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

2 files changed, 164 insertions, 0 deletions

diff --git a/src/third_party/wiredtiger/examples/python/ex_access.py b/src/third_party/wiredtiger/examples/python/ex_access.py
new file mode 100755
index 00000000000..aa99c1f6547
--- /dev/null
+++ b/src/third_party/wiredtiger/examples/python/ex_access.py
@@ -0,0 +1,55 @@
+#!/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.
+#
+
+import os
+from wiredtiger import wiredtiger_open
+
+# Connect to the database and open a session
+os.system('rm -rf WT_HOME')
+os.makedirs('WT_HOME')
+
+conn = wiredtiger_open('WT_HOME', 'create')
+session = conn.open_session()
+
+# Create a simple table
+session.create('table:T', 'key_format=S,value_format=S')
+
+# Open a cursor and insert a record
+cursor = session.open_cursor('table:T', None)
+
+cursor.set_key('key1')
+cursor.set_value('value1')
+cursor.insert()
+
+# Iterate through the records
+cursor.reset()
+for key, value in cursor:
+    print('Got record: %s : %s' % (key, value))
+
+conn.close()
diff --git a/src/third_party/wiredtiger/examples/python/ex_stat.py b/src/third_party/wiredtiger/examples/python/ex_stat.py
new file mode 100755
index 00000000000..10f1d6d597c
--- /dev/null
+++ b/src/third_party/wiredtiger/examples/python/ex_stat.py
@@ -0,0 +1,109 @@
+#!/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.
+#
+# ex_stat.py
+#      This is an example demonstrating how to query database statistics.
+
+import os
+from wiredtiger import wiredtiger_open,WIREDTIGER_VERSION_STRING,stat
+
+
+def main():
+    # Create a clean test directory for this run of the test program
+    os.system('rm -rf WT_HOME')
+    os.makedirs('WT_HOME')
+    # Connect to the database and open a session
+    conn = wiredtiger_open('WT_HOME', 'create,statistics=(all)')
+    session = conn.open_session()
+
+    # Create a simple table
+    session.create('table:access', 'key_format=S,value_format=S')
+
+    # Open a cursor and insert a record
+    cursor = session.open_cursor('table:access', None)
+
+    cursor['key'] = 'value'
+    cursor.close()
+
+    session.checkpoint()
+    print WIREDTIGER_VERSION_STRING
+    print_database_stats(session)
+    print_file_stats(session)
+    print_overflow_pages(session)
+    print_derived_stats(session)
+    conn.close()
+
+
+def print_database_stats(session):
+    statcursor = session.open_cursor("statistics:")
+    print_cursor(statcursor)
+    statcursor.close()
+
+
+def print_file_stats(session):
+    fstatcursor = session.open_cursor("statistics:table:access")
+    print_cursor(fstatcursor)
+    fstatcursor.close()
+
+
+def print_overflow_pages(session):
+    ostatcursor = session.open_cursor("statistics:table:access")
+    val = ostatcursor[stat.dsrc.btree_overflow]
+    if val != 0:
+        print '%s=%s' % (str(val[0]), str(val[1]))
+    ostatcursor.close()
+
+
+def print_derived_stats(session):
+    dstatcursor = session.open_cursor("statistics:table:access")
+    ckpt_size = dstatcursor[stat.dsrc.block_checkpoint_size][1]
+    file_size = dstatcursor[stat.dsrc.block_size][1]
+    percent = 0
+    if file_size != 0:
+        percent = 100 * ((float(file_size) - float(ckpt_size)) / float(file_size))
+    print "Table is %%%s fragmented" % str(percent)
+
+    app_insert = int(dstatcursor[stat.dsrc.cursor_insert_bytes][1])
+    app_remove = int(dstatcursor[stat.dsrc.cursor_remove_bytes][1])
+    app_update = int(dstatcursor[stat.dsrc.cursor_update_bytes][1])
+    fs_writes = int(dstatcursor[stat.dsrc.cache_bytes_write][1])
+
+    if app_insert + app_remove + app_update != 0:
+        print "Write amplification is " + '{:.2f}'.format(fs_writes / (app_insert + app_remove + app_update))
+    dstatcursor.close()
+
+
+def print_cursor(mycursor):
+    while mycursor.next() == 0:
+        val = mycursor.get_value()
+        if val[1] != '0':
+            print '%s=%s' % (str(val[0]), str(val[1]))
+
+if __name__ == "__main__":
+    main()
+