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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4512) Provide a knob to turn on over-allocation
Date Wed, 13 Jan 2016 06:06:40 GMT

    [ https://issues.apache.org/jira/browse/YARN-4512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15095665#comment-15095665
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Wangda Tan commented on YARN-4512:
----------------------------------

[~kasha]/[~elgoiri],

Few questions:

IIUC, this patch wants NM to tells RM about if it can be over subscripted, correct? Since
NM already reports utilization to RM, do you think is it make sense to let RM make the over-subscription
decision? 

And what's the "threshold" means in ResourceThresholds? Does it means "can be oversubscript
when utilization less than the threshold" or "this is max resources could be over-subscripted".

> Provide a knob to turn on over-allocation
> -----------------------------------------
>
>                 Key: YARN-4512
>                 URL: https://issues.apache.org/jira/browse/YARN-4512
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: YARN-4512-YARN-1011.001.patch, yarn-4512-yarn-1011.002.patch, yarn-4512-yarn-1011.003.patch
>
>
> We need two configs for overallocation - one to specify the threshold upto which it is
okay to over-allocate, another to specify the threshold after which OPPORTUNISTIC containers
should be preempted.



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