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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3489) RMServerUtils.validateResourceRequests should only obtain queue info once
Date Fri, 08 May 2015 17:41:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-3489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535050#comment-14535050
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Varun Saxena commented on YARN-3489:
------------------------------------

Its quite similar to what I have done. Added a new queueInfo parameter in a new API.
I did not change the old API {{SchedulerUtils#normalizeAndvalidateRequest}} (which is without
queueInfo) because it is marked as public.

> RMServerUtils.validateResourceRequests should only obtain queue info once
> -------------------------------------------------------------------------
>
>                 Key: YARN-3489
>                 URL: https://issues.apache.org/jira/browse/YARN-3489
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Varun Saxena
>         Attachments: YARN-3489.01.patch, YARN-3489.02.patch
>
>
> Since the label support was added we now get the queue info for each request being validated
in SchedulerUtils.validateResourceRequest.  If validateResourceRequests needs to validate
a lot of requests at a time (e.g.: large cluster with lots of varied locality in the requests)
then it will get the queue info for each request.  Since we build the queue info this generates
a lot of unnecessary garbage, as the queue isn't changing between requests.  We should grab
the queue info once and pass it down rather than building it again for each request.



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