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Posted to mapreduce-dev@hadoop.apache.org by "Arun C Murthy (Created) (JIRA)" <ji...@apache.org> on 2012/01/08 07:14:39 UTC
[jira] [Created] (MAPREDUCE-3641) CapacityScheduler should be more
conservative assigning off-switch requests
CapacityScheduler should be more conservative assigning off-switch requests
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Key: MAPREDUCE-3641
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3641
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2, scheduler
Affects Versions: 0.23.0
Reporter: Arun C Murthy
Assignee: Arun C Murthy
Priority: Blocker
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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