redis sentinel 高可用架构

参考 http://www.javashuo.com/article/p-yvcpjtzi-ea.html http://www.cnblogs.com/xuanzhi201111/p/5249626.htmlhtml Redis的高可用架构有好比keepalived+redis，redis cluster，twemproxy，codis，下面咱们主要针对Redis Sentinel高可用架构展开

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