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#!/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_txn15.py
# Transactions: different sync modes
#
import fnmatch, os, shutil, time
from suite_subprocess import suite_subprocess
from wiredtiger import stat
from wtscenario import multiply_scenarios, number_scenarios, prune_scenarios
import wttest
class test_txn15(wttest.WiredTigerTestCase, suite_subprocess):
uri = 'table:test_txn15_1'
create_params = 'key_format=i,value_format=i'
entries = 100
# Turn on logging for this test.
def conn_config(self, dir):
return 'statistics=(fast),' + \
'log=(archive=false,enabled,file_max=100K),' + \
'use_environment=false,' + \
'transaction_sync=(enabled=%s),' % self.conn_enable + \
'transaction_sync=(method=%s),' % self.conn_method
conn_sync_enabled = [
('en_off', dict(conn_enable='false')),
('en_on', dict(conn_enable='true')),
]
conn_sync_method = [
('m_dsync', dict(conn_method='dsync')),
('m_fsync', dict(conn_method='fsync')),
('m_none', dict(conn_method='none')),
]
begin_sync = [
('b_method', dict(begin_sync='sync=true')),
('b_none', dict(begin_sync=None)),
('b_off', dict(begin_sync='sync=false')),
]
# We don't test 'background' in this test. It isn't applicable for the
# particulars here and reduces the number of scenarios. It is an error for
# both begin_transaction and commit_transaction to have explicit settings.
# We will avoid that in the code below.
commit_sync = [
('c_method', dict(commit_sync='sync=on')),
('c_none', dict(commit_sync=None)),
('c_off', dict(commit_sync='sync=off')),
]
scenarios = multiply_scenarios('.', conn_sync_enabled, conn_sync_method,
begin_sync, commit_sync)
# Given the different configuration settings determine if this group
# of settings would result in either a wait for write or sync.
# Returns None, "write" or "sync". None means no waiting for either.
# "write" means wait for write, but not sync. "sync" means both
# write and sync.
def syncLevel(self):
# We know that we skip illegal settings where both begin and commit
# have explicit settings. So we don't have to check that here.
# If the transaction doesn't override it, then it is whatever is
# set on the connection.
if self.begin_sync == None and self.commit_sync == None:
if self.conn_enable == 'false':
return None
# Only fsync implies sync. Both dsync and none (meaning
# write-no-sync) imply write.
if self.conn_method == 'fsync':
return 'sync'
else:
return 'write'
# If the user explicitly turns it off for the transaction, it is None.
if self.begin_sync == 'sync=false' or self.commit_sync == 'sync=off':
return None
# If we get here, the transaction turns sync on in some way so we
# only need to check the method type.
if self.conn_method == 'fsync':
return 'sync'
else:
return 'write'
def test_sync_ops(self):
# It is illegal to set a sync option on both begin and commit.
# If the scenario multiplication sets both, just return.
if self.begin_sync != None and self.commit_sync != None:
return
self.session.create(self.uri, self.create_params)
stat_cursor = self.session.open_cursor('statistics:', None, None)
#
# !!! Implementation detail here. We record the stats that
# indicate the code went through the release code explicitly
# (instead of the worker thread). They indicate we came
# through the special case path for handling a flush or sync.
#
write1 = stat_cursor[stat.conn.log_release_write_lsn][2]
sync1 = stat_cursor[stat.conn.log_sync][2]
stat_cursor.close()
c = self.session.open_cursor(self.uri, None, None)
self.session.begin_transaction(self.begin_sync)
for i in range(self.entries):
c[i] = i + 1
self.session.commit_transaction(self.commit_sync)
c.close()
stat_cursor = self.session.open_cursor('statistics:', None, None)
write2 = stat_cursor[stat.conn.log_release_write_lsn][2]
sync2 = stat_cursor[stat.conn.log_sync][2]
stat_cursor.close()
checks = self.syncLevel()
# Checking sync implies the write.
# If we did special processing the stats should not be the
# same. Otherwise the number of writes should be equal.
# We do not check for syncs being equal because worker threads
# also increment that stat when they sync and close a log file.
if checks != None:
self.assertNotEqual(write1, write2)
if checks == 'sync':
self.assertNotEqual(sync1, sync2)
else:
self.assertEqual(write1, write2)
if __name__ == '__main__':
wttest.run()
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