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From "Tao Yang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-7005) Skip unnecessary sorting and iterating process for child queues without pending resource to optimize schedule performance
Date Fri, 15 Dec 2017 11:03:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-7005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tao Yang updated YARN-7005:
---------------------------
    Attachment: YARN-7005.002.patch

> Skip unnecessary sorting and iterating process for child queues without pending resource
to optimize schedule performance
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-7005
>                 URL: https://issues.apache.org/jira/browse/YARN-7005
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.9.0, 3.0.0-alpha4
>            Reporter: Tao Yang
>         Attachments: YARN-7005.001.patch, YARN-7005.002.patch
>
>
> Nowadays even if there is only one pending app in a queue, the scheduling process will
go through all queues anyway and costs most of time on sorting and iterating child queues
in ParentQueue#assignContainersToChildQueues. 
> IIUIC, queues that have no pending resource can be skipped for sorting and iterating
process to reduce time cost, obviously for a cluster with many queues. Please feel free to
correct me if I ignore something else. Thanks.



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