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mysql3-初学者
source link: http://blog.51cto.com/mazhenbo/2084359
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MHA（MasterHighAvailability）是目前在MySQL高可用方面相对成熟的一个解决方案，MHA在监控到master节点故障时，会提升其中拥有最新数据的slave节点成为新的master节点，在此期间，MHA会通过于其它从节点获取额外信息来避免一致性方面的问题。MHA还提供了master节点的在线切换功能。MHA服务有两种角色，MHAManager(管理节点)和MHANode(数据
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