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https://issues.apache.org/jira/browse/MAPREDUCE-7312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated MAPREDUCE-7312:
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    Labels: pull-request-available  (was: )

> 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: 10m
>  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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