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#!/usr/bin/env python
#
# Public Domain 2014-2015 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_txn04.py
# Transactions: hot backup and recovery
#
import shutil, os
from suite_subprocess import suite_subprocess
from wiredtiger import wiredtiger_open
from wtscenario import multiply_scenarios, number_scenarios
import wttest
class test_txn04(wttest.WiredTigerTestCase, suite_subprocess):
logmax = "100K"
tablename = 'test_txn04'
uri = 'table:' + tablename
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 = [
('insert', dict(op1=('insert', 6))),
('update', dict(op1=('update', 2))),
('remove', dict(op1=('remove', 2))),
('trunc-stop', dict(op1=('stop', 2))),
]
txn1s = [('t1c', dict(txn1='commit')), ('t1r', dict(txn1='rollback'))]
scenarios = number_scenarios(multiply_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")
# Set archive false on the home directory.
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 = 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)
def hot_backup(self, backup_uri, committed):
# If we are backing up a target, assume the directory exists.
# We just use the wt backup command.
# A future test extension could also use a cursor.
cmd = '-h ' + self.home + ' backup '
if backup_uri != None:
cmd += '-t ' + backup_uri + ' '
else:
shutil.rmtree(self.backup_dir, ignore_errors=True)
os.mkdir(self.backup_dir)
cmd += self.backup_dir
self.runWt(cmd.split())
self.exception='false'
backup_conn_params = 'log=(enabled,file_max=%s)' % self.logmax
backup_conn = wiredtiger_open(self.backup_dir, backup_conn_params)
try:
self.check(backup_conn.open_session(), None, committed)
except:
self.exception='true'
finally:
backup_conn.close()
def test_ops(self):
self.session.create(self.uri, self.create_params)
c = self.session.open_cursor(self.uri, None, 'overwrite')
# Set up the table with entries for 1-5.
# We then truncate starting or ending in various places.
# We use the overwrite config so insert can update as needed.
current = {1:1, 2:1, 3:1, 4:1, 5:1}
c.set_value(1)
for k in current:
c.set_key(k)
c.insert()
committed = current.copy()
ops = (self.op1, )
txns = (self.txn1, )
for i, ot in enumerate(zip(ops, txns)):
# Perform a full hot backup of the original tables.
# The runWt command closes our connection and sessions so
# we need to reopen them here.
self.hot_backup(None, committed)
self.assertEqual(True, self.exception == 'false')
c = self.session.open_cursor(self.uri, None, 'overwrite')
c.set_value(1)
# Then do the given modification.
# Perform a targeted hot backup.
self.session.begin_transaction()
ok, txn = ot
op, k = ok
# print '%d: %s(%d)[%s]' % (i, ok[0], ok[1], txn)
if op == 'insert' or op == 'update':
c.set_value(i + 2)
c.set_key(k)
c.insert()
current[k] = i + 2
elif op == 'remove':
c.set_key(k)
c.remove()
if k in current:
del current[k]
elif op == 'stop':
# For both, the key given is the start key. Add 2
# for the stop key.
c.set_key(k)
kstart = 1
kstop = k
self.session.truncate(None, None, c, None)
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)
# Backup the target we modified. We expect that running
# recovery now will generate an exception if we committed.
# print 'Call hot_backup with ' + self.uri
self.hot_backup(self.uri, committed)
if txn == 'commit':
self.assertEqual(True, self.exception == 'true')
else:
self.assertEqual(True, self.exception == 'false')
if __name__ == '__main__':
wttest.run()
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