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/*-
* 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.
*/
#include "format.h"
/*
* wts_checkpoints --
* Configure WiredTiger library checkpoints.
*/
void
wts_checkpoints(void)
{
char config[128];
/*
* Configuring WiredTiger library checkpoints is done separately, rather than as part of the
* original database open because format tests small caches and you can get into cache stuck
* trouble during the initial load (where bulk load isn't configured). There's a single thread
* doing lots of inserts and creating huge leaf pages. Those pages can't be evicted if there's a
* checkpoint running in the tree, and the cache can get stuck. That workload is unlikely enough
* we're not going to fix it in the library, so configure it away by delaying checkpoint start.
*/
if (g.checkpoint_config != CHECKPOINT_WIREDTIGER)
return;
testutil_check(
__wt_snprintf(config, sizeof(config), ",checkpoint=(wait=%" PRIu32 ",log_size=%" PRIu32 ")",
GV(CHECKPOINT_WAIT), MEGABYTE(GV(CHECKPOINT_LOG_SIZE))));
testutil_check(g.wts_conn->reconfigure(g.wts_conn, config));
}
/*
* checkpoint --
* Periodically take a checkpoint in a format thread.
*/
WT_THREAD_RET
checkpoint(void *arg)
{
WT_CONNECTION *conn;
WT_DECL_RET;
WT_SESSION *session;
u_int secs;
char config_buf[64];
const char *ckpt_config;
bool backup_locked, named_checkpoints;
(void)arg;
conn = g.wts_conn;
testutil_check(conn->open_session(conn, NULL, NULL, &session));
named_checkpoints = !g.lsm_config;
for (secs = mmrand(NULL, 1, 10); !g.workers_finished;) {
if (secs > 0) {
__wt_sleep(1, 0);
--secs;
continue;
}
/*
* LSM and data-sources don't support named checkpoints. Also, don't attempt named
* checkpoints during a hot backup. It's OK to create named checkpoints during a hot backup,
* but we can't delete them, so repeating an already existing named checkpoint will fail
* when we can't drop the previous one.
*/
ckpt_config = NULL;
backup_locked = false;
if (named_checkpoints)
switch (mmrand(NULL, 1, 20)) {
case 1:
/*
* 5% create a named snapshot. Rotate between a
* few names to test multiple named snapshots in
* the system.
*/
ret = lock_try_writelock(session, &g.backup_lock);
if (ret == 0) {
backup_locked = true;
testutil_check(__wt_snprintf(
config_buf, sizeof(config_buf), "name=mine.%" PRIu32, mmrand(NULL, 1, 4)));
ckpt_config = config_buf;
} else if (ret != EBUSY)
testutil_check(ret);
break;
case 2:
/*
* 5% drop all named snapshots.
*/
ret = lock_try_writelock(session, &g.backup_lock);
if (ret == 0) {
backup_locked = true;
ckpt_config = "drop=(all)";
} else if (ret != EBUSY)
testutil_check(ret);
break;
}
testutil_check(session->checkpoint(session, ckpt_config));
if (backup_locked)
lock_writeunlock(session, &g.backup_lock);
secs = mmrand(NULL, 5, 40);
}
testutil_check(session->close(session, NULL));
return (WT_THREAD_RET_VALUE);
}
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