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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2394) FairScheduler: Configure fairSharePreemptionThreshold per queue
Date Sat, 30 Aug 2014 20:21:53 GMT

    [ https://issues.apache.org/jira/browse/YARN-2394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14116549#comment-14116549
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Karthik Kambatla commented on YARN-2394:
----------------------------------------

Just noticed that there is duplication between FSQueue#updatePreemptionParameters and QueueManager#setPreemptionParameters?
Can we get rid of one? 

Other than that, I see a couple of lines over 80 chars in AllocationFileLoaderService. 

> FairScheduler: Configure fairSharePreemptionThreshold per queue
> ---------------------------------------------------------------
>
>                 Key: YARN-2394
>                 URL: https://issues.apache.org/jira/browse/YARN-2394
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: fairscheduler
>            Reporter: Ashwin Shankar
>            Assignee: Wei Yan
>         Attachments: YARN-2394-1.patch, YARN-2394-2.patch, YARN-2394-3.patch
>
>
> Preemption based on fair share starvation happens when usage of a queue is less than
50% of its fair share. This 50% is hardcoded. We'd like to make this configurable on a per
queue basis, so that we can choose the threshold at which we want to preempt. Calling this
config "fairSharePreemptionThreshold". 



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