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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (YARN-80) Support delay scheduling for node locality in MR2's capacity scheduler
Date Mon, 03 Sep 2012 09:56:07 GMT

     [ https://issues.apache.org/jira/browse/YARN-80?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy reassigned YARN-80:
---------------------------------

    Assignee: Arun C Murthy
    
> 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
>
> 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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