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From "Yang Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6578) Return container resource utilization from NM ContainerStatus call
Date Wed, 10 May 2017 09:49:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-6578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16004415#comment-16004415
] 

Yang Wang commented on YARN-6578:
---------------------------------

[~Naganarasimha], thanks for your reply.
I plan to get usage from ContainerMetrics and return in ContainerStatus.
If you worry about this will make the NM heartbeat getting bigger, we could set the utilization
only in the response of  NMClient.getContainerStatus.

{code}
ContainerImpl.cloneAndGetContainerStatus()
...
      ContainerMetrics metrics = ContainerMetrics.getContainerMetrics(this.containerId);
      if (metrics != null) {
        status.setUtilization(ResourceUtilization
            .newInstance((int) metrics.pMemMBsStat.lastStat().mean(), 0,
                (float) metrics.cpuCoreUsagePercent.lastStat().mean()));
      } else {
        status.setUtilization(ResourceUtilization.newInstance(0, 0, 0));
      }
...
{code}

> Return container resource utilization from NM ContainerStatus call
> ------------------------------------------------------------------
>
>                 Key: YARN-6578
>                 URL: https://issues.apache.org/jira/browse/YARN-6578
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Yang Wang
>
> When the applicationMaster wants to change(increase/decrease) resources of an allocated
container, resource utilization is an important reference indicator for decision making. 
So, when AM call NMClient.getContainerStatus, resource utilization needs to be returned.



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