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https://issues.apache.org/jira/browse/MAPREDUCE-3191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13971850#comment-13971850
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Chen He commented on MAPREDUCE-3191:
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Hi [~phatak.dev]
Feel free to take it at any time. 

> docs for map output compression incorrectly reference SequenceFile
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3191
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3191
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Chen He
>            Priority: Trivial
>              Labels: documentation, noob
>             Fix For: 3.0.0, 0.23.11, 2.5.0, 2.4.1
>
>         Attachments: MAPREDUCE-3191-v2.patch, MAPREDUCE-3191.patch
>
>
> The documentation currently says that map output compression uses 
> SequenceFile compression. This hasn't been true in several years, since we 
> use IFile for intermediate data now.



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