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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5342) Improve non-exclusive node partition resource allocation in Capacity Scheduler
Date Mon, 25 Jul 2016 00:44:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15391216#comment-15391216
] 

Naganarasimha G R commented on YARN-5342:
-----------------------------------------

Thanks [~sunilg], Patch LGTM.

> Improve non-exclusive node partition resource allocation in Capacity Scheduler
> ------------------------------------------------------------------------------
>
>                 Key: YARN-5342
>                 URL: https://issues.apache.org/jira/browse/YARN-5342
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Wangda Tan
>            Assignee: Sunil G
>         Attachments: YARN-5342.1.patch, YARN-5342.2.patch, YARN-5342.3.patch, YARN-5342.4.patch
>
>
> In the previous implementation, one non-exclusive container allocation is possible when
the missed-opportunity >= #cluster-nodes. And missed-opportunity will be reset when container
allocated to any node.
> This will slow down the frequency of container allocation on non-exclusive node partition:
*When a non-exclusive partition=x has idle resource, we can only allocate one container for
this app in every X=nodemanagers.heartbeat-interval secs for the whole cluster.*
> In this JIRA, I propose a fix to reset missed-opporunity only if we have >0 pending
resource for the non-exclusive partition OR we get allocation from the default partition.



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