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From "Johan Gustavsson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4066) Large number of queues choke fair scheduler
Date Tue, 15 Sep 2015 21:48:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14746323#comment-14746323

Johan Gustavsson commented on YARN-4066:

Please let me know if there is anything I can do to continue the process of merging this

> Large number of queues choke fair scheduler
> -------------------------------------------
>                 Key: YARN-4066
>                 URL: https://issues.apache.org/jira/browse/YARN-4066
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.7.1
>            Reporter: Johan Gustavsson
>         Attachments: yarn-4066-1.patch
> Due to synchronization and all the loops performed during queue creation, setting a large
amount of queues (12000+) will completely choke the scheduler. To deal with this some optimization
to "QueueManager.updateAllocationConfiguration(AllocationConfiguration queueConf)" should
be done to reduce the amount of unnesecary loops. The attached patch have been tested to work
with atleast 96000 queues. 

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