[jira] [Commented] (YARN-6152) Used queue percentage not accurate in UI for 2.7 and below when using DominantResourceCalculator

["Jonathan Hung (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-6152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855033#comment-15855033 ] 

Jonathan Hung commented on YARN-6152:
-------------------------------------

[~eepayne], do you mind taking a look at this patch? Thanks!

> Used queue percentage not accurate in UI for 2.7 and below when using DominantResourceCalculator
> ------------------------------------------------------------------------------------------------
>
>                 Key: YARN-6152
>                 URL: https://issues.apache.org/jira/browse/YARN-6152
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.3
>            Reporter: Jonathan Hung
>            Assignee: Jonathan Hung
>         Attachments: dominantRC.png, YARN-6152-branch-2.7.001.patch
>
>
> YARN-4751 adds the {{getUsedCapacity}} and {{getAbsoluteUsedCapacity}} methods to {{AbstractCSQueue}} which is used to display queue usage in UI for branch-2.7 and below. However if there is more than one partition in the cluster, with different dominant resources, then queue usage may not be displayed as expected.
> Contrived example: Default partition has <90GB, 10vcores>, and "test" partition has <10GB, 90vcores>. {{root}} queue in default partition uses <30GB, 10vcores>. Here we expect queue usage to be 100 since it is using all vcores in default partition. But the displayed usage will be (30GB/100GB)/(90GB/100GB) = 33%.



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