	    -h $rundir \
+	    backups=0 \
+	    checkpoints=1 \
+	    data_source=file \
+	    ops=0 \
+	    rebalance=0 \
+	    salvage=0 \
+	    threads=4 \
+	    timer=2 \
+	    verify=1
+}
+
+import()
+{
+	# Update the extensions if the run included encryption.
+	egrep 'encryption=none' $rundir/CONFIG > /dev/null ||
+	    EXT="encryption=(name=rotn,keyid=7),$EXT"
+
+	# Dump the original metadata.
+	echo; echo 'dumping the original metadata'
+	$wt -C "$EXT" -h $rundir list -cv file:wt
+	$wt -C "$EXT" -h $rundir list -v file:wt | sed 1d > $mo
+
+	# Create a stub datbase and copy in the table.
+	rm -rf $foreign && mkdir $foreign
+	$wt -C "$EXT" -h $foreign create file:xxx
+	cp $rundir/wt $foreign/yyy
+
+	# Import the table.
+	$wt -C "$EXT" -h $foreign import file:yyy
+
+	# Dump the imported metadata.
+	echo; echo 'dumping the imported metadata'
+	$wt -C "$EXT" -h $foreign list -cv file:yyy
+	$wt -C "$EXT" -h $foreign list -v file:yyy | sed 1d > $mi
+}
+
+compare_checkpoints()
+{
+	sed -e 's/.*\(checkpoint=.*))\).*/\1/' < $mo > $co
+	sed -e 's/.*\(checkpoint=.*))\).*/\1/' < $mi > $ci
+	echo; echo 'original checkpoint'
+	cat $co
+	echo; echo 'imported checkpoint'
+	cat $ci
+
+	echo; echo 'comparing the original and imported checkpoints'
+	cmp $co $ci && echo 'comparison succeeded'
+}
+
+verify()
+{
+	echo; echo 'verifying the imported file'
+	$wt -C "$EXT" -h $foreign verify file:yyy && echo 'verify succeeded'
+}
+
+# If verify fails, you can repeatedly run the import, checkpoint comparison and
+# verify process using the -r option for debugging.
+readonly=0
+while :
+	do case "$1" in
+	-r)
+		readonly=1
+		shift;;
+	*)
+		break;;
+	esac
+done
+
+if test $readonly -eq 0; then
+	rm -rf $dir && mkdir $dir
+	format
+fi
+import
+compare_checkpoints
+verify
+exit 0
diff --git a/src/third_party/wiredtiger/test/csuite/random_abort/smoke.sh b/src/third_party/wiredtiger/test/csuite/random_abort/smoke.sh
index e36ad62dd8b..713b000b4f1 100755
--- a/src/third_party/wiredtiger/test/csuite/random_abort/smoke.sh
+++ b/src/third_party/wiredtiger/test/csuite/random_abort/smoke.sh
@@ -4,7 +4,12 @@ set -e
 
 # Smoke-test random-abort as part of running "make check".
 
-$TEST_WRAPPER ./test_random_abort -t 10 -T 5
-$TEST_WRAPPER ./test_random_abort -m -t 10 -T 5
-$TEST_WRAPPER ./test_random_abort -C -t 10 -T 5
-$TEST_WRAPPER ./test_random_abort -C -m -t 10 -T 5
+# If $top_builddir/$top_srcdir aren't set, default to building in build_posix
+# and running in test/csuite.
+top_builddir=${top_builddir:-../../build_posix}
+top_srcdir=${top_srcdir:-../..}
+
+$TEST_WRAPPER $top_builddir/test/csuite/test_random_abort -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_random_abort -m -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_random_abort -C -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_random_abort -C -m -t 10 -T 5
diff --git a/src/third_party/wiredtiger/test/csuite/random_directio/smoke.sh b/src/third_party/wiredtiger/test/csuite/random_directio/smoke.sh
index f871ff4684d..815b8a21c9f 100755
--- a/src/third_party/wiredtiger/test/csuite/random_directio/smoke.sh
+++ b/src/third_party/wiredtiger/test/csuite/random_directio/smoke.sh
@@ -4,7 +4,12 @@ set -e
 
 # Smoke-test random_directio as part of running "make check".
 
-RUN_TEST_CMD="$TEST_WRAPPER ./test_random_directio"
+# If $top_builddir/$top_srcdir aren't set, default to building in build_posix
+# and running in test/csuite.
+top_builddir=${top_builddir:-../../build_posix}
+top_srcdir=${top_srcdir:-../..}
+
+RUN_TEST_CMD="$TEST_WRAPPER $top_builddir/test/csuite/test_random_directio"
 
 # Replace for more complete testing
 #TEST_THREADS="1 5 10"
diff --git a/src/third_party/wiredtiger/test/csuite/schema_abort/smoke.sh b/src/third_party/wiredtiger/test/csuite/schema_abort/smoke.sh
index 41d702d40cd..2e52b6f438c 100755
--- a/src/third_party/wiredtiger/test/csuite/schema_abort/smoke.sh
+++ b/src/third_party/wiredtiger/test/csuite/schema_abort/smoke.sh
@@ -4,9 +4,14 @@ set -e
 
 # Smoke-test schema-abort as part of running "make check".
 
-$TEST_WRAPPER ./test_schema_abort -t 10 -T 5
-$TEST_WRAPPER ./test_schema_abort -m -t 10 -T 5
-$TEST_WRAPPER ./test_schema_abort -C -t 10 -T 5
-$TEST_WRAPPER ./test_schema_abort -C -m -t 10 -T 5
-$TEST_WRAPPER ./test_schema_abort -m -t 10 -T 5 -z
-$TEST_WRAPPER ./test_schema_abort -m -t 10 -T 5 -x
+# If $top_builddir/$top_srcdir aren't set, default to building in build_posix
+# and running in test/csuite.
+top_builddir=${top_builddir:-../../build_posix}
+top_srcdir=${top_srcdir:-../..}
+
+$TEST_WRAPPER $top_builddir/test/csuite/test_schema_abort -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_schema_abort -m -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_schema_abort -C -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_schema_abort -C -m -t 10 -T 5
+$TEST_WRAPPER $top_builddir/test/csuite/test_schema_abort -m -t 10 -T 5 -z
+$TEST_WRAPPER $top_builddir/test/csuite/test_schema_abort -m -t 10 -T 5 -x
diff --git a/src/third_party/wiredtiger/test/csuite/timestamp_abort/smoke.sh b/src/third_party/wiredtiger/test/csuite/timestamp_abort/smoke.sh
index 661261eb1bb..324e981dd70 100755
--- a/src/third_party/wiredtiger/test/csuite/timestamp_abort/smoke.sh
+++ b/src/third_party/wiredtiger/test/csuite/timestamp_abort/smoke.sh
@@ -4,9 +4,14 @@ set -e
 
 # Smoke-test timestamp-abort as part of running "make check".
 
-$TEST_WRAPPER ./test_timestamp_abort -t 10 -T 5
-#$TEST_WRAPPER ./test_timestamp_abort -t 10 -T 5 -L
-$TEST_WRAPPER ./test_timestamp_abort -m -t 10 -T 5
-#$TEST_WRAPPER ./test_timestamp_abort -m -t 10 -T 5 -L
-$TEST_WRAPPER ./test_timestamp_abort -C -t 10 -T 5
-$TEST_WRAPPER ./test_timestamp_abort -C -m -t 10 -T 5
+# If $top_builddir/$top_srcdir aren't set, default to building in build_posix
+# and running in test/csuite.
+top_builddir=${top_builddir:-../../build_posix}
+top_srcdir=${top_srcdir:-../..}
+
+ $TEST_WRAPPER $top_builddir/test/csuite/test_timestamp_abort -t 10 -T 5
+#$TEST_WRAPPER $top_builddir/test/csuite/test_timestamp_abort -t 10 -T 5 -L
+ $TEST_WRAPPER $top_builddir/test/csuite/test_timestamp_abort -m -t 10 -T 5
+#$TEST_WRAPPER $top_builddir/test/csuite/test_timestamp_abort -m -t 10 -T 5 -L
+ $TEST_WRAPPER $top_builddir/test/csuite/test_timestamp_abort -C -t 10 -T 5
+ $TEST_WRAPPER $top_builddir/test/csuite/test_timestamp_abort -C -m -t 10 -T 5
diff --git a/src/third_party/wiredtiger/test/csuite/wt2909_checkpoint_integrity/main.c b/src/third_party/wiredtiger/test/csuite/wt2909_checkpoint_integrity/main.c
index bec69105679..54b56d597a4 100644
--- a/src/third_party/wiredtiger/test/csuite/wt2909_checkpoint_integrity/main.c
+++ b/src/third_party/wiredtiger/test/csuite/wt2909_checkpoint_integrity/main.c
@@ -102,8 +102,6 @@ static void subtest_populate(TEST_OPTS *, bool);
 
 extern int   __wt_optind;
 
-#define	WT_FAIL_FS_LIB	"../../ext/test/fail_fs/.libs/libwiredtiger_fail_fs.so"
-
 /*
  * check_results --
  *	Check all the tables and verify the results.
@@ -318,7 +316,7 @@ run_check_subtest(TEST_OPTS *opts, const char *debugger, uint64_t nops,
 		subtest_args[narg++] = (char *)"--";
 	}
 
-	subtest_args[narg++] = (char *)opts->progname;
+	subtest_args[narg++] = (char *)opts->argv0;
 	/* "subtest" must appear before arguments */
 	if (close_test)
 		subtest_args[narg++] = (char *)"subtest_close";
@@ -342,7 +340,7 @@ run_check_subtest(TEST_OPTS *opts, const char *debugger, uint64_t nops,
 		    " operations until fail...\n", nops);
 	testutil_clean_work_dir(opts->home);
 	testutil_check(run_process(
-	    opts, debugger != NULL ? debugger : opts->progname,
+	    opts, debugger != NULL ? debugger : opts->argv0,
 	    subtest_args, &estatus));
 	if (opts->verbose)
 		printf("process exited %d\n", estatus);
@@ -524,6 +522,7 @@ subtest_main(int argc, char *argv[], bool close_test)
 	TEST_OPTS *opts, _opts;
 	WT_SESSION *session;
 	char config[1024], filename[1024];
+	const char *p;
 
 	opts = &_opts;
 	memset(opts, 0, sizeof(*opts));
@@ -541,17 +540,25 @@ subtest_main(int argc, char *argv[], bool close_test)
 	testutil_check(__wt_snprintf(
 	    filename, sizeof(filename), "%s/%s", opts->home, STDOUT_FILE));
 	testutil_assert(freopen(filename, "a", stdout) != NULL);
+
+	/*
+	 * Use $top_builddir if it's available, otherwise assume we're building
+	 * in build_posix and running in the test/csuite directory.
+	 */
+#define	WT_FAIL_FS_LIB	"ext/test/fail_fs/.libs/libwiredtiger_fail_fs.so"
+	if ((p = getenv("top_builddir")) == NULL)
+		p = "../../build_posix";
 	testutil_check(__wt_snprintf(config, sizeof(config),
 	    "create,cache_size=250M,log=(enabled),"
-	    "transaction_sync=(enabled,method=none),extensions=("
-	    WT_FAIL_FS_LIB
-	    "=(early_load,config={environment=true,verbose=true})]"));
-
+	    "transaction_sync=(enabled,method=none),"
+	    "extensions=(%s/%s="
+	    "(early_load,config={environment=true,verbose=true}))",
+	    p, WT_FAIL_FS_LIB));
 	testutil_check(
 	    wiredtiger_open(opts->home, &event_handler, config, &opts->conn));
+
 	testutil_check(
 	    opts->conn->open_session(opts->conn, NULL, NULL, &session));
-
 	testutil_check(session->create(session, "table:subtest",
 	    "key_format=i,value_format=iiiS,"
 	    "columns=(id,v0,v1,v2,big)"));
diff --git a/src/third_party/wiredtiger/test/csuite/wt3120_filesys/main.c b/src/third_party/wiredtiger/test/csuite/wt3120_filesys/main.c
index aa8d8a4e521..148d0062ddd 100644
--- a/src/third_party/wiredtiger/test/csuite/wt3120_filesys/main.c
+++ b/src/third_party/wiredtiger/test/csuite/wt3120_filesys/main.c
@@ -36,24 +36,29 @@
  * than that.
  */
 
-#define	WT_FAIL_FS_LIB	"../../ext/test/fail_fs/.libs/libwiredtiger_fail_fs.so"
-
 int
 main(int argc, char *argv[])
 {
 	TEST_OPTS *opts, _opts;
 	WT_CURSOR *cursor;
 	WT_SESSION *session;
-	char buf[1024];
-	char *kstr, *vstr;
+	char *kstr, *vstr, buf[1024];
+	const char *p;
 
 	opts = &_opts;
 	memset(opts, 0, sizeof(*opts));
 	testutil_check(testutil_parse_opts(argc, argv, opts));
 	testutil_make_work_dir(opts->home);
 
+	/*
+	 * Use $top_builddir if it's available, otherwise assume we're building
+	 * in build_posix and running in the test/csuite directory.
+	 */
+#define	WT_FAIL_FS_LIB	"ext/test/fail_fs/.libs/libwiredtiger_fail_fs.so"
+	if ((p = getenv("top_builddir")) == NULL)
+		p = "../../build_posix";
 	testutil_check(__wt_snprintf(buf, sizeof(buf),
-	    "create,extensions=(" WT_FAIL_FS_LIB "=(early_load=true))"));
+	    "create,extensions=(%s/%s=(early_load=true))", p, WT_FAIL_FS_LIB));
 	testutil_check(wiredtiger_open(opts->home, NULL, buf, &opts->conn));
 	testutil_check(
 	    opts->conn->open_session(opts->conn, NULL, NULL, &session));
diff --git a/src/third_party/wiredtiger/test/evergreen.yml b/src/third_party/wiredtiger/test/evergreen.yml
index 99933cff595..e9ae4d1e37b 100644
--- a/src/third_party/wiredtiger/test/evergreen.yml
+++ b/src/third_party/wiredtiger/test/evergreen.yml
@@ -364,6 +364,21 @@ tasks:
 
   # Start of csuite test tasks
 
+  - name: csuite-import-test
+    depends_on:
+      - name: compile
+    commands:
+      - func: "fetch artifacts"
+      - func: "compile wiredtiger"
+      - command: shell.exec
+        params:
+          working_dir: "wiredtiger/build_posix"
+          script: |
+            set -o errexit
+            set -o verbose
+
+            ${test_env_vars|} $(pwd)/../test/csuite/import/smoke.sh 2>&1
+
   - name: csuite-random-abort-test
     depends_on:
       - name: compile
@@ -371,12 +386,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/../../../test/csuite/random_abort/smoke.sh 2>&1
+            ${test_env_vars|} $(pwd)/../test/csuite/random_abort/smoke.sh 2>&1
 
   - name: csuite-random-directio-test
     depends_on:
@@ -385,12 +400,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/../../../test/csuite/random_directio/smoke.sh 2>&1
+            ${test_env_vars|} $(pwd)/../test/csuite/random_directio/smoke.sh 2>&1
 
   - name: csuite-schema-abort-test
     depends_on:
@@ -399,12 +414,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/../../../test/csuite/schema_abort/smoke.sh 2>&1
+            ${test_env_vars|} $(pwd)/../test/csuite/schema_abort/smoke.sh 2>&1
 
   - name: csuite-timestamp-abort-test
     depends_on:
@@ -413,12 +428,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/../../../test/csuite/timestamp_abort/smoke.sh 2>&1
+            ${test_env_vars|} $(pwd)/../test/csuite/timestamp_abort/smoke.sh 2>&1
 
   - name: csuite-scope-test
     depends_on:
@@ -427,12 +442,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_scope 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_scope 2>&1
 
   - name: csuite-truncated-log-test
     depends_on:
@@ -441,12 +456,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_truncated_log 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_truncated_log 2>&1
 
   - name: csuite-wt1965-col-efficiency-test
     depends_on:
@@ -455,12 +470,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt1965_col_efficiency 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt1965_col_efficiency 2>&1
 
   - name: csuite-wt2403-lsm-workload-test
     depends_on:
@@ -469,12 +484,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2403_lsm_workload 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2403_lsm_workload 2>&1
 
   - name: csuite-wt2447-join-main-table-test
     depends_on:
@@ -483,12 +498,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2447_join_main_table 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2447_join_main_table 2>&1
 
   - name: csuite-wt2695-checksum-test
     depends_on:
@@ -497,12 +512,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2695_checksum 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2695_checksum 2>&1
 
   - name: csuite-wt2592-join-schema-test
     depends_on:
@@ -511,12 +526,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2592_join_schema 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2592_join_schema 2>&1
 
   - name: csuite-wt2719-reconfig-test
     depends_on:
@@ -525,12 +540,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2719_reconfig 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2719_reconfig 2>&1
 
   - name: csuite-wt2999-join-extractor-test
     depends_on:
@@ -539,12 +554,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2999_join_extractor 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2999_join_extractor 2>&1
 
   - name: csuite-wt3120-filesys-test
     depends_on:
@@ -553,12 +568,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt3120_filesys 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt3120_filesys 2>&1
 
   - name: csuite-wt3135-search-near-collator-test
     depends_on:
@@ -567,12 +582,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt3135_search_near_collator 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt3135_search_near_collator 2>&1
 
   - name: csuite-wt3184-dup-index-collator-test
     depends_on:
@@ -581,12 +596,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt3184_dup_index_collator 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt3184_dup_index_collator 2>&1
 
   - name: csuite-wt3363-checkpoint-op-races-test
     depends_on:
@@ -595,12 +610,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt3363_checkpoint_op_races 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt3363_checkpoint_op_races 2>&1
 
   - name: csuite-wt3874-pad-byte-collator-test
     depends_on:
@@ -609,12 +624,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt3874_pad_byte_collator 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt3874_pad_byte_collator 2>&1
 
   - name: csuite-wt4105-large-doc-small-upd-test
     depends_on:
@@ -623,12 +638,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt4105_large_doc_small_upd 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt4105_large_doc_small_upd 2>&1
 
   - name: csuite-wt4117-checksum-test
     depends_on:
@@ -637,12 +652,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt4117_checksum 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt4117_checksum 2>&1
 
   - name: csuite-wt4156-metadata-salvage-test
     depends_on:
@@ -651,12 +666,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt4156_metadata_salvage 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt4156_metadata_salvage 2>&1
 
   - name: csuite-wt4699-json-test
     depends_on:
@@ -665,12 +680,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt4699_json 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt4699_json 2>&1
 
   - name: csuite-wt4803-cache-overflow-abort-test
     depends_on:
@@ -679,12 +694,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt4803_cache_overflow_abort 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt4803_cache_overflow_abort 2>&1
 
   - name: csuite-rwlock-test
     depends_on:
@@ -693,12 +708,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_rwlock 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_rwlock 2>&1
 
   - name: csuite-wt2246-col-append-test
     depends_on:
@@ -707,12 +722,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2246_col_append 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2246_col_append 2>&1
 
   - name: csuite-wt2323-join-visibility-test
     depends_on:
@@ -721,12 +736,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2323_join_visibility 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2323_join_visibility 2>&1
 
   - name: csuite-wt2535-insert-race-test
     depends_on:
@@ -735,12 +750,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2535_insert_race 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2535_insert_race 2>&1
 
   - name: csuite-wt2834-join-bloom-fix-test
     depends_on:
@@ -749,12 +764,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2834_join_bloom_fix 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2834_join_bloom_fix 2>&1
 
   - name: csuite-wt2853-perf-test
     depends_on:
@@ -763,12 +778,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2853_perf 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2853_perf 2>&1
 
   - name: csuite-wt2909-checkpoint-integrity-test
     depends_on:
@@ -777,12 +792,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt2909_checkpoint_integrity 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt2909_checkpoint_integrity 2>&1
 
   - name: csuite-wt3338-partial-update-test
     depends_on:
@@ -791,12 +806,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt3338_partial_update 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt3338_partial_update 2>&1
 
   - name: csuite-wt4333-handle-locks-test
     depends_on:
@@ -805,12 +820,12 @@ tasks:
       - func: "fetch artifacts"
       - command: shell.exec
         params:
-          working_dir: "wiredtiger/build_posix/test/csuite"
+          working_dir: "wiredtiger/build_posix"
           script: |
             set -o errexit
             set -o verbose
 
-            ${test_env_vars|} $(pwd)/test_wt4333_handle_locks 2>&1
+            ${test_env_vars|} $(pwd)/test/csuite/test_wt4333_handle_locks 2>&1
 
   # End of csuite test tasks
 
@@ -1158,7 +1173,7 @@ buildvariants:
   - ubuntu1404-test
   expansions:
     # It's ugly, but we need the absolute path here, not the relative
-    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs
+    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs top_srcdir=$(pwd)/.. top_builddir=$(pwd)
     smp_command: -j $(grep -c ^processor /proc/cpuinfo)
     configure_env_vars: CC=/opt/mongodbtoolchain/v3/bin/gcc CXX=/opt/mongodbtoolchain/v3/bin/g++ PATH=/opt/mongodbtoolchain/v3/bin:$PATH
     make_command: PATH=/opt/mongodbtoolchain/v3/bin:$PATH make
@@ -1178,6 +1193,7 @@ buildvariants:
     - name: salvage-test
     - name: thread-test
     - name: bench-wtperf-test
+    - name: csuite-import-test
     - name: csuite-random-abort-test
     - name: csuite-random-directio-test
     - name: csuite-schema-abort-test
@@ -1224,7 +1240,7 @@ buildvariants:
   run_on:
   - ubuntu1404-test
   expansions:
-    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs
+    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs top_srcdir=$(pwd)/.. top_builddir=$(pwd)
     smp_command: -j $(grep -c ^processor /proc/cpuinfo)
     configure_env_vars: CC=/opt/mongodbtoolchain/v3/bin/gcc CXX=/opt/mongodbtoolchain/v3/bin/g++ PATH=/opt/mongodbtoolchain/v3/bin:$PATH
     configure_python_setting: PYTHON=python3
@@ -1285,7 +1301,7 @@ buildvariants:
     smp_command: -j $(sysctl -n hw.logicalcpu)
     configure_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH
     make_command: PATH=/opt/mongodbtoolchain/v3/bin:$PATH ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future make
-    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH DYLD_LIBRARY_PATH=$(pwd)/.libs
+    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH DYLD_LIBRARY_PATH=$(pwd)/.libs top_srcdir=$(pwd)/.. top_builddir=$(pwd)
   tasks:
     - name: compile
     - name: make-check-test
@@ -1300,7 +1316,7 @@ buildvariants:
   expansions:
     smp_command: -j $(grep -c ^processor /proc/cpuinfo)
     configure_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH
-    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs
+    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs top_srcdir=$(pwd)/.. top_builddir=$(pwd)
   tasks:
   - name: compile
   - name: generate-datafile-little-endian
@@ -1317,7 +1333,7 @@ buildvariants:
   expansions:
     smp_command: -j $(grep -c ^processor /proc/cpuinfo)
     configure_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH
-    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.libs
+    test_env_vars: PATH=/opt/mongodbtoolchain/v3/bin:$PATH LD_LIBRARY_PATH=$(pwd)/.lib top_srcdir=$(pwd)/.. top_builddir=$(pwd)
   tasks:
   - name: compile
   - name: generate-datafile-big-endian
diff --git a/src/third_party/wiredtiger/test/format/config.c b/src/third_party/wiredtiger/test/format/config.c
index 8f2c25429c9..df3222b072a 100644
--- a/src/third_party/wiredtiger/test/format/config.c
+++ b/src/third_party/wiredtiger/test/format/config.c
@@ -106,7 +106,7 @@ config_setup(void)
 			 * cache problems, don't configure LSM if those set.
 			 *
 			 * XXX
-			 * Remove the timestamp test when WT-4067 resolved.
+			 * Remove the timestamp test when WT-4162 resolved.
 			 */
 			if (g.type != ROW || g.c_in_memory)
 				break;
@@ -563,8 +563,7 @@ config_lsm_reset(void)
 	 * LSM doesn't currently play nicely with timestamps, don't choose the
 	 * pair unless forced to. If we turn off timestamps, make sure we turn
 	 * off prepare as well, it requires timestamps. Remove this code with
-	 * WT-4067.
-	 *
+	 * WT-4162.
 	 */
 	if (!config_is_perm("prepare") &&
 	    !config_is_perm("transaction_timestamps")) {
diff --git a/src/third_party/wiredtiger/test/suite/run.py b/src/third_party/wiredtiger/test/suite/run.py
index 5895325a3d7..3de273c8ebf 100755
--- a/src/third_party/wiredtiger/test/suite/run.py
+++ b/src/third_party/wiredtiger/test/suite/run.py
@@ -31,7 +31,7 @@
 #
 
 from __future__ import print_function
-import glob, json, os, re, sys
+import glob, json, os, random, re, sys
 
 try:
     xrange
@@ -118,6 +118,8 @@ Options:\n\
   -j N    | --parallel N         run all tests in parallel using N processes\n\
   -l      | --long               run the entire test suite\n\
   -p      | --preserve           preserve output files in WT_TEST/<testname>\n\
+  -r N    | --random-sample N    randomly sort scenarios to be run, then\n\
+                                 execute every Nth (2<=N<=1000) scenario.\n\
   -s N    | --scenario N         use scenario N (N can be number or symbolic)\n\
   -t      | --timestamp          name WT_TEST according to timestamp\n\
   -v N    | --verbose N          set verboseness to N (0<=N<=3, default=1)\n\
@@ -269,6 +271,7 @@ if __name__ == '__main__':
     # Turn numbers and ranges into test module names
     preserve = timestamp = debug = dryRun = gdbSub = lldbSub = longtest = False
     parallel = 0
+    random_sample = 0
     configfile = None
     configwrite = False
     dirarg = None
@@ -307,6 +310,15 @@ if __name__ == '__main__':
             if option == '-long' or option == 'l':
                 longtest = True
                 continue
+            if option == '-random-sample' or option == 'r':
+                if len(args) == 0:
+                    usage()
+                    sys.exit(2)
+                random_sample = int(args.pop(0))
+                if random_sample < 2 or random_sample > 1000:
+                    usage()
+                    sys.exit(2)
+                continue
             if option == '-parallel' or option == 'j':
                 if parallel != 0 or len(args) == 0:
                     usage()
@@ -376,6 +388,14 @@ if __name__ == '__main__':
         for arg in testargs:
             testsFromArg(tests, loader, arg, scenario)
 
+    # Shuffle the tests and create a new suite containing every Nth test from
+    # the original suite
+    if random_sample > 0:
+        random_sample_tests = []
+        for test in tests:
+            random_sample_tests.append(test)
+        random.shuffle(random_sample_tests)
+        tests = unittest.TestSuite(random_sample_tests[::random_sample])
     if debug:
         import pdb
         pdb.set_trace()
diff --git a/src/third_party/wiredtiger/test/suite/test_debug_mode04.py b/src/third_party/wiredtiger/test/suite/test_debug_mode04.py
new file mode 100644
index 00000000000..1f5429495e8
--- /dev/null
+++ b/src/third_party/wiredtiger/test/suite/test_debug_mode04.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+#
+# Public Domain 2034-2039 MongoDB, Inc.
+# Public Domain 2008-2034 WiredTiger, Inc.
+#
+# This is free and unencumbered software released into the public domain.
+#
+# Anyone is free to copy, modify, publish, use, compile, sell, or
+# distribute this software, either in source code form or as a compiled
+# binary, for any purpose, commercial or non-commercial, and by any
+# means.
+#
+# In jurisdictions that recognize copyright laws, the author or authors
+# of this software dedicate any and all copyright interest in the
+# software to the public domain. We make this dedication for the benefit
+# of the public at large and to the detriment of our heirs and
+# successors. We intend this dedication to be an overt act of
+# relinquishment in perpetuity of all present and future rights to this
+# software under copyright law.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+
+import wiredtiger, wttest
+
+# test_debug_mode04.py
+#    Test the debug mode settings. Test eviction use.
+class test_debug_mode04(wttest.WiredTigerTestCase):
+    conn_config = 'log=(enabled=true,file_max=100K),debug_mode=(eviction=true)'
+    uri = 'file:test_debug'
+    entries = 100
+    value = b'\x01\x02abcd\x03\x04'
+
+    def add_data(self):
+        keys = range(0, self.entries)
+        c = self.session.open_cursor(self.uri, None)
+        for k in keys:
+            c[k] = self.value
+        c.close()
+
+    # Just test turning it on and off. There really isn't something
+    # specific to verify.
+    def test_table_logging(self):
+        self.session.create(self.uri, 'key_format=i,value_format=u')
+        self.add_data()
+
+    def test_table_logging_off(self):
+        self.conn.reconfigure("debug_mode=(eviction=false)")
+        self.session.create(self.uri, 'key_format=i,value_format=u')
+        self.add_data()
+
+if __name__ == '__main__':
+    wttest.run()
diff --git a/src/third_party/wiredtiger/test/suite/test_empty.py b/src/third_party/wiredtiger/test/suite/test_empty.py
index f7949871a11..b41ae3540c9 100755
--- a/src/third_party/wiredtiger/test/suite/test_empty.py
+++ b/src/third_party/wiredtiger/test/suite/test_empty.py
@@ -28,7 +28,6 @@
 
 import os
 import wiredtiger, wttest
-from wtdataset import simple_key
 from wtscenario import make_scenarios
 
 # test_empty.py
@@ -53,47 +52,5 @@ class test_empty(wttest.WiredTigerTestCase):
             name = name + '.wt'
         self.assertEquals(os.stat(name).st_size, 4*1024)
 
-    # Open a new session, add a few rows to an object and then remove them,
-    # then close the object.  We open/close the object so it's flushed from
-    # the underlying cache each time.
-    def empty(self):
-        uri = self.type + self.name
-        self.session = self.conn.open_session()
-        self.session.create(uri, 'key_format=' + self.fmt + ',value_format=S')
-
-        # Add a few records to the object and remove them.
-        cursor = self.session.open_cursor(uri, None, None)
-        for i in range(1,5):
-            key = simple_key(cursor, i)
-            cursor[key] = "XXX"
-            del cursor[key]
-
-        # Perform a checkpoint (we shouldn't write any underlying pages because
-        # of a checkpoint, either).
-        self.session.checkpoint("name=ckpt")
-
-        # Open and close a checkpoint cursor.
-        cursor = self.session.open_cursor(uri, None, "checkpoint=ckpt")
-        cursor.close()
-
-        self.session.close()
-
-        # The file should not have grown.
-        name = self.name
-        if self.type == "table:":
-            name = name + '.wt'
-        self.assertEquals(os.stat(name).st_size, 4*1024)
-
-    # Creating an object, inserting and removing records (that is, building an
-    # empty, dirty tree), shouldn't write any blocks.  This doesn't work for
-    # column-store objects, though, because deleting an object modifies the name
-    # space, which requires a write.
-    def test_empty(self):
-        if self.fmt == 'r':
-            return
-
-        for i in range(1,5):
-            self.empty()
-
 if __name__ == '__main__':
     wttest.run()
diff --git a/src/third_party/wiredtiger/test/suite/test_encrypt06.py b/src/third_party/wiredtiger/test/suite/test_encrypt06.py
index 7663a8d6d7e..520c18c04d6 100755
--- a/src/third_party/wiredtiger/test/suite/test_encrypt06.py
+++ b/src/third_party/wiredtiger/test/suite/test_encrypt06.py
@@ -45,7 +45,7 @@ class test_encrypt06(wttest.WiredTigerTestCase):
     # testing a potential misuse of the API: a table is opened with
     # with its own encryption options (different from the system),
     # but the indices and column groups do not specify encryption,
-    # so they'll get the system encryptor.
+    # so they may get the system encryptor.
     storagetype = [
         ('table', dict(
             uriprefix='table:', use_cg=False, use_index=False, match=True)),
@@ -66,25 +66,25 @@ class test_encrypt06(wttest.WiredTigerTestCase):
     ]
     encrypt = [
         ('none', dict(
-            sys_encrypt='none', sys_encrypt_args='', encryptmeta=False,
-            file0_encrypt='none', file0_encrypt_args='', encrypt0=False,
-            file1_encrypt='none', file1_encrypt_args='', encrypt1=False)),
+            sys_encrypt='none', sys_encrypt_args='',
+            table0_encrypt='none', table0_encrypt_args='',
+            table1_encrypt='none', table1_encrypt_args='')),
         ('rotn-implied', dict(
-            sys_encrypt='rotn', sys_encrypt_args=key11, encryptmeta=True,
-            file0_encrypt=None, file0_encrypt_args='', encrypt0=True,
-            file1_encrypt=None, file1_encrypt_args='', encrypt1=True)),
+            sys_encrypt='rotn', sys_encrypt_args=key11,
+            table0_encrypt=None, table0_encrypt_args='',
+            table1_encrypt=None, table1_encrypt_args='')),
         ('rotn-all', dict(
-            sys_encrypt='rotn', sys_encrypt_args=key11, encryptmeta=True,
-            file0_encrypt='rotn', file0_encrypt_args=key13, encrypt0=True,
-            file1_encrypt='rotn', file1_encrypt_args=key13, encrypt1=True)),
+            sys_encrypt='rotn', sys_encrypt_args=key11,
+            table0_encrypt='rotn', table0_encrypt_args=key13,
+            table1_encrypt='rotn', table1_encrypt_args=key13)),
         ('rotn-sys', dict(
-            sys_encrypt='rotn', sys_encrypt_args=key11, encryptmeta=True,
-            file0_encrypt='none', file0_encrypt_args='', encrypt0=False,
-            file1_encrypt='none', file1_encrypt_args='', encrypt1=False)),
-        ('rotn-file0', dict(
-            sys_encrypt='rotn', sys_encrypt_args=key11, encryptmeta=True,
-            file0_encrypt='rotn', file0_encrypt_args=key13, encrypt0=True,
-            file1_encrypt='none', file1_encrypt_args='', encrypt1=False)),
+            sys_encrypt='rotn', sys_encrypt_args=key11,
+            table0_encrypt='none', table0_encrypt_args='',
+            table1_encrypt='none', table1_encrypt_args='')),
+        ('rotn-table0', dict(
+            sys_encrypt='rotn', sys_encrypt_args=key11,
+            table0_encrypt='rotn', table0_encrypt_args=key13,
+            table1_encrypt='none', table1_encrypt_args='')),
     ]
     scenarios = make_scenarios(encrypt, storagetype)
     nrecords = 1000
@@ -92,14 +92,14 @@ class test_encrypt06(wttest.WiredTigerTestCase):
     def conn_extensions(self, extlist):
         extlist.skip_if_missing = True
         extlist.extension('encryptors', self.sys_encrypt)
-        extlist.extension('encryptors', self.file0_encrypt)
-        extlist.extension('encryptors', self.file1_encrypt)
+        extlist.extension('encryptors', self.table0_encrypt)
+        extlist.extension('encryptors', self.table1_encrypt)
 
     def conn_config(self):
         return 'encryption=(name={0}{1}),'.format(
             self.sys_encrypt, self.sys_encrypt_args)
 
-    def encrypt_file_params(self, name, args):
+    def encrypt_table_params(self, name, args):
         if name == None:
             return ''
         else:
@@ -116,63 +116,85 @@ class test_encrypt06(wttest.WiredTigerTestCase):
                 return True
         return False
 
-    def expected_encryption(self, exp):
-        expect = exp
-        # If we're expecting it to be unencrypted, but we (errantly)
-        # did not specify encryption on indices/columngroups,
-        # then column groups (if they exist) will be encrypted -
-        # there will be no data in the main table to be unencrypted.
-        if self.sys_encrypt != 'none' and not self.match and self.use_cg:
-            expect = True
-        return expect
+    def visible_data(self, table_setting):
+        if table_setting == None:
+            # No table encryption explicitly set, so we use the system setting
+            visible = (self.sys_encrypt == 'none')
+        else:
+            visible = (table_setting == 'none')
+        return visible
+
+    def visible_name(self, table_setting, iskey):
+        if table_setting == None:
+            # No table encryption explicitly set, so we use the system setting
+            visible = (self.sys_encrypt == 'none')
+        else:
+            visible = (table_setting == 'none')
+
+        # If we have everything in a column group, the key name will not
+        # be stored in the column group files.  It will be stored in the
+        # system metadata, if that is not encrypted.
+        if iskey and self.use_cg and self.sys_encrypt != 'none':
+            visible = False
+        return visible
 
     # Create a table, add key/values with specific lengths, then verify them.
     def test_encrypt(self):
         name0 = 'test_encrypt06-0'
         name1 = 'test_encrypt06-1'
 
-        enc0 = self.encrypt_file_params(self.file0_encrypt,
-                                        self.file0_encrypt_args)
-        enc1 = self.encrypt_file_params(self.file1_encrypt,
-                                        self.file1_encrypt_args)
+        enc0 = self.encrypt_table_params(self.table0_encrypt,
+                                        self.table0_encrypt_args)
+        enc1 = self.encrypt_table_params(self.table1_encrypt,
+                                        self.table1_encrypt_args)
 
         # This is the clear text that we'll be looking for
         txt0 = 'AbCdEfG'
         txt1 = 'aBcDeFg'
+        keyname0 = 'MyKey0Name'
+        keyname1 = 'MyKey1Name'
+        valname0 = 'MyValue0Name'
+        valname1 = 'MyValue1Name'
 
         # Make a bunch of column group and indices,
         # we want to see if any information is leaked anywhere.
+        # The key column and one of the value columns is given a name
+        # we will look for as clear text.
         sharedparam = 'key_format=S,value_format=SSSS,' + \
-                      'columns=(MyKeyName,v0,v1,v2,v3),'
+                      'columns=({},{},v1,v2,v3),'
 
         s = self.session
         pfx = self.uriprefix
 
         cgparam = 'colgroups=(g00,g01)' if self.use_cg else ''
-        s.create(pfx + name0, sharedparam + cgparam + enc0)
+        s.create(pfx + name0, sharedparam.format(keyname0, valname0) + \
+                 cgparam + enc0)
 
-        # Having unmatched encryption for colgroup or index is
-        # not recommended, but we check it.
         if not self.match:
             enc0 = ''
         if self.use_cg:
-            s.create('colgroup:' + name0 + ':g00', 'columns=(v0,v1)' + enc0)
+            s.create('colgroup:' + name0 + ':g00',
+                     'columns=({},v1)'.format(valname0) + enc0)
             s.create('colgroup:' + name0 + ':g01', 'columns=(v2,v3)' + enc0)
         if self.use_index:
-            s.create('index:' + name0 + ':i00', 'columns=(v0)' + enc0)
+            s.create('index:' + name0 + ':i00',
+                     'columns=({})'.format(valname0) + enc0)
             s.create('index:' + name0 + ':i01', 'columns=(v1,v2)' + enc0)
             s.create('index:' + name0 + ':i02', 'columns=(v3)' + enc0)
 
         cgparam = 'colgroups=(g10,g11)' if self.use_cg else ''
-        s.create(pfx + name1, sharedparam + cgparam + enc1)
+        s.create(pfx + name1, sharedparam.format(keyname1, valname1) + \
+                 cgparam + enc1)
 
         if not self.match:
             enc1 = ''
         if self.use_cg:
-            s.create('colgroup:' + name1 + ':g10', 'columns=(v0,v1)' + enc1)
+            s.create('colgroup:' + name1 + ':g10',
+                     'columns=({},v1)'.format(valname1) + enc1)
             s.create('colgroup:' + name1 + ':g11', 'columns=(v2,v3)' + enc1)
         if self.use_index:
-            s.create('index:' + name1 + ':i10', 'columns=(v0)' + enc1)
+            s.create('index:' + name1 + ':i10',
+                     'columns=({})'.format(valname1) + enc1)
             s.create('index:' + name1 + ':i11', 'columns=(v1,v2)' + enc1)
             s.create('index:' + name1 + ':i12', 'columns=(v3)' + enc1)
 
@@ -192,13 +214,40 @@ class test_encrypt06(wttest.WiredTigerTestCase):
         # Force everything to disk so we can examine it
         self.close_conn()
 
-        self.assertEqual(self.encryptmeta,
-                         not self.match_string_in_rundir('MyKeyName'))
-
-        self.assertEqual(self.expected_encryption(self.encrypt0),
-                         not self.match_string_in_rundir(txt0))
-        self.assertEqual(self.expected_encryption(self.encrypt1),
-                         not self.match_string_in_rundir(txt1))
+        if self.match:
+            # Key and value names are encrypted according to the
+            # encryption level on the associated table.
+            self.assertEqual(self.visible_data(self.table0_encrypt),
+                self.match_string_in_rundir(txt0))
+            self.assertEqual(self.visible_name(self.table0_encrypt, True),
+                self.match_string_in_rundir(keyname0))
+            self.assertEqual(self.visible_name(self.table0_encrypt, False),
+                self.match_string_in_rundir(valname0))
+
+            self.assertEqual(self.visible_data(self.table1_encrypt),
+                self.match_string_in_rundir(txt1))
+            self.assertEqual(self.visible_name(self.table1_encrypt, True),
+                self.match_string_in_rundir(keyname1))
+            self.assertEqual(self.visible_name(self.table1_encrypt, False),
+                self.match_string_in_rundir(valname1))
+        else:
+            # If the encryption config for indices and column groups is blank,
+            # we make a conservative check - if we specified encryption on the
+            # table, none of our data or key/value names should be exposed.
+            #
+            # If we have system encryption on, set table encryption to 'none',
+            # and set the index or column group config to blank, we technically
+            # should get no encryption for names or data. That currently
+            # doesn't work (CGs and indices instead will be encrypted),
+            # so we don't cover that case.
+            if self.table0_encrypt != 'none':
+                self.assertFalse(self.match_string_in_rundir(txt0))
+                self.assertFalse(self.match_string_in_rundir(keyname0))
+                self.assertFalse(self.match_string_in_rundir(valname0))
+            if self.table1_encrypt != 'none':
+                self.assertFalse(self.match_string_in_rundir(txt1))
+                self.assertFalse(self.match_string_in_rundir(keyname1))
+                self.assertFalse(self.match_string_in_rundir(valname1))
 
 if __name__ == '__main__':
     wttest.run()
diff --git a/src/third_party/wiredtiger/test/suite/test_timestamp09.py b/src/third_party/wiredtiger/test/suite/test_timestamp09.py
index c4b545fe2c1..efc081c29f4 100644
--- a/src/third_party/wiredtiger/test/suite/test_timestamp09.py
+++ b/src/third_party/wiredtiger/test/suite/test_timestamp09.py
@@ -165,10 +165,9 @@ class test_timestamp09(wttest.WiredTigerTestCase, suite_subprocess):
         # Read timestamp >= Oldest timestamp
         self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(7) +
             ',stable_timestamp=' + timestamp_str(7))
-        self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
-            lambda: self.session.begin_transaction('read_timestamp=' +
-                timestamp_str(6)),
-                '/less than the oldest timestamp/')
+        with self.expectedStdoutPattern('less than the oldest timestamp'):
+            self.assertRaisesException(wiredtiger.WiredTigerError,
+                lambda: self.session.begin_transaction('read_timestamp=' + timestamp_str(6)))
 
         # c[8] is not visible at read_timestamp < 8
         self.session.begin_transaction('read_timestamp=' + timestamp_str(7))
@@ -189,10 +188,9 @@ class test_timestamp09(wttest.WiredTigerTestCase, suite_subprocess):
         # We can move the oldest timestamp backwards with "force"
         self.conn.set_timestamp(
             'oldest_timestamp=' + timestamp_str(5) + ',force')
-        self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
-            lambda: self.session.begin_transaction('read_timestamp=' +
-                timestamp_str(4)),
-                '/less than the oldest timestamp/')
+        with self.expectedStdoutPattern('less than the oldest timestamp'):
+            self.assertRaisesException(wiredtiger.WiredTigerError,
+                lambda: self.session.begin_transaction('read_timestamp=' + timestamp_str(4)))
         self.session.begin_transaction('read_timestamp=' + timestamp_str(6))
         self.assertTimestampsEqual(
             self.conn.query_timestamp('get=oldest_reader'), timestamp_str(6))
diff --git a/src/third_party/wiredtiger/test/utility/parse_opts.c b/src/third_party/wiredtiger/test/utility/parse_opts.c
index c5bb1a83148..06d9ea31538 100644
--- a/src/third_party/wiredtiger/test/utility/parse_opts.c
+++ b/src/third_party/wiredtiger/test/utility/parse_opts.c
@@ -44,6 +44,7 @@ testutil_parse_opts(int argc, char * const *argv, TEST_OPTS *opts)
 	opts->running = true;
 	opts->verbose = false;
 
+	opts->argv0 = argv[0];
 	opts->progname = testutil_set_progname(argv);
 
 	testutil_print_command_line(argc, argv);
diff --git a/src/third_party/wiredtiger/test/utility/test_util.h b/src/third_party/wiredtiger/test/utility/test_util.h
index 27310de0006..7aa4eaecc0f 100644
--- a/src/third_party/wiredtiger/test/utility/test_util.h
+++ b/src/third_party/wiredtiger/test/utility/test_util.h
@@ -49,7 +49,9 @@
 /* Generic option parsing structure shared by all test cases. */
 typedef struct {
 	char  *home;
-	const char  *progname;
+	const char  *argv0;	/* Exec name */
+	const char  *progname;	/* Truncated program name */
+
 	enum {	TABLE_COL=1,	/* Fixed-length column store */
 		TABLE_FIX=2,	/* Variable-length column store */
 		TABLE_ROW=3	/* Row-store */
diff --git a/src/third_party/wiredtiger/tools/optrack/find-latency-spikes.py b/src/third_party/wiredtiger/tools/optrack/find-latency-spikes.py
index 7409ab62243..1c030721787 100755
--- a/src/third_party/wiredtiger/tools/optrack/find-latency-spikes.py
+++ b/src/third_party/wiredtiger/tools/optrack/find-latency-spikes.py
@@ -864,7 +864,7 @@ def generateTSSlicesForBuckets():
                               numBuckets, "Generating timeline charts");
 
     for i, fname in returnValues.items():
-        bucketFilenames.append(str(fname.value));
+        bucketFilenames.append(fname.value.decode());
     print(color.END);
 
     return bucketFilenames;