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From "Vinod Kumar Vavilapalli (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3641) CapacityScheduler should be more conservative assigning off-switch requests
Date Mon, 16 Jan 2012 19:11:41 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13187096#comment-13187096
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Vinod Kumar Vavilapalli commented on MAPREDUCE-3641:
----------------------------------------------------

Looking through the patch.
                
> CapacityScheduler should be more conservative assigning off-switch requests
> ---------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3641
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3641
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2, scheduler
>    Affects Versions: 0.23.0
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>            Priority: Blocker
>         Attachments: MAPREDUCE-3641.patch, MAPREDUCE-3641.patch, MAPREDUCE-3641.patch,
MAPREDUCE-3641.patch
>
>
> In hadoop-1, the CS is very conservative handing out off-switch assignments, we need
to do the same in YARN.
> We noticed performance regressions due to this, particularly for reduces.

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