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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