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Posted to mapreduce-dev@hadoop.apache.org by "Todd Lipcon (Created) (JIRA)" <ji...@apache.org> on 2011/10/19 09:17:10 UTC
[jira] [Created] (MAPREDUCE-3210) Support delay scheduling for node
locality in MR2's capacity scheduler
Support delay scheduling for node locality in MR2's capacity scheduler
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Key: MAPREDUCE-3210
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3210
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mrv2
Affects Versions: 0.23.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
The capacity scheduler in MR2 doesn't support delay scheduling for achieving node-level locality. So, jobs exhibit poor data locality even if they have good rack locality. Especially on clusters where disk throughput is much better than network capacity, this hurts overall job performance. We should optionally support node-level delay scheduling heuristics similar to what the fair scheduler implements in MR1.
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