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From "Wanqiang Ji (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-9041) Optimize FSPreemptionThread#identifyContainersToPreempt method
Date Thu, 29 Nov 2018 03:46:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-9041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16702681#comment-16702681
] 

Wanqiang Ji commented on YARN-9041:
-----------------------------------

Thanks for [~Steven Rand] review and help.

> Optimize FSPreemptionThread#identifyContainersToPreempt method
> --------------------------------------------------------------
>
>                 Key: YARN-9041
>                 URL: https://issues.apache.org/jira/browse/YARN-9041
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler preemption
>            Reporter: Wanqiang Ji
>            Assignee: Wanqiang Ji
>            Priority: Major
>         Attachments: YARN-9041.001.patch, YARN-9041.002.patch, YARN-9041.003.patch, YARN-9041.004.patch,
YARN-9041.005.patch
>
>
> In FSPreemptionThread#identifyContainersToPreempt method, I suggest if AM preemption,
and locality relaxation is allowed, then the search space is expanded to all nodes changed
to the remaining nodes. The remaining nodes are equal to all nodes minus the potential nodes.
> Judging condition changed to:
>  # rr.getRelaxLocality()
>  # !ResourceRequest.isAnyLocation(rr.getResourceName())
>  # bestContainers != null
>  # bestContainers.numAMContainers > 0
> If I understand the deviation, please criticize me. thx~



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