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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2257) Add user to queue mappings to automatically place users' apps into specific queues
Date Fri, 11 Jul 2014 10:17:08 GMT

    [ https://issues.apache.org/jira/browse/YARN-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14058612#comment-14058612
] 

Wangda Tan commented on YARN-2257:
----------------------------------

Hi [~Patrick Liu],
Thanks for creating this JIRA, I think it's a very useful feature and should be considered
to release soon.

To [~sandyr], I think it's better to make it as a basic module of YARN, other scheduler can
all benefit from it. W can simply implement a module can read from configuration, which will
return queue of following sequence:
- If queue defined in ApplicationSubmissionContext, use it,
- If userA->queueB defined, use queueB
- If groupA (userA belongs groupA)->queueB defined, use queueB
- use default queue otherwise.

We may need consider to create a separated service to load updated user->queue mapping
periodical as well. 
Any thoughts?

Thanks,
Wangda

> Add user to queue mappings to automatically place users' apps into specific queues
> ----------------------------------------------------------------------------------
>
>                 Key: YARN-2257
>                 URL: https://issues.apache.org/jira/browse/YARN-2257
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>            Reporter: Patrick Liu
>            Assignee: Vinod Kumar Vavilapalli
>              Labels: features
>
> Currently, the fair-scheduler supports two modes, default queue or individual queue for
each user.
> Apparently, the default queue is not a good option, because the resources cannot be managed
for each user or group.
> However, individual queue for each user is not good enough. Especially when connecting
yarn with hive. There will be increasing hive users in a corporate environment. If we create
a queue for a user, the resource management will be hard to maintain.
> I think the problem can be solved like this:
> 1. Define user->queue mapping in Fair-Scheduler.xml. Inside each queue, use aclSubmitApps
to control user's ability.
> 2. Each time a user submit an app to yarn, if the user has mapped to a queue, the app
will be scheduled to that queue; otherwise, the app will be submitted to default queue.
> 3. If the user cannot pass aclSubmitApps limits, the app will not be accepted.



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