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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2056) Disable preemption at Queue level
Date Fri, 22 Aug 2014 00:14:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-2056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14106219#comment-14106219
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Wangda Tan commented on YARN-2056:
----------------------------------

Hi [~eepayne], 
I think you're right, we can skip the leafQueue, just return a null value in {{cloneQueue}}
when we want to skip it, and add it to TempQueue only if it's not null. 
But as you said, we need a the queue to properly calculate {{IdealAssignment}}, some queues
are missing may cause guaranteed resource cannot be calculate correct.

An alternative is,
Still add a config "disable-preemption" in queue level, and in {{getContainersToPreempt}},
we can check if a queue should skip. Any thoughts?

Thanks,
Wangda



> Disable preemption at Queue level
> ---------------------------------
>
>                 Key: YARN-2056
>                 URL: https://issues.apache.org/jira/browse/YARN-2056
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Mayank Bansal
>            Assignee: Eric Payne
>         Attachments: YARN-2056.201408202039.txt
>
>
> We need to be able to disable preemption at individual queue level



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