Hadoop-0.20.2的log存放时间控制

本文详细介绍了如何通过调整Hadoop配置文件,优化JobTracker的WebUI显示多个job执行状态并延长其存放时间,以及延长Tasklog在HistoryUI上的存放时间,以提升整体性能。

1. 想要在JobTracker的WebUI上(master:50030)多保持几个job执行状态,默认是100个

调整Hadoop配置文件,比如调整为200个

<property>

<name>mapred.jobtracker.completeuserjobs.maximum</name>

<value>200</value>

        </property>

 

 2. 想要在JobTracker的WebUI上延长job执行状态的存放时间,默认是24小时,现在调整为72小时,也就是259200000微秒

<property>

<name>mapred.jobtracker.retirejob.interval</name>

<value>259200000</value>

</property>

 

 3. 想要在JobTracker的HistoryUI上延长Task log(Last 4KB,Last 8KB, ALL)的存放时间,默认是24小时,这个参数是MapReduce job控制的,要么在Hadoop的mapred-site.xml中设置该值为final或者在每个MapReduce job中设置为72

<property>

<name>mapred.userlog.retain.hours</name>

<value>72</value>

</property>



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最新发布
09-28
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