sentinel master
时间: 2023-08-19 14:06:26 浏览: 44
Sentinel master是指Sentinel监控的主节点。在Redis中,Sentinel是一种用于监控和管理Redis主从复制和高可用性的工具。Sentinel会定期向主节点发送PING命令,如果主节点在一定时间内没有回复,则Sentinel会将主节点标记为主观下线。当足够数量的Sentinel确认主节点进入主观下线状态后,主节点会被标记为客观下线。此时,Sentinel会执行故障转移操作,将一个从节点升级为新的主节点,并将其他从节点指向新的主节点。Sentinel还会定期向主节点和从节点发送INFO命令,以获取节点的信息。当主节点重新回复PING命令时,主观下线状态会被移除。\[1\]\[3\]
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