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From "Mariappan Asokan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4808) Refactor MapOutput and MergeManager to facilitate reuse by Shuffle implementations
Date Thu, 17 Jan 2013 23:38:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556749#comment-13556749
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Mariappan Asokan commented on MAPREDUCE-4808:
---------------------------------------------

Hi Chris,
  Thanks for your quick feedback.  I looked at the patch.  It has one minor nit.  The {{createMergeManager}}
method should take {{ShuffleConsumerPlugin.Context}} object. I will go over it one more time,
work out the change, run tests, and post the patch shortly.

Thanks.

-- Asokan

                
> Refactor MapOutput and MergeManager to facilitate reuse by Shuffle implementations
> ----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4808
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4808
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>            Reporter: Arun C Murthy
>            Assignee: Mariappan Asokan
>         Attachments: COMBO-mapreduce-4809-4812-4808.patch, mapreduce-4808.patch, mapreduce-4808.patch,
mapreduce-4808.patch, mapreduce-4808.patch, mapreduce-4808.patch, mapreduce-4808.patch, mapreduce-4808.patch,
MergeManagerPlugin.pdf, MR-4808.patch
>
>
> Now that Shuffle is pluggable (MAPREDUCE-4049), it would be convenient for alternate
implementations to be able to reuse portions of the default implementation. 
> This would come with the strong caveat that these classes are LimitedPrivate and Unstable.

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