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
|
#!/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_TAGS]
# rollback_to_stable
# [END_TAGS]
from helper import simulate_crash_restart
import wttest
from wtdataset import SimpleDataSet
from wtscenario import make_scenarios
from wiredtiger import stat
# test_checkpoint_snapshot03.py
# This test is to check RTS skips the unnecessary pages when the table has more than the
# checkpoint snapshot.
class test_checkpoint_snapshot03(wttest.WiredTigerTestCase):
# Create a table.
uri = "table:test_checkpoint_snapshot03"
nrows = 500000
format_values = [
('column_fix', dict(key_format='r', value_format='8t')),
('column', dict(key_format='r', value_format='S')),
('row_string', dict(key_format='S', value_format='S')),
]
scenarios = make_scenarios(format_values)
def conn_config(self):
config = 'cache_size=250MB,statistics=(all),statistics_log=(json,on_close,wait=1),log=(enabled=true)'
return config
def large_updates(self, uri, value, ds, nrows):
# Update a large number of records.
session = self.session
cursor = session.open_cursor(uri)
for i in range(1, nrows + 1):
session.begin_transaction()
cursor[ds.key(i)] = value
session.commit_transaction()
cursor.close()
def check(self, check_value, uri, nrows):
# In FLCS the existence of the invisible extra row causes the table to extend
# under it. Until that's fixed, expect (not just allow) this row to exist and
# and demand it reads back as zero and not as check_value. When this behavior
# is fixed (so the end of the table updates transactionally) the special-case
# logic can just be removed.
flcs_tolerance = self.value_format == '8t'
session = self.session
session.begin_transaction()
cursor = session.open_cursor(uri)
count = 0
for k, v in cursor:
if flcs_tolerance and count >= nrows:
self.assertEqual(v, 0)
else:
self.assertEqual(v, check_value)
count += 1
session.commit_transaction()
self.assertEqual(count, nrows + 1 if flcs_tolerance else nrows)
def test_checkpoint_snapshot(self):
ds = SimpleDataSet(self, self.uri, 0, \
key_format=self.key_format, value_format=self.value_format, \
config='log=(enabled=false),leaf_page_max=4k')
ds.populate()
if self.value_format == '8t':
valuea = 97
valueb = 98
valuec = 99
else:
valuea = "aaaaa" * 100
valueb = "bbbbb" * 100
valuec = "ccccc" * 100
session1 = self.conn.open_session()
session1.begin_transaction()
cursor1 = session1.open_cursor(self.uri)
for i in range(self.nrows + 1, self.nrows + 2):
cursor1.set_key(ds.key(i))
cursor1.set_value(valueb)
self.assertEqual(cursor1.insert(), 0)
self.large_updates(self.uri, valuea, ds, self.nrows)
self.check(valuea, self.uri, self.nrows)
self.session.checkpoint()
session1.rollback_transaction()
self.reopen_conn()
# Check the table contains the last checkpointed value.
self.session.breakpoint()
self.check(valuea, self.uri, self.nrows)
session1 = self.conn.open_session()
session1.begin_transaction()
cursor1 = session1.open_cursor(self.uri)
for i in range(self.nrows + 1, self.nrows + 2):
cursor1.set_key(ds.key(i))
cursor1.set_value(valueb)
self.assertEqual(cursor1.insert(), 0)
self.session.begin_transaction()
cursor = self.session.open_cursor(self.uri)
for i in range(1, 2):
cursor.set_key(ds.key(i))
cursor.set_value(valuec)
self.assertEqual(cursor.update(), 0)
self.session.commit_transaction()
self.session.checkpoint()
session1.rollback_transaction()
# Simulate a server crash and restart.
simulate_crash_restart(self, ".", "RESTART")
stat_cursor = self.session.open_cursor('statistics:', None, None)
inconsistent_ckpt = stat_cursor[stat.conn.txn_rts_inconsistent_ckpt][2]
keys_removed = stat_cursor[stat.conn.txn_rts_keys_removed][2]
keys_restored = stat_cursor[stat.conn.txn_rts_keys_restored][2]
pages_skipped = stat_cursor[stat.conn.txn_rts_tree_walk_skip_pages][2]
upd_aborted = stat_cursor[stat.conn.txn_rts_upd_aborted][2]
stat_cursor.close()
self.assertGreater(inconsistent_ckpt, 0)
self.assertEqual(upd_aborted, 0)
self.assertGreaterEqual(keys_removed, 0)
self.assertEqual(keys_restored, 0)
self.assertGreater(pages_skipped, 0)
if __name__ == '__main__':
wttest.run()
|
