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PSYNC2: make persisiting replication info more solid

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This commit is a reinforcement of commit c1c99e9.

1. Replication information can be stored when the RDB file is
generated by a mater using server.slaveseldb when server.repl_backlog
is not NULL, or set repl_stream_db be -1. That's safe, because
NULL server.repl_backlog will trigger full synchronization,
then master will send SELECT command to replicaiton stream.
2. Only do rdbSave* when rsiptr is not NULL,
if we do rdbSave* without rdbSaveInfo, slave will miss repl-stream-db.
3. Save the replication informations also in the case of
SAVE command, FLUSHALL command and DEBUG reload.
This commit is contained in:
zhaozhao.zz
2017-09-20 13:47:42 +08:00
committed by antirez
parent c1c99e9f4e
commit b541ccef25
4 changed files with 33 additions and 9 deletions
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4
src/debug.c
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@ -335,7 +335,9 @@ void debugCommand(client *c) {
if (c->argc >= 3) c->argv[2] = tryObjectEncoding(c->argv[2]);
serverAssertWithInfo(c,c->argv[0],1 == 2);
} else if (!strcasecmp(c->argv[1]->ptr,"reload")) {
if (rdbSave(server.rdb_filename,NULL) != C_OK) {
rdbSaveInfo rsi, *rsiptr;
rsiptr = rdbPopulateSaveInfo(&rsi);
if (rdbSave(server.rdb_filename,rsiptr) != C_OK) {
addReply(c,shared.err);
return;
}