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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4462) FairScheduler: Disallow preemption from a queue
Date Wed, 16 Dec 2015 21:29:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060909#comment-15060909

Karthik Kambatla commented on YARN-4462:

Today, FairScheduler allows disabling preemption *for* a queue. It makes sense to add the
ability to disable preemption *from* a queue as well. 

I have a couple of other FairScheduler items I am working on before I am able to get to this.
Let me know if anyone is interested in working on this. 

> FairScheduler: Disallow preemption from a queue
> -----------------------------------------------
>                 Key: YARN-4462
>                 URL: https://issues.apache.org/jira/browse/YARN-4462
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>    Affects Versions: 2.6.0
>            Reporter: Tao Jie
>            Assignee: Karthik Kambatla
> When scheduler preemption is enabled, applications could be preempted if they obtain
resource over they should take. 
> When a mapreduce application is preempted some resource, it just runs slower. However,
when the preempted application is a long-run service, such as tomcat running in slider, the
service would fail.
> So we should have a flag for application to indicate the scheduler that those application
should not be preempted. 

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