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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4090) Make Collections.sort() more efficient by caching resource usage
Date Sat, 09 Sep 2017 16:00:01 GMT

    [ https://issues.apache.org/jira/browse/YARN-4090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16159989#comment-16159989
] 

Daniel Templeton commented on YARN-4090:
----------------------------------------

Thanks for the updated patch, [~yufeigu].  Two comments.  First the management of preempted
containers' resources seems to run at odds with YARN-7057.  Maybe update this patch after
you commit that one?  Second, note that the CS {{AbstractCSQueue}} has {{incUsedResource()}}
and {{decUsedResource()}} methods already.  Maybe in the interest of commonality you could
see if it's worth pushing those up to {{Queue}} and using them instead of adding your own
methods for FS.

> Make Collections.sort() more efficient by caching resource usage
> ----------------------------------------------------------------
>
>                 Key: YARN-4090
>                 URL: https://issues.apache.org/jira/browse/YARN-4090
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: fairscheduler
>            Reporter: Xianyin Xin
>            Assignee: Yufei Gu
>         Attachments: sampling1.jpg, sampling2.jpg, YARN-4090.001.patch, YARN-4090.002.patch,
YARN-4090.003.patch, YARN-4090.004.patch, YARN-4090.005.patch, YARN-4090.006.patch, YARN-4090.007.patch,
YARN-4090-preview.patch, YARN-4090-TestResult.pdf
>
>
> Collections.sort() consumes too much time in a scheduling round.



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