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https://issues.apache.org/jira/browse/YARN-1864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13948162#comment-13948162
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Sandy Ryza commented on YARN-1864:
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Hey Ashwin,
Thanks for working on this. This is something I've thought we'd need for a
while.
I'd like to see this work with queue placement policies in the sense that one
should not always need to explicitly specify the parent queue when using this
feature. The queue placement policy should be able to handle both choosing the
parent queue and the user queue underneath. I realize this isn't super
straightforward to add under the queue placement policy design. A couple ideas
that I haven't fully thought through yet:
* Based on the "hierarchicalUserQueue" queue option, place the job in a user
queue after the queue placement policy assigns a parent queue.
* Have a "userQueueUnderQueue" queue placement rule that has another queue
placement rule nested inside of it. If the inner queue placement rule matches
the input and returns a queue, place the job in a user queue underneath that
queue.
If we can get the config file syntax to look decent, the latter seems somewhat
more elegant to me architecturally, because all the queue placement stuff is
concentrated in one place. Thoughts?
> 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
> Fix For: 2.4.0
>
> Attachments: YARN-1864-v1.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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