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From "Eric Payne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2056) Disable preemption at Queue level
Date Sun, 24 Aug 2014 00:29:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-2056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14108210#comment-14108210
] 

Eric Payne commented on YARN-2056:
----------------------------------

[~leftnoteasy],
Thank you for your suggestion.

I tried implementing a {{DisablePreempt}} value in 2 separate ways:
# Inn the {{cloneQueue}} method, the implementation did not create a TempQueue if it was over
capacity and the {{DisablePreempt}} property is set.
# In the {{computeFixpointAllocation}} method, the implementation takes the Tempqueue out
of the list if it is over capacity and the {{DisablePreempt}} iproperty is set.

In either case, it did not preempt containers on the specified queue. However, it did not
preempt containers from the other over-capacity queues, either.

Please let me know if you have suggestions about how to better implement this to get the desired
behavior.

I think that the existing patch may be the best compromise, since it does provide the desired
functionality, and it also gives the administrator a little more flexibility in tuning preemption.

> 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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