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 

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?


> 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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