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/*-
* Public Domain 2014-2018 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.
*
* ex_sync.c
* demonstrates how to use the transaction sync configuration.
*/
#include <test_util.h>
static const char *home;
static const char *const uri = "table:test";
#define CONN_CONFIG "create,cache_size=100MB,log=(archive=false,enabled=true)"
#define MAX_KEYS 100
int
main(int argc, char *argv[])
{
WT_CONNECTION *wt_conn;
WT_CURSOR *cursor;
WT_SESSION *session;
int i, record_count, ret;
char k[32], v[32];
const char *conf;
home = example_setup(argc, argv);
error_check(wiredtiger_open(home, NULL, CONN_CONFIG, &wt_conn));
error_check(wt_conn->open_session(wt_conn, NULL, NULL, &session));
error_check(session->create(
session, uri, "key_format=S,value_format=S"));
error_check(session->open_cursor(session, uri, NULL, NULL, &cursor));
/*
* Perform some operations with individual auto-commit transactions.
*/
error_check(session->begin_transaction(session, NULL));
for (record_count = 0, i = 0; i < MAX_KEYS; i++, record_count++) {
if (i == MAX_KEYS/2) {
error_check(session->commit_transaction(
session, "sync=background"));
ret = session->transaction_sync(
session, "timeout_ms=0");
if (ret == ETIMEDOUT)
printf("Transactions not yet stable\n");
else if (ret != 0) {
fprintf(stderr,
"session.transaction_sync: error %s\n",
session->strerror(session, ret));
exit (1);
}
error_check(session->begin_transaction(session, NULL));
} else {
if ((record_count % 3) == 0)
conf = "sync=background";
else
conf = "sync=off";
error_check(session->commit_transaction(session, conf));
error_check(session->begin_transaction(session, NULL));
}
(void)snprintf(k, sizeof(k), "key%d", i);
(void)snprintf(v, sizeof(v), "value%d", i);
cursor->set_key(cursor, k);
cursor->set_value(cursor, v);
error_check(cursor->insert(cursor));
}
error_check(session->commit_transaction(session, "sync=background"));
printf("Wait forever until stable\n");
error_check(session->transaction_sync(session, NULL));
printf("Transactions now stable\n");
error_check(session->begin_transaction(session, NULL));
/*
* Perform some operations within a single transaction.
*/
for (i = MAX_KEYS; i < MAX_KEYS+5; i++, record_count++) {
(void)snprintf(k, sizeof(k), "key%d", i);
(void)snprintf(v, sizeof(v), "value%d", i);
cursor->set_key(cursor, k);
cursor->set_value(cursor, v);
error_check(cursor->insert(cursor));
}
error_check(session->commit_transaction(session, "sync=on"));
error_check(session->transaction_sync(session, "timeout_ms=0"));
/*
* Demonstrate using log_flush to force the log to disk.
*/
for (i = 0; i < MAX_KEYS; i++, record_count++) {
(void)snprintf(k, sizeof(k), "key%d", record_count);
(void)snprintf(v, sizeof(v), "value%d", record_count);
cursor->set_key(cursor, k);
cursor->set_value(cursor, v);
error_check(cursor->insert(cursor));
}
error_check(session->log_flush(session, "sync=on"));
for (i = 0; i < MAX_KEYS; i++, record_count++) {
(void)snprintf(k, sizeof(k), "key%d", record_count);
(void)snprintf(v, sizeof(v), "value%d", record_count);
cursor->set_key(cursor, k);
cursor->set_value(cursor, v);
error_check(cursor->insert(cursor));
}
error_check(cursor->close(cursor));
error_check(session->log_flush(session, "sync=off"));
error_check(session->log_flush(session, "sync=on"));
error_check(wt_conn->close(wt_conn, NULL));
return (EXIT_SUCCESS);
}
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