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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:
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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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