205 lines
8.0 KiB
Python
205 lines
8.0 KiB
Python
#!/usr/bin/env python
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#
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# Public Domain 2008-2014 WiredTiger, Inc.
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#
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# This is free and unencumbered software released into the public domain.
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#
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# Anyone is free to copy, modify, publish, use, compile, sell, or
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# distribute this software, either in source code form or as a compiled
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# binary, for any purpose, commercial or non-commercial, and by any
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# means.
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#
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# In jurisdictions that recognize copyright laws, the author or authors
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# of this software dedicate any and all copyright interest in the
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# software to the public domain. We make this dedication for the benefit
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# of the public at large and to the detriment of our heirs and
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# successors. We intend this dedication to be an overt act of
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# relinquishment in perpetuity of all present and future rights to this
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# software under copyright law.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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#
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# test_txn04.py
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# Transactions: hot backup and recovery
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#
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import shutil, os
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from suite_subprocess import suite_subprocess
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from wiredtiger import wiredtiger_open
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from wtscenario import multiply_scenarios, number_scenarios
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import wttest
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class test_txn04(wttest.WiredTigerTestCase, suite_subprocess):
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logmax = "100K"
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tablename = 'test_txn04'
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uri = 'table:' + tablename
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sync_list = ['dsync', 'fsync', 'none']
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types = [
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('row', dict(tabletype='row',
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create_params = 'key_format=i,value_format=i')),
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('var', dict(tabletype='var',
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create_params = 'key_format=r,value_format=i')),
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('fix', dict(tabletype='fix',
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create_params = 'key_format=r,value_format=8t')),
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]
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op1s = [
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('insert', dict(op1=('insert', 6))),
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('update', dict(op1=('update', 2))),
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('remove', dict(op1=('remove', 2))),
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('trunc-stop', dict(op1=('stop', 2))),
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]
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txn1s = [('t1c', dict(txn1='commit')), ('t1r', dict(txn1='rollback'))]
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scenarios = number_scenarios(multiply_scenarios('.', types, op1s, txn1s))
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# Overrides WiredTigerTestCase
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def setUpConnectionOpen(self, dir):
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self.home = dir
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# Cycle through the different transaction_sync values in a
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# deterministic manner.
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self.txn_sync = self.sync_list[
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self.scenario_number % len(self.sync_list)]
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self.backup_dir = os.path.join(self.home, "WT_BACKUP")
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# Set archive false on the home directory.
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conn_params = \
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'log=(archive=false,enabled,file_max=%s),' % self.logmax + \
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'create,error_prefix="%s: ",' % self.shortid() + \
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'transaction_sync="%s",' % self.txn_sync
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# print "Creating conn at '%s' with config '%s'" % (dir, conn_params)
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conn = wiredtiger_open(dir, conn_params)
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self.pr(`conn`)
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self.session2 = conn.open_session()
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return conn
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# Check that a cursor (optionally started in a new transaction), sees the
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# expected values.
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def check(self, session, txn_config, expected):
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if txn_config:
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session.begin_transaction(txn_config)
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c = session.open_cursor(self.uri, None)
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actual = dict((k, v) for k, v in c if v != 0)
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# Search for the expected items as well as iterating
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for k, v in expected.iteritems():
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self.assertEqual(c[k], v)
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c.close()
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if txn_config:
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session.commit_transaction()
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self.assertEqual(actual, expected)
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# Check the state of the system with respect to the current cursor and
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# different isolation levels.
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def check_all(self, current, committed):
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# Transactions see their own changes.
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# Read-uncommitted transactions see all changes.
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# Snapshot and read-committed transactions should not see changes.
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self.check(self.session, None, current)
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self.check(self.session2, "isolation=snapshot", committed)
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self.check(self.session2, "isolation=read-committed", committed)
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self.check(self.session2, "isolation=read-uncommitted", current)
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def hot_backup(self, backup_uri, committed):
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# If we are backing up a target, assume the directory exists.
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# We just use the wt backup command.
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# A future test extension could also use a cursor.
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cmd = '-h ' + self.home + ' backup '
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if backup_uri != None:
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cmd += '-t ' + backup_uri + ' '
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else:
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shutil.rmtree(self.backup_dir, ignore_errors=True)
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os.mkdir(self.backup_dir)
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cmd += self.backup_dir
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self.runWt(cmd.split())
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self.exception='false'
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backup_conn_params = 'log=(enabled,file_max=%s)' % self.logmax
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backup_conn = wiredtiger_open(self.backup_dir, backup_conn_params)
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try:
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self.check(backup_conn.open_session(), None, committed)
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except:
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self.exception='true'
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finally:
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backup_conn.close()
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def test_ops(self):
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self.session.create(self.uri, self.create_params)
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c = self.session.open_cursor(self.uri, None, 'overwrite')
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# Set up the table with entries for 1-5.
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# We then truncate starting or ending in various places.
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# We use the overwrite config so insert can update as needed.
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current = {1:1, 2:1, 3:1, 4:1, 5:1}
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c.set_value(1)
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for k in current:
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c.set_key(k)
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c.insert()
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committed = current.copy()
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ops = (self.op1, )
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txns = (self.txn1, )
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for i, ot in enumerate(zip(ops, txns)):
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# Perform a full hot backup of the original tables.
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# The runWt command closes our connection and sessions so
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# we need to reopen them here.
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self.hot_backup(None, committed)
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self.assertEqual(True, self.exception == 'false')
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c = self.session.open_cursor(self.uri, None, 'overwrite')
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c.set_value(1)
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# Then do the given modification.
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# Perform a targeted hot backup.
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self.session.begin_transaction()
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ok, txn = ot
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op, k = ok
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# print '%d: %s(%d)[%s]' % (i, ok[0], ok[1], txn)
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if op == 'insert' or op == 'update':
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c.set_value(i + 2)
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c.set_key(k)
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c.insert()
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current[k] = i + 2
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elif op == 'remove':
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c.set_key(k)
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c.remove()
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if k in current:
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del current[k]
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elif op == 'stop':
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# For both, the key given is the start key. Add 2
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# for the stop key.
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c.set_key(k)
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kstart = 1
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kstop = k
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self.session.truncate(None, None, c, None)
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while (kstart <= kstop):
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del current[kstart]
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kstart += 1
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# print current
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# Check the state after each operation.
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self.check_all(current, committed)
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if txn == 'commit':
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committed = current.copy()
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self.session.commit_transaction()
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elif txn == 'rollback':
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current = committed.copy()
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self.session.rollback_transaction()
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# Check the state after each commit/rollback.
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self.check_all(current, committed)
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# Backup the target we modified. We expect that running
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# recovery now will generate an exception if we committed.
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# print 'Call hot_backup with ' + self.uri
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self.hot_backup(self.uri, committed)
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if txn == 'commit':
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self.assertEqual(True, self.exception == 'true')
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else:
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self.assertEqual(True, self.exception == 'false')
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if __name__ == '__main__':
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wttest.run()
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