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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_txn05.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_txn05(wttest.WiredTigerTestCase, suite_subprocess):
logmax = "100K"
tablename = 'test_txn05'
uri = 'table:' + tablename
archive_list = ['true', 'false']
sync_list = [
'(method=dsync,enabled)',
'(method=fsync,enabled)',
'(method=none,enabled)',
'(enabled=false)'
]
types = [
('row', dict(tabletype='row',
create_params = 'key_format=i,value_format=i')),
('var', dict(tabletype='var',
create_params = 'key_format=r,value_format=i')),
('fix', dict(tabletype='fix',
create_params = 'key_format=r,value_format=8t')),
]
op1s = [
('trunc-all', dict(op1=('all', 0))),
('trunc-both', dict(op1=('both', 2))),
('trunc-start', dict(op1=('start', 2))),
('trunc-stop', dict(op1=('stop', 2))),
]
txn1s = [('t1c', dict(txn1='commit')), ('t1r', dict(txn1='rollback'))]
scenarios = make_scenarios(types, op1s, txn1s)
# Overrides WiredTigerTestCase
def setUpConnectionOpen(self, dir):
self.home = dir
# Cycle through the different transaction_sync values in a
# deterministic manner.
self.txn_sync = self.sync_list[
self.scenario_number % len(self.sync_list)]
self.backup_dir = os.path.join(self.home, "WT_BACKUP")
conn_params = \
'log=(archive=false,enabled,file_max=%s),' % self.logmax + \
'create,error_prefix="%s: ",' % self.shortid() + \
'transaction_sync="%s",' % self.txn_sync
# print "Creating conn at '%s' with config '%s'" % (dir, conn_params)
conn = self.wiredtiger_open(dir, conn_params)
self.pr(`conn`)
self.session2 = conn.open_session()
return conn
# Check that a cursor (optionally started in a new transaction), sees the
# expected values.
def check(self, session, txn_config, expected):
if txn_config:
session.begin_transaction(txn_config)
c = session.open_cursor(self.uri, None)
actual = dict((k, v) for k, v in c if v != 0)
# Search for the expected items as well as iterating
for k, v in expected.iteritems():
self.assertEqual(c[k], v)
c.close()
if txn_config:
session.commit_transaction()
self.assertEqual(actual, expected)
# Check the state of the system with respect to the current cursor and
# different isolation levels.
def check_all(self, current, committed):
# Transactions see their own changes.
# Read-uncommitted transactions see all changes.
# Snapshot and read-committed transactions should not see changes.
self.check(self.session, None, current)
self.check(self.session2, "isolation=snapshot", committed)
self.check(self.session2, "isolation=read-committed", committed)
self.check(self.session2, "isolation=read-uncommitted", current)
# Opening a clone of the database home directory should run
# recovery and see the committed results.
self.backup(self.backup_dir)
backup_conn_params = 'log=(enabled,file_max=%s)' % self.logmax
backup_conn = self.wiredtiger_open(self.backup_dir, backup_conn_params)
try:
self.check(backup_conn.open_session(), None, committed)
finally:
backup_conn.close()
def check_log(self, committed):
self.backup(self.backup_dir)
#
# Open and close the backup connection a few times to force
# repeated recovery and log archiving even if later recoveries
# are essentially no-ops. Confirm that the backup contains
# the committed operations after recovery.
#
# Cycle through the different archive values in a
# deterministic manner.
self.archive = self.archive_list[
self.scenario_number % len(self.archive_list)]
backup_conn_params = \
'log=(enabled,file_max=%s,archive=%s)' % (self.logmax, self.archive)
orig_logs = fnmatch.filter(os.listdir(self.backup_dir), "*Log*")
endcount = 2
count = 0
while count < endcount:
backup_conn = self.wiredtiger_open(self.backup_dir,
backup_conn_params)
try:
self.check(backup_conn.open_session(), None, committed)
finally:
# Sleep long enough so that the archive thread is guaranteed
# to run before we close the connection.
time.sleep(1.0)
backup_conn.close()
count += 1
#
# Check logs after repeated openings. The first log should
# have been archived if configured. Subsequent openings would not
# archive because no checkpoint is written due to no modifications.
#
cur_logs = fnmatch.filter(os.listdir(self.backup_dir), "*Log*")
for o in orig_logs:
if self.archive == 'true':
self.assertEqual(False, o in cur_logs)
else:
self.assertEqual(True, o in cur_logs)
#
# Run printlog and make sure it exits with zero status.
#
self.runWt(['-h', self.backup_dir, 'printlog'], outfilename='printlog.out')
def test_ops(self):
# print "Creating %s with config '%s'" % (self.uri, self.create_params)
self.session.create(self.uri, self.create_params)
# Set up the table with entries for 1-5.
# We then truncate starting or ending in various places.
c = self.session.open_cursor(self.uri, None)
current = {1:1, 2:1, 3:1, 4:1, 5:1}
for k in current:
c[k] = 1
committed = current.copy()
ops = (self.op1, )
txns = (self.txn1, )
for i, ot in enumerate(zip(ops, txns)):
self.session.begin_transaction()
ok, txn = ot
# print '%d: %s(%d)[%s]' % (i, ok[0], ok[1], txn)
op, k = ok
# print '%d: %s(%d)[%s]' % (i, ok[0], ok[1], txn)
if op == 'stop':
c.set_key(k)
self.session.truncate(None, None, c, None)
kstart = 1
kstop = k
elif op == 'start':
c.set_key(k)
self.session.truncate(None, c, None, None)
kstart = k
kstop = len(current)
elif op == 'both':
c2 = self.session.open_cursor(self.uri, None)
# For both, the key given is the start key. Add 2
# for the stop key.
kstart = k
kstop = k + 2
c.set_key(kstart)
c2.set_key(kstop)
self.session.truncate(None, c, c2, None)
c2.close()
elif op == 'all':
c2 = self.session.open_cursor(self.uri, None)
kstart = 1
kstop = len(current)
c.set_key(kstart)
c2.set_key(kstop)
self.session.truncate(None, c, c2, None)
c2.close()
while (kstart <= kstop):
del current[kstart]
kstart += 1
# print current
# Check the state after each operation.
self.check_all(current, committed)
if txn == 'commit':
committed = current.copy()
self.session.commit_transaction()
elif txn == 'rollback':
current = committed.copy()
self.session.rollback_transaction()
# Check the state after each commit/rollback.
self.check_all(current, committed)
# Check the log state after the entire op completes
# and run recovery.
if self.scenario_number % (len(test_txn05.scenarios) / 100 + 1) == 0:
self.check_log(committed)
if __name__ == '__main__':
wttest.run()
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