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Posted to yarn-issues@hadoop.apache.org by "Chandni Singh (JIRA)" <ji...@apache.org> on 2018/08/01 21:20:00 UTC

[jira] [Commented] (YARN-8509) Fix UserLimit calculation for preemption to balance scenario after queue satisfied

    [ https://issues.apache.org/jira/browse/YARN-8509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16566001#comment-16566001 ] 

Chandni Singh commented on YARN-8509:
-------------------------------------

LGTM

> Fix UserLimit calculation for preemption to balance scenario after queue satisfied  
> ------------------------------------------------------------------------------------
>
>                 Key: YARN-8509
>                 URL: https://issues.apache.org/jira/browse/YARN-8509
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: yarn
>            Reporter: Zian Chen
>            Assignee: Zian Chen
>            Priority: Major
>         Attachments: YARN-8509.001.patch, YARN-8509.002.patch, YARN-8509.003.patch
>
>
> In LeafQueue#getTotalPendingResourcesConsideringUserLimit, we calculate total pending resource based on user-limit percent and user-limit factor which will cap pending resource for each user to the minimum of user-limit pending and actual pending. This will prevent queue from taking more pending resource to achieve queue balance after all queue satisfied with its ideal allocation.
>   
>  We need to change the logic to let queue pending can go beyond userlimit.



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