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Posted to issues@yunikorn.apache.org by "Tzu-Hua Lan (Jira)" <ji...@apache.org> on 2024/08/27 05:13:00 UTC

[jira] [Commented] (YUNIKORN-2840) sortQueues: fair max performance and correctness change

    [ https://issues.apache.org/jira/browse/YUNIKORN-2840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17876912#comment-17876912 ] 

Tzu-Hua Lan commented on YUNIKORN-2840:
---------------------------------------

Hi, would like to take this issue. Thank you.

> sortQueues: fair max performance and correctness change
> -------------------------------------------------------
>
>                 Key: YUNIKORN-2840
>                 URL: https://issues.apache.org/jira/browse/YUNIKORN-2840
>             Project: Apache YuniKorn
>          Issue Type: Improvement
>          Components: core - scheduler
>            Reporter: Wilfred Spiegelenburg
>            Priority: Major
>
> In YUNIKORN-2678 the fair queue sorting was improved to take guaranteed quota into account correctly. During the review there were two minor points left over that would need improving:
>  * performance
>  * correctness on change 
> Currently {{GetFairMaxResource()}} gets called for each child this does a recursive call back up the queue hierarchy. This is a performance loss specially when sorting a deep hierarchy or a larger number of children.
> The parent details for a real fair comparison between the children should also not change. When they do, as in the current implementation, two children might use different inputs when sorted.



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