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https://issues.apache.org/jira/browse/MAPREDUCE-7312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18043423#comment-18043423
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ASF GitHub Bot commented on MAPREDUCE-7312:
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github-actions[bot] closed pull request #2547: MAPREDUCE-7312. Add cache switch
of MapReduce History Server
URL: https://github.com/apache/hadoop/pull/2547
> Add cache switch of MapReduce History Server
> --------------------------------------------
>
> Key: MAPREDUCE-7312
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7312
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Deegue
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> History Server scans `done` directory while initializing. If there are
> millions of application files to cache, it will become a time demanding
> action.
> In our cluster, it'll be 4+ hours before the initialization is done.
> We added a switch to control whether doing initialized cache or not.
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