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
|
#!/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
import os, shutil
from helper import compare_files
from wtbackup import backup_base
from wtdataset import simple_key
from wtscenario import make_scenarios
# test_backup16.py
# Ensure incremental backup doesn't copy unnecessary files.
class test_backup16(backup_base):
conn_config='cache_size=1G,log=(enabled,file_max=100K)'
counter=1
logmax='100K'
# Define the table name and its on-disk file name together.
file1='test1.wt'
uri1='table:test1'
file2='test2.wt'
uri2='table:test2'
file3='test3.wt'
uri3='table:test3'
file4='test4.wt'
uri4='table:test4'
file5='test5.wt'
uri5='table:test5'
file6='test6.wt'
uri6='table:test6'
pfx = 'test_backup'
# Set the key and value big enough that we modify a few blocks.
bigkey = 'Key' * 10
bigval = 'Value' * 10
mult = 1
counter = 1
nops = 10
def verify_incr_backup(self, expected_file_list):
bkup_config = ('incremental=(src_id="ID' + str(self.counter - 1) +
'",this_id="ID' + str(self.counter) + '")')
bkup_cur = self.session.open_cursor('backup:', None, bkup_config)
self.counter += 1
num_files = 0
# Verify the files included in the incremental backup are the ones we expect.
# Note that all files will be returned. We're only interested in the ones that
# return file information.
while True:
ret = bkup_cur.next()
if ret != 0:
break
bkup_file = bkup_cur.get_key()
if bkup_file.startswith('WiredTiger'):
continue
incr_config = 'incremental=(file=' + bkup_file + ')'
incr_cur = self.session.open_cursor(None, bkup_cur, incr_config)
while True:
ret = incr_cur.next()
# Stop if there is nothing to copy or we're done.
if ret != 0:
break
# Check this file is one we are expecting.
self.assertTrue(bkup_file in expected_file_list)
num_files += 1
# Ensure that the file we changed has content to copy and the file we didn't
# change doesn't have any content to copy. The second value is the number of
# bytes to copy for a range return or the file size on a file copy. Either way
# it should not be zero.
incr_list = incr_cur.get_keys()
self.assertNotEqual(incr_list[1], 0)
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
incr_cur.close()
self.assertEqual(ret, wiredtiger.WT_NOTFOUND)
bkup_cur.close()
# Ensure that the backup saw all the expected files.
self.assertEqual(num_files, len(expected_file_list))
def test_backup16(self):
# Create four tables before the first backup. Add data to two of them.
self.session.create(self.uri1, 'key_format=S,value_format=S')
self.session.create(self.uri2, 'key_format=S,value_format=S')
self.session.create(self.uri3, 'key_format=S,value_format=S')
self.session.create(self.uri6, 'key_format=S,value_format=S')
self.add_data(self.uri1, self.bigkey, self.bigval, True)
self.add_data(self.uri2, self.bigkey, self.bigval, True)
# Checkpoint and simulate full backup.
self.session.checkpoint()
config = 'incremental=(enabled,granularity=1M,this_id="ID0")'
cursor = self.session.open_cursor('backup:', None, config)
cursor.close()
# Create new tables, add more data and checkpoint.
# Add data to an earlier table and one of the new tables. This now gives us:
# 1. An existing table with checkpointed new data and changes to record.
# 2. An existing table with old data and no new changes.
# 3. An existing table with no data at all but gets new data.
# 4. An new table with no data and that will never have new data.
# 5. A new table with checkpointed new data.
# 6. An existing table with no data and that will never have new data.
#
# Note that cases 4 and 6 are different. In the case of table 6, since it existed on
# disk at the time of the initial full backup it will never appear in the list of files
# with any data to copy. In the case of table 4 we will be told to copy the whole file
# every time in order to have the new file appear in the backup.
#
self.session.create(self.uri4, "key_format=S,value_format=S")
self.session.create(self.uri5, "key_format=S,value_format=S")
self.add_data(self.uri1, self.bigkey, self.bigval, True)
self.add_data(self.uri5, self.bigkey, self.bigval, True)
self.session.checkpoint()
# Validate these three files are included in the incremental.
# Both new tables should appear in the incremental and the old table with
# new data.
files_to_backup = [self.file1, self.file4, self.file5]
self.verify_incr_backup(files_to_backup)
# Add more data and checkpoint. Earlier old tables without new data should not
# appear in the list. The table with no data at all continues to appear in the
# list.
self.add_data(self.uri3, self.bigkey, self.bigval, True)
self.add_data(self.uri5, self.bigkey, self.bigval, True)
self.session.checkpoint()
# Validate these three files are included in the incremental.
files_to_backup = [self.file3, self.file4, self.file5]
self.verify_incr_backup(files_to_backup)
# Perform one more incremental without changing anything. We should only
# see one file, the file that does not have any checkpoint information.
files_to_backup = [self.file4]
self.verify_incr_backup(files_to_backup)
if __name__ == '__main__':
wttest.run()
|
