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
|
#!/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.
from test_gc01 import test_gc_base
from wiredtiger import stat
from wtdataset import SimpleDataSet
# test_gc02.py
# Test that checkpoint cleans the obsolete history store internal pages.
class test_gc02(test_gc_base):
conn_config = 'cache_size=1GB,statistics=(all)'
def test_gc(self):
nrows = 100000
# Create a table without logging.
uri = "table:gc02"
ds = SimpleDataSet(self, uri, 0, key_format="i", value_format="S")
ds.populate()
# Pin oldest and stable to timestamp 1.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(1) +
',stable_timestamp=' + self.timestamp_str(1))
bigvalue = "aaaaa" * 100
bigvalue2 = "ddddd" * 100
self.large_updates(uri, bigvalue, ds, nrows, 10)
# Check that all updates are seen.
self.check(bigvalue, uri, nrows, 10)
self.large_updates(uri, bigvalue2, ds, nrows, 100)
# Check that the new updates are only seen after the update timestamp.
self.check(bigvalue2, uri, nrows, 100)
# Check that old updates are seen.
self.check(bigvalue, uri, nrows, 10)
# Checkpoint to ensure that the history store is checkpointed and not cleaned.
self.session.checkpoint()
c = self.session.open_cursor('statistics:')
self.assertEqual(c[stat.conn.cc_pages_evict][2], 0)
self.assertEqual(c[stat.conn.cc_pages_removed][2], 0)
self.assertGreater(c[stat.conn.cc_pages_visited][2], 0)
c.close()
# Pin oldest and stable to timestamp 100.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(100) +
',stable_timestamp=' + self.timestamp_str(100))
# Check that the new updates are only seen after the update timestamp.
self.check(bigvalue2, uri, nrows, 100)
# Load a slight modification with a later timestamp.
self.large_modifies(uri, 'A', ds, 10, 1, nrows, 110)
self.large_modifies(uri, 'B', ds, 20, 1, nrows, 120)
self.large_modifies(uri, 'C', ds, 30, 1, nrows, 130)
# Set of update operations with increased timestamp.
self.large_updates(uri, bigvalue, ds, nrows, 150)
# Set of update operations with increased timestamp.
self.large_updates(uri, bigvalue2, ds, nrows, 180)
# Set of update operations with increased timestamp.
self.large_updates(uri, bigvalue, ds, nrows, 200)
# Check that the modifies are seen.
bigvalue_modA = bigvalue2[0:10] + 'A' + bigvalue2[11:]
bigvalue_modB = bigvalue_modA[0:20] + 'B' + bigvalue_modA[21:]
bigvalue_modC = bigvalue_modB[0:30] + 'C' + bigvalue_modB[31:]
self.check(bigvalue_modA, uri, nrows, 110)
self.check(bigvalue_modB, uri, nrows, 120)
self.check(bigvalue_modC, uri, nrows, 130)
# Check that the new updates are only seen after the update timestamp.
self.check(bigvalue, uri, nrows, 150)
# Check that the new updates are only seen after the update timestamp.
self.check(bigvalue2, uri, nrows, 180)
# Check that the new updates are only seen after the update timestamp.
self.check(bigvalue, uri, nrows, 200)
# Pin oldest and stable to timestamp 200.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(200) +
',stable_timestamp=' + self.timestamp_str(200))
# Checkpoint to ensure that the history store is cleaned.
self.session.checkpoint()
self.check_gc_stats()
# Check that the new updates are only seen after the update timestamp.
self.check(bigvalue, uri, nrows, 200)
if __name__ == '__main__':
wttest.run()
|
