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实现MySQL，MHA高可用集群架构-李亮的博客
source link: http://blog.51cto.com/13598893/2093432
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MHA：MasterHA，对主节点进行监控，可实现自动故障转移至其它从节点；通过提升某一从节点为新的主节点，基于主从复制实现，还需要客户端配合实现，目前MHA主要支持一主多从的架构，要搭建MHA,要求一个复制集群中必须最少有三台数据库服务器，一主二从，即一台充当master，一台充当备用master，另外一台充当从库，如果财大气粗，也可以用一台专门的服务器来当MHA监控管理服务器MHA工作原理1从
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