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https://issues.apache.org/jira/browse/MAPREDUCE-3641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated MAPREDUCE-3641:
-----------------------------------------------
Resolution: Fixed
Fix Version/s: 0.23.1
Release Note: Making CapacityScheduler more conservative so as to assign
only one off-switch container in a single scheduling iteration.
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
I just committed this to trunk and branch-023. Thanks Arun!
> 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
> Fix For: 0.23.1
>
> 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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