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https://issues.apache.org/jira/browse/MAPREDUCE-1302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797404#action_12797404
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Zheng Shao commented on MAPREDUCE-1302:
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Scott, I do use the returned value of #getRelativePathName() after comparing it
with null.
So the other option is to have 2 functions: #isInVolume() and
#getRelativePathName().
I prefer having only 1 function just for simplification.
> TrackerDistributedCacheManager can delete file asynchronously
> -------------------------------------------------------------
>
> Key: MAPREDUCE-1302
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1302
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: tasktracker
> Affects Versions: 0.20.2, 0.21.0, 0.22.0
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Attachments: MAPREDUCE-1302.0.patch, MAPREDUCE-1302.1.patch,
> MAPREDUCE-1302.2.patch, MAPREDUCE-1302.3.patch, MAPREDUCE-1302.4.patch
>
>
> With the help of AsyncDiskService from MAPREDUCE-1213, we should be able to
> delete files from distributed cache asynchronously.
> That will help make task initialization faster, because task initialization
> calls the code that localizes files into the cache and may delete some other
> files.
> The deletion can slow down the task initialization speed.
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