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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1959) Fix headroom calculation in Fair Scheduler
Date Thu, 18 Sep 2014 19:26:35 GMT

    [ https://issues.apache.org/jira/browse/YARN-1959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139368#comment-14139368
] 

Karthik Kambatla commented on YARN-1959:
----------------------------------------

Approach looks good. Couple of comments: 
# Can we add a single method to SchedulingPolicy that takes "available" cluster resources,
queue's fairshare and current usage? May be, we can call that method computeHeadroom? 
# The amount of resources available in the cluster can be looked up in FairScheduler.rootMetrics.


> Fix headroom calculation in Fair Scheduler
> ------------------------------------------
>
>                 Key: YARN-1959
>                 URL: https://issues.apache.org/jira/browse/YARN-1959
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Sandy Ryza
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-1959.prelim.patch
>
>
> The Fair Scheduler currently always sets the headroom to 0.



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