zookeeper 清理snapshot及事务日志

<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:"PingFang SC","Microsoft YaHei",SimHei,Arial,SimSun; font-size:16px; color:rgb(44,44,44)"> 在使用zookeeper过程中，我们知道，会有dataDir和dataLogDir两个目录，分别用于snapshot和事务日志的输出（默认情况下只有dataDir目录，snapshot和事务日志都保存在这个目录中，关于这两个目录的详细说明，请看《<a href="http://nileader.blog.51cto.com/1381108/795265" rel="noopener noreferrer" style="background:transparent; color:rgb(44,98,141); text-decoration:none; margin:0px; padding:0px; outline:none" target="_blank">ZooKeeper管理员指南</a>》）。</p>
<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:"PingFang SC","Microsoft YaHei",SimHei,Arial,SimSun; font-size:16px; color:rgb(44,44,44)">    </p>
<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:"PingFang SC","Microsoft YaHei",SimHei,Arial,SimSun; font-size:16px; color:rgb(44,44,44)"> <span style="">第一种</span>，也是运维人员最常用的，写一个删除日志脚本，每天定时执行即可：</p>
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      <code style="font-family:Monaco,Menlo,Consolas,"Courier New",monospace; font-size:14.4px; padding:2px 4px; color:gray!important; white-space:nowrap; background:none!important">#!/bin/bash</code>
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      <code style="font-family:Monaco,Menlo,Consolas,"Courier New",monospace; font-size:14.4px; padding:2px 4px; color:rgb(0,130,0)!important; white-space:nowrap; background:none!important">#snapshot file dir</code>
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      <code style="font-family:Monaco,Menlo,Consolas,"Courier New",monospace; font-size:14.4px; padding:2px 4px; color:rgb(199,37,78); white-space:nowrap; background:none!important">dataDir=/user/upload/zookeeper/version-2</code>
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      <code style="font-family:Monaco,Menlo,Consolas,"Courier New",monospace; font-size:14.4px; padding:2px 4px; color:rgb(199,37,78); white-space:nowrap; background:none!important">dataLogDir=</code>
      <span style="margin:0px; padding:0px; font-family:monospace; color:rgb(44,44,44); background-color:initial">/user/upload/zookeeper/version-2</span>
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      <code style="font-family:Monaco,Menlo,Consolas,"Courier New",monospace; font-size:14.4px; padding:2px 4px; color:rgb(199,37,78); white-space:nowrap; background:none!important">logDir=/home/nileader/taokeeper/logs</code>
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