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Type:
Sub-task
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Status: Closed
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Priority:
Blocker
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Resolution: Fixed
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Affects Version/s: 0.23.0
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Fix Version/s: 0.23.1
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Labels:None
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Target Version/s:
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Hadoop Flags:Reviewed
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Release Note:Making CapacityScheduler more conservative so as to assign only one off-switch container in a single scheduling iteration.
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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MAPREDUCE-3525 Shuffle benchmark is nearly 1.5x slower in 0.23
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- Closed
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MAPREDUCE-3534 Compression benchmark run-time increased by 13% in 0.23
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- Closed
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