Redis 復制源碼：

Simple Dynamic String

使用復制功能，需要設置主備結點，下面的是設置Master結點的代碼。

需要指定Master結點的IP地址與Port端口號。

這裏

/* Set replication to the specified master address and port. */
void replicationSetMaster(char *ip, int port) {
    sdsfree(server.masterhost);
    server.masterhost = sdsnew(ip);
    server.masterport 
 
= port;
    if (server.master) freeClient(server.master);
    disconnectAllBlockedClients(); /* Clients blocked in master, now slave. */
    disconnectSlaves(); /* Force our slaves to resync with us as well. */
    replicationDiscardCachedMaster(); /* Don‘t try a PSYNC. */
    freeReplicationBacklog(); 
 
/* Don‘t allow our chained slaves to PSYNC. */
    cancelReplicationHandshake();
    server.repl_state = REPL_STATE_CONNECT;
    server.master_repl_offset = 0;
    server.repl_down_since = 0;
}

Redis 源碼分析 - 復制