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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_txn16.py
# Recovery: Test that toggling between logging and not logging does not
# continue to generate more log files.
#
import fnmatch, os, shutil, time
from suite_subprocess import suite_subprocess
import wttest
class test_txn16(wttest.WiredTigerTestCase, suite_subprocess):
t1 = 'table:test_txn16_1'
t2 = 'table:test_txn16_2'
t3 = 'table:test_txn16_3'
nentries = 1000
create_params = 'key_format=i,value_format=i'
# Set the log file size small so we generate checkpoints
# with LSNs in different files.
conn_config = 'config_base=false,' + \
'log=(archive=false,enabled,file_max=100K),' + \
'transaction_sync=(method=dsync,enabled)'
conn_on = 'config_base=false,' + \
'log=(archive=false,enabled,file_max=100K),' + \
'transaction_sync=(method=dsync,enabled)'
conn_off = 'config_base=false,log=(enabled=false)'
def populate_table(self, uri):
self.session.create(uri, self.create_params)
c = self.session.open_cursor(uri, None, None)
# Populate with an occasional checkpoint to generate
# some varying LSNs.
for i in range(self.nentries):
c[i] = i + 1
if i % 900 == 0:
self.session.checkpoint()
c.close()
def copy_dir(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.
self.close_conn()
def run_toggle(self, homedir):
loop = 0
# Record original log files. There should never be overlap
# with these even after they're removed.
orig_logs = fnmatch.filter(os.listdir(homedir), "*gerLog*")
while loop < 3:
# Reopen with logging on to run recovery first time
on_conn = self.wiredtiger_open(homedir, self.conn_on)
on_conn.close()
if loop > 0:
# Get current log files.
cur_logs = fnmatch.filter(os.listdir(homedir), "*gerLog*")
scur = set(cur_logs)
sorig = set(orig_logs)
# There should never be overlap with the log files that
# were there originally. Mostly this checks that after
# opening with logging disabled and then re-enabled, we
# don't see log file 1.
self.assertEqual(scur.isdisjoint(sorig), True)
if loop > 1:
# We should be creating the same log files each time.
for l in cur_logs:
self.assertEqual(l in last_logs, True)
for l in last_logs:
self.assertEqual(l in cur_logs, True)
last_logs = cur_logs
loop += 1
# Remove all log files before opening without logging.
cur_logs = fnmatch.filter(os.listdir(homedir), "*gerLog*")
for l in cur_logs:
path=homedir + "/" + l
os.remove(path)
off_conn = self.wiredtiger_open(homedir, self.conn_off)
off_conn.close()
def test_recovery(self):
''' Check log file creation when toggling. '''
# Here's the strategy:
# - With logging populate 4 tables. Checkpoint
# them at different times.
# - Copy to a new directory to simulate a crash.
# - Close the original connection.
# On both a "copy" to simulate a crash and the original (3x):
# - Record log files existing.
# - Reopen with logging to run recovery. Close connection.
# - Record log files existing.
# - Remove all log files.
# - Open connection with logging disabled.
# - Record log files existing. Verify we don't keep adding.
#
self.populate_table(self.t1)
self.populate_table(self.t2)
self.populate_table(self.t3)
self.copy_dir(".", "RESTART")
self.run_toggle(".")
self.run_toggle("RESTART")
if __name__ == '__main__':
wttest.run()
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