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Posted to yarn-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2015/08/08 22:59:46 UTC

[jira] [Commented] (YARN-2154) FairScheduler: Improve preemption to preempt only those containers that would satisfy the incoming request

    [ https://issues.apache.org/jira/browse/YARN-2154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14663177#comment-14663177 ] 

Karthik Kambatla commented on YARN-2154:
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Thanks for posting the approach here, Arun. 

Observation: We are prioritizing marked resources over unmarked resources. If a queue has some large jobs that have already started and a small job waiting for resources for its AM to start, we prioritize large jobs. Is this okay? I feel it might be.

> FairScheduler: Improve preemption to preempt only those containers that would satisfy the incoming request
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-2154
>                 URL: https://issues.apache.org/jira/browse/YARN-2154
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>    Affects Versions: 2.4.0
>            Reporter: Karthik Kambatla
>            Assignee: Arun Suresh
>            Priority: Critical
>         Attachments: YARN-2154.1.patch
>
>
> Today, FairScheduler uses a spray-gun approach to preemption. Instead, it should only preempt resources that would satisfy the incoming request. 



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