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
|
/*-
* Public Domain 2008-2013 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.
*/
#include "format.h"
/*
* check_copy --
* Confirm the hot backup worked.
*/
static void
check_copy(void)
{
WT_CONNECTION *conn;
WT_SESSION *session;
int ret;
wts_open(RUNDIR_BACKUP, 0, &conn);
/*
* Open a session and verify the store; some data-sources don't support
* verify.
*
* XXX
* LSM can deadlock if WT_SESSION methods are called at the wrong time,
* don't do that for now.
*/
if (!DATASOURCE("lsm") && !DATASOURCE("memrata")) {
if ((ret = conn->open_session(
conn, NULL, NULL, &session)) != 0)
die(ret, "connection.open_session");
if ((ret = session->verify(session, g.uri, NULL)) != 0)
die(ret, "session.verify: %s", g.uri);
}
if ((ret = conn->close(conn, NULL)) != 0)
die(ret, "connection.close: %s", RUNDIR_BACKUP);
}
/*
* hot_copy --
* Copy a single file into the hot backup directory.
*/
static void
hot_copy(const char *name)
{
char buf[1024];
(void)snprintf(
buf, sizeof(buf), "cp RUNDIR/%s RUNDIR/BACKUP/%s", name, name);
if (system(buf) != 0)
die(errno, "hot backup copy: %s", buf);
}
/*
* hot_backup --
* Periodically do a hot backup and verify it.
*/
void *
hot_backup(void *arg)
{
WT_CONNECTION *conn;
WT_CURSOR *backup_cursor;
WT_SESSION *session;
u_int period;
int ret;
const char *key;
(void)arg;
/* If hot backups aren't configured, we're done. */
if (!g.c_hot_backups)
return (NULL);
/* Hot backups aren't supported for non-standard data sources. */
if (DATASOURCE("kvsbdb") || DATASOURCE("memrata"))
return (NULL);
conn = g.wts_conn;
/* Open a session. */
if ((ret = conn->open_session(
conn, NULL, NULL, &session)) != 0)
die(ret, "connection.open_session");
/*
* Perform a hot backup at somewhere under 10 seconds (so we get at
* least one done), and then at 45 second intervals.
*/
for (period = MMRAND(1, 10); !g.threads_finished; period = 45) {
/* Sleep for a short period so we don't make the run wait. */
if (period > 0) {
--period;
sleep(1);
if (g.threads_finished)
break;
}
/* Lock out named checkpoints */
if ((ret = pthread_rwlock_wrlock(&g.backup_lock)) != 0)
die(ret, "pthread_rwlock_wrlock: hot-backup lock");
/* Re-create the backup directory. */
(void)system("cd RUNDIR && rm -rf BACKUP");
if (mkdir(RUNDIR_BACKUP, 0777) != 0)
die(errno, "mkdir: %s", RUNDIR_BACKUP);
if ((ret = session->open_cursor(session,
"backup:", NULL, NULL, &backup_cursor)) != 0)
die(ret, "session.open_cursor: backup");
while ((ret = backup_cursor->next(backup_cursor)) == 0) {
if ((ret =
backup_cursor->get_key(backup_cursor, &key)) != 0)
die(ret, "cursor.get_key");
hot_copy(key);
}
if ((ret = backup_cursor->close(backup_cursor)) != 0)
die(ret, "cursor.close");
if ((ret = pthread_rwlock_unlock(&g.backup_lock)) != 0)
die(ret, "pthread_rwlock_unlock: hot-backup lock");
check_copy();
}
if ((ret = session->close(session, NULL)) != 0)
die(ret, "session.close");
return (NULL);
}
|
