2021-10-14 redis-cluster处理failover

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已于 2022-11-22 16:49:51 修改

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分类专栏： redis 文章标签： redis 数据库

于 2021-10-14 11:34:36 首次发布

本文链接：https://blog.youkuaiyun.com/adofsauron/article/details/120760726

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本文深入探讨了Redis Cluster中Slave在完成故障转移（failover）时的详细步骤和复杂性，旨在揭示Redis集群高可用性的实现机制。

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摘要:

redis的cluster集群, slave在完成failover时相对复杂, 本文记录下failover的细节

脑图:

代码:


/* This function is called if we are a slave node and our master serving
 * a non-zero amount of hash slots is in FAIL state.
 *
 * The gaol of this function is:
 * 1) To check if we are able to perform a failover, is our data updated?
 * 2) Try to get elected by masters.
 * 3) Perform the failover informing all the other nodes.
 */
void clusterHandleSlaveFailover(void) {
    mstime_t data_age;
    mstime_t auth_age = mstime() - server.cluster->failover_auth_time;
    int needed_quorum &#