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https://issues.apache.org/jira/browse/YARN-80?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy updated YARN-80:
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Attachment: YARN-80.patch
Trivial patch, needs more in future... for now, setting the config should work
in most cases. Need to add tests yet, too late tonight! :)
> Support delay scheduling for node locality in MR2's capacity scheduler
> ----------------------------------------------------------------------
>
> Key: YARN-80
> URL: https://issues.apache.org/jira/browse/YARN-80
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: capacityscheduler
> Reporter: Todd Lipcon
> Assignee: Arun C Murthy
> Attachments: YARN-80.patch
>
>
> 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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