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From "Arun C Murthy (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3641) CapacityScheduler should be more conservative assigning off-switch requests
Date Sun, 15 Jan 2012 03:34:45 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy updated MAPREDUCE-3641:
-------------------------------------

    Status: Patch Available  (was: Open)

Writing unit tests now...
                
> 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
>
>
> 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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