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Posted to yarn-issues@hadoop.apache.org by "Johan Gustavsson (JIRA)" <ji...@apache.org> on 2015/09/15 23:48:46 UTC

[jira] [Commented] (YARN-4066) Large number of queues choke fair scheduler

    [ 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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