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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2532) Track pending resources at the application level
Date Wed, 10 Sep 2014 20:03:33 GMT

    [ https://issues.apache.org/jira/browse/YARN-2532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14129013#comment-14129013
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Karthik Kambatla commented on YARN-2532:
----------------------------------------

bq. For the FS at least, this is just FSAppAttempt.getDemand() - FSAppAttempt.getResourceUsage()
Yes, it is. Tracking pending resources separately is not necessary for YARN-2353. However,
demand for a queue or an app-attempt changes when the app requests more resources (increase
in pending resources) or containers complete (consumption goes down). Since we want to track
the pending resources information for YARN-2333, I thought we might as well do that first
and use that as a trigger to update the demand in YARN-2353. 

> Track pending resources at the application level 
> -------------------------------------------------
>
>                 Key: YARN-2532
>                 URL: https://issues.apache.org/jira/browse/YARN-2532
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: scheduler
>    Affects Versions: 2.5.1
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>
> SchedulerApplicationAttempt keeps track of current consumption of an app. It would be
nice to have a similar value tracked for pending requests. 
> The immediate uses I see are: (1) Showing this on the Web UI (YARN-2333) and (2) updating
demand in FS in an event-driven style (YARN-2353)



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