Import wiredtiger-wiredtiger-2.7.0-505-g7fea169.tar.gz from wiredtiger branch mongodb-3.4

ref: 44463c5..7fea169

WT-2355       Fix minor scratch buffer usage in logging.
WT-2348       xargs -P isn't portable
WT-2347       Java: schema format edge cases
WT-2344       OS X compiler warning
WT-2342       Enhance wtperf to support background create and drop operations
WT-2340       Add logging guarantee assertions, whitespace
WT-2339       format post-rebalance verify failure (stress run #11586)
WT-2338       Disable using pre-allocated log files when backup cursor is open
WT-2335       NULL pointer crash in config_check_search with invalid configuration string
WT-2333       Add a flag so drop doesn't block
WT-2332       Bug in logging write-no-sync mode
WT-2331       Checking of search() result for reference cursors before join()
WT-2328       schema drop does direct unlink, it should use a block manager interface.
WT-2326       Change WTPERF to use new memory allocation functions instead of the standard
WT-2321       WT-2321: race between eviction and worker threads on the eviction queue
WT-2320       Only check copyright when cutting releases
WT-2316       stress test failure: WT_CURSOR.prev out-of-order returns
WT-2314       page-swap error handling is inconsistent
WT-2313       sweep-server: conn_dhandle.c, 610: dhandle != conn->cache->evict_file_next
WT-2312       re-creating a deleted column-store page can corrupt the in-memory tree
WT-2308       custom extractor for ref_cursors in join cursor
WT-2305       Fix coverity scan issues on 23/12/2015
WT-2296       New log algorithm needs improving for sync/flush settings
WT-2295       WT_SESSION.create does a full-scan of the main table
WT-2287       WT_SESSION.rebalance
WT-2275       broken DB after application crash
WT-2267       Improve wtperf throttling implementation to provide steady load
WT-2247       variable-length column-store in-memory page splits
WT-2242       WiredTiger treats dead trees the same as other trees in eviction
WT-2142       Connection cleanup in Python tests
WT-2073       metadata cleanups
WT-1801       Add a directory sync after rollback of a WT_SESSION::rename operation
WT-1517       schema format edge cases
SERVER-22064  Coverity analysis defect 77699: Unchecked return value
SERVER-21619  sys-perf: WT crash during core_workloads_WT execution

1 files changed, 96 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/test/suite/test_nsnap03.py b/src/third_party/wiredtiger/test/suite/test_nsnap03.py
new file mode 100644
index 00000000000..0e853522940
--- /dev/null
+++ b/src/third_party/wiredtiger/test/suite/test_nsnap03.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+#
+# Public Domain 2014-2016 MongoDB, Inc.
+# Public Domain 2008-2014 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.
+#
+# test_nsnap03.py
+#   Named snapshots: Access and create from multiple sessions
+
+from suite_subprocess import suite_subprocess
+from wtscenario import multiply_scenarios, number_scenarios
+from helper import simple_populate
+import wiredtiger, wttest
+
+class test_nsnap03(wttest.WiredTigerTestCase, suite_subprocess):
+    tablename = 'test_nsnap03'
+    uri = 'table:' + tablename
+    nrows = 300
+    nrows_per_snap = 10
+    nsnapshots = 10
+
+    def check_named_snapshot(self, snapshot, expected):
+        new_session = self.conn.open_session()
+        new_session.begin_transaction("snapshot=" + str(snapshot))
+        c = new_session.open_cursor(self.uri)
+        count = 0
+        for row in c:
+            count += 1
+        new_session.commit_transaction()
+        # print "Checking snapshot %d, expect %d, found %d" % (snapshot, expected, count)
+        self.assertEqual(count, expected)
+        new_session.close()
+
+    def test_named_snapshots(self):
+        # Populate a table
+        end = start = 0
+        simple_populate(self, self.uri, 'key_format=i', 0)
+
+        # Now run a workload:
+        # every iteration:
+        # create a new named snapshot, N
+        # append 20 rows and delete the first 10
+        # verify that every snapshot N contains the expected number of rows
+        # if there are more than 10 snapshots active, drop the first half
+        snapshots = []
+        c = self.session.open_cursor(self.uri)
+        for n in xrange(self.nrows / self.nrows_per_snap):
+            if len(snapshots) > self.nsnapshots:
+                middle = len(snapshots) / 2
+                dropcfg = ",drop=(to=%d)" % snapshots[middle][0]
+                snapshots = snapshots[middle + 1:]
+            else:
+                dropcfg = ""
+
+            # Close and start a new session every three snapshots
+            if n % 3 == 0:
+                self.session.close()
+                self.session = self.conn.open_session()
+                c = self.session.open_cursor(self.uri)
+
+            self.session.snapshot("name=%d%s" % (n, dropcfg))
+            snapshots.append((n, end - start))
+            for i in xrange(2 * self.nrows_per_snap):
+                c[end + i] = "some value"
+            end += 2 * self.nrows_per_snap
+            for i in xrange(self.nrows_per_snap):
+                del c[start + i]
+            start += self.nrows_per_snap
+
+            for snapshot, expected in snapshots:
+                self.check_named_snapshot(snapshot, expected)
+
+if __name__ == '__main__':
+    wttest.run()