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#!/usr/bin/env python
#
# Public Domain 2014-present 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_txn14.py
# Transactions: commits and rollbacks
#
import fnmatch, os, shutil, time
from suite_subprocess import suite_subprocess
from wtscenario import make_scenarios
import wttest
class test_txn14(wttest.WiredTigerTestCase, suite_subprocess):
t1 = 'table:test_txn14_1'
create_params = 'key_format=i,value_format=i'
entries = 10000
extra_entries = 5
conn_config = 'log=(archive=false,enabled,file_max=100K)'
sync_list = [
('write', dict(sync='off')),
('sync', dict(sync='on')),
('bg', dict(sync='background')),
]
scenarios = make_scenarios(sync_list)
def simulate_crash_restart(self, olddir, newdir):
''' Simulate a crash from olddir and restart in newdir. '''
# with the connection still open, copy files to new directory
shutil.rmtree(newdir, ignore_errors=True)
os.mkdir(newdir)
for fname in os.listdir(olddir):
fullname = os.path.join(olddir, fname)
# Skip lock file on Windows since it is locked
if os.path.isfile(fullname) and \
"WiredTiger.lock" not in fullname and \
"Tmplog" not in fullname and \
"Preplog" not in fullname:
shutil.copy(fullname, newdir)
#
# close the original connection and open to new directory
# NOTE: This really cannot test the difference between the
# write-no-sync (off) version of log_flush and the sync
# version since we're not crashing the system itself.
#
self.close_conn()
self.conn = self.setUpConnectionOpen(newdir)
self.session = self.setUpSessionOpen(self.conn)
def test_log_flush(self):
# Here's the strategy:
# - Create a table.
# - Insert data into table.
# - Call log_flush.
# - Simulate a crash and restart
# - Make recovery run.
# - Confirm flushed data is in the table.
#
self.session.create(self.t1, self.create_params)
c = self.session.open_cursor(self.t1, None, None)
for i in range(self.entries):
c[i] = i + 1
cfgarg='sync=%s' % self.sync
self.pr('cfgarg ' + cfgarg)
self.session.log_flush(cfgarg)
for i in range(self.extra_entries):
c[i+self.entries] = i + self.entries + 1
c.close()
self.session.log_flush(cfgarg)
if self.sync == 'background':
# If doing a background flush, wait 30 seconds. I have seen an
# individual log file's fsync take more than a second on some
# systems, and we've seen timeouts at 10 seconds on systems
# with slow I/O. So give it time to flush perhaps a few files.
self.session.transaction_sync('timeout_ms=30000')
self.simulate_crash_restart(".", "RESTART")
c = self.session.open_cursor(self.t1, None, None)
i = 0
for key, value in c:
self.assertEqual(i, key)
self.assertEqual(i+1, value)
i += 1
all = self.entries + self.extra_entries
self.assertEqual(i, all)
c.close()
if __name__ == '__main__':
wttest.run()
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