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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6418) Reduce Resource object creation and overhead in Capacity scheduler inner loop
Date Fri, 31 Mar 2017 18:28:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-6418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15951451#comment-15951451
] 

Wangda Tan commented on YARN-6418:
----------------------------------

[~roniburd]/[~asuresh]. 

I have done some similar works in YARN-6245 while working on the scheduler perf profiling
before, please see the patch: https://issues.apache.org/jira/secure/attachment/12854991/YARN-6245.preliminary-staled.1.patch.

Please let me know if we're talking about the same thing. I suggest to move this JIRA to YARN-6242
for better tracking.

> Reduce Resource object creation and overhead in Capacity scheduler inner loop
> -----------------------------------------------------------------------------
>
>                 Key: YARN-6418
>                 URL: https://issues.apache.org/jira/browse/YARN-6418
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler, resourcemanager
>    Affects Versions: 2.7.3, 3.0.0-alpha2, 2.8
>            Reporter: Roni Burd
>            Assignee: Roni Burd
>
> Resource object is used multiple due to ResourceCalculator creates new instances on every
method call. This gets called several times on each node HB. Resource is a very expensive
object that relies on Protobufs 
> The change is to remove the need to use protobuf on the Resource object and avoid creating
many objects in the Resource Calculator all the time



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