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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1864) Fair Scheduler Dynamic Hierarchical User Queues
Date Wed, 07 May 2014 00:50:24 GMT

    [ https://issues.apache.org/jira/browse/YARN-1864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13991419#comment-13991419
] 

Sandy Ryza commented on YARN-1864:
----------------------------------

+1 pending Jenkins

> Fair Scheduler Dynamic Hierarchical User Queues
> -----------------------------------------------
>
>                 Key: YARN-1864
>                 URL: https://issues.apache.org/jira/browse/YARN-1864
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: scheduler
>            Reporter: Ashwin Shankar
>              Labels: scheduler
>         Attachments: YARN-1864-v1.txt, YARN-1864-v2.txt, YARN-1864-v3.txt, YARN-1864-v4.txt,
YARN-1864-v5.txt, YARN-1864-v6.txt
>
>
> In Fair Scheduler, we want to be able to create user queues under any parent queue in
the hierarchy. For eg. Say user1 submits a job to a parent queue called root.allUserQueues,
we want be able to create a new queue called root.allUserQueues.user1 and run user1's job
in it.Any further jobs submitted by this user to root.allUserQueues will be run in this newly
created root.allUserQueues.user1.
> This is very similar to the 'user-as-default' feature in Fair Scheduler which creates
user queues under root queue. But we want the ability to create user queues under ANY parent
queue.
> Why do we want this ?
> 1. Preemption : these dynamically created user queues can preempt each other if its fair
share is not met. So there is fairness among users.
> User queues can also preempt other non-user leaf queue as well if below fair share.
> 2. Allocation to user queues : we want all the user queries(adhoc) to consume only a
fraction of resources in the shared cluster. By creating this feature,we could do that by
giving a fair share to the parent user queue which is then redistributed to all the dynamically
created user queues.



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