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Add fsync to readSyncBulkPayload(). (#7839)

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We should sync temp DB file before renaming as rdb_fsync_range does not use
flag `SYNC_FILE_RANGE_WAIT_AFTER`.

Refer to `Linux Programmer's Manual`:
SYNC_FILE_RANGE_WAIT_AFTER
    Wait upon write-out of all pages in the range after performing any write.

(cherry picked from commit 0d62caab21)
This commit is contained in:
WuYunlong 2020-09-25 13:08:06 +08:00 committed by Oran Agra
parent faa431c98d
commit bb7e00b699
1 changed files with 11 additions and 0 deletions
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11
src/replication.c
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@ -1752,6 +1752,17 @@ void readSyncBulkPayload(connection *conn) {
killRDBChild();
}
/* Make sure the new file (also used for persistence) is fully synced
* (not covered by earlier calls to rdb_fsync_range). */
if (fsync(server.repl_transfer_fd) == -1) {
serverLog(LL_WARNING,
"Failed trying to sync the temp DB to disk in "
"MASTER <-> REPLICA synchronization: %s",
strerror(errno));
cancelReplicationHandshake();
return;
}
/* Rename rdb like renaming rewrite aof asynchronously. */
int old_rdb_fd = open(server.rdb_filename,O_RDONLY|O_NONBLOCK);
if (rename(server.repl_transfer_tmpfile,server.rdb_filename) == -1) {