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
|
#!/usr/bin/env python
#
# Public Domain 2014-2020 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.
import wiredtiger, wttest
def timestamp_str(t):
return '%x' % t
# test_timestamp20.py
# Exercise fixing up of out-of-order updates in the history store.
class test_timestamp20(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB'
session_config = 'isolation=snapshot'
def test_timestamp20(self):
uri = 'table:test_timestamp20'
self.session.create(uri, 'key_format=S,value_format=S')
self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(1))
cursor = self.session.open_cursor(uri)
value1 = 'a' * 500
value2 = 'b' * 500
value3 = 'c' * 500
value4 = 'd' * 500
value5 = 'e' * 500
for i in range(1, 10000):
self.session.begin_transaction()
cursor[str(i)] = value1
self.session.commit_transaction('commit_timestamp=' + timestamp_str(10))
for i in range(1, 10000):
self.session.begin_transaction()
cursor[str(i)] = value2
self.session.commit_transaction('commit_timestamp=' + timestamp_str(20))
for i in range(1, 10000):
self.session.begin_transaction()
cursor[str(i)] = value3
self.session.commit_transaction('commit_timestamp=' + timestamp_str(30))
old_reader_session = self.conn.open_session()
old_reader_cursor = old_reader_session.open_cursor(uri)
old_reader_session.begin_transaction('read_timestamp=' + timestamp_str(30))
# Now put two updates out of order. 5 will go to the history store and will trigger a
# correction to the existing contents.
for i in range(1, 10000):
self.session.begin_transaction()
cursor[str(i)] = value4
self.session.commit_transaction('commit_timestamp=' + timestamp_str(5))
self.session.begin_transaction()
cursor[str(i)] = value5
self.session.commit_transaction('commit_timestamp=' + timestamp_str(40))
self.session.begin_transaction('read_timestamp=' + timestamp_str(30))
for i in range(1, 10000):
self.assertEqual(cursor[str(i)], value4)
self.session.rollback_transaction()
for i in range(1, 10000):
self.assertEqual(old_reader_cursor[str(i)], value3)
old_reader_session.rollback_transaction()
|
