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Date: Mon, 15 Oct 2012 17:36:03 +0000 (UTC)
From: "Radim Kolar (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
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Subject: [jira] [Commented] (YARN-160) nodemanagers should obtain cpu/memory
 values from underlying OS
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    [ https://issues.apache.org/jira/browse/YARN-160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13476288#comment-13476288 ] 

Radim Kolar commented on YARN-160:
----------------------------------

there is a interface from obtaining these values from OS. Its called resourcecalculator plugin. It might be good to do autodetection but i need ability to override these values in config.
                
> nodemanagers should obtain cpu/memory values from underlying OS
> ---------------------------------------------------------------
>
>                 Key: YARN-160
>                 URL: https://issues.apache.org/jira/browse/YARN-160
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>    Affects Versions: 2.0.3-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 2.0.3-alpha
>
>
> As mentioned in YARN-2
> *NM memory and CPU configs*
> Currently these values are coming from the config of the NM, we should be able to obtain those values from the OS (ie, in the case of Linux from /proc/meminfo & /proc/cpuinfo). As this is highly OS dependent we should have an interface that obtains this information. In addition implementations of this interface should be able to specify a mem/cpu offset (amount of mem/cpu not to be avail as YARN resource), this would allow to reserve mem/cpu for the OS and other services outside of YARN containers.

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