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From "Patrick Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2257) Add user to queue mappings to automatically place users' apps into specific queues
Date Tue, 08 Jul 2014 10:50:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-2257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054818#comment-14054818

Patrick Liu commented on YARN-2257:

Hi, [~vinodkv].
Although I am new, I want challenges. And I will follow this thread. If I am capable of handling
it, I will try.
I am using hadoop2.0.0-cdh4.6.0. If I want to fix this issue, which version should I download
and try fix?

If we want to add the user->queue mapping ability in fair-scheduler, I think we should
enhance the QueueManagerInfo, and add a map containing user->queue mapping in QueueManager.
The mapping will only affect the process when a new application submitted, so the 'handle'
method in FairScheduler will be modified.
We can add a new method when 'APP_ADDED' occurred, and dispatch the app to the given queue
defined in user->queue map.

However as [~kkambatl] suggested, we should transfer QueuePlacementRule feature to yarn. 
If so, how many existing features will be affected?

> 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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