1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
#!/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_txn04.py
# Transactions: hot backup and recovery
#
import shutil, os
from suite_subprocess import suite_subprocess
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 = 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)
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())
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 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}
for k in current:
c[k] = 1
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)
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[k] = i + 2
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 and verify the data.
# print 'Call hot_backup with ' + self.uri
self.hot_backup(self.uri, committed)
def test_ops(self):
with self.expectedStdoutPattern('recreating metadata'):
self.ops()
if __name__ == '__main__':
wttest.run()
|
