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https://issues.apache.org/jira/browse/MAPREDUCE-463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083946#comment-13083946
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yuling commented on MAPREDUCE-463:
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_temporary is create at clearnup phase,and used at some OutputFormat, when
mapred.committer.job.setup.cleanup.needed is set to false, we will have to
create _temporary before we use it.
> The job setup and cleanup tasks should be optional
> --------------------------------------------------
>
> Key: MAPREDUCE-463
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-463
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: Owen O'Malley
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.21.0
>
> Attachments: patch-463-1.txt, patch-463.txt, patch-5785-1.txt,
> patch-5785-2.txt, patch-5785-3.txt, patch-5785-4.txt, patch-5785-5.txt,
> patch-5785.txt
>
>
> For jobs that require low latency and do not require setup or cleanup tasks
> for the job, it should be possible to turn them off for that job.
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