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Update 基于Zookeeper搭建Hadoop高可用集群.md

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notes/installation/基于Zookeeper搭建Hadoop高可用集群.md
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@ -70,7 +70,7 @@ YARN ResourceManager 的高可用与 HDFS NameNode 的高可用类似，但是 R
## 二、集群规划
按照高可用的设计目标：需要保证至少有两个 NameNode (一主一备) 和 两个 ResourceManager (一主一备) ，同时为满足“半写入则成功”的原则，需要至少要有3个 JournalNode 节点。这里使用三台主机进行搭建，集群规划如下：
按照高可用的设计目标：需要保证至少有两个 NameNode (一主一备) 和 两个 ResourceManager (一主一备) ，同时为满足“过半写入则成功”的原则，需要至少要有3个 JournalNode 节点。这里使用三台主机进行搭建，集群规划如下：
<div align="center"> <img src="https://github.com/heibaiying/BigData-Notes/blob/master/pictures/hadoop高可用集群规划.png"/> </div>