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From "Nathan Roberts (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5356) NodeManager should communicate physical resource capability to ResourceManager
Date Mon, 19 Sep 2016 22:02:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-5356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15504823#comment-15504823
] 

Nathan Roberts commented on YARN-5356:
--------------------------------------

Hi [~elgoiri]. Tried out the patch but get NPE in RM because physicalResource is null. Think
this code in org.apache.hadoop.yarn.server.api.protocolrecords.impl.pb.RegisterNodeManagerRequestPBImpl.setPhysicalResource
needs to set it via the builder as well.
{code}
  @Override
  public synchronized void setPhysicalResource(Resource pPhysicalResource) {
    maybeInitBuilder();
    if (pPhysicalResource == null) {
      builder.clearPhysicalResource();
    }
    this.physicalResource = pPhysicalResource;
  }
{code}

> NodeManager should communicate physical resource capability to ResourceManager
> ------------------------------------------------------------------------------
>
>                 Key: YARN-5356
>                 URL: https://issues.apache.org/jira/browse/YARN-5356
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager, resourcemanager
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Nathan Roberts
>            Assignee: Inigo Goiri
>         Attachments: YARN-5356.000.patch, YARN-5356.001.patch, YARN-5356.002.patch
>
>
> Currently ResourceUtilization contains absolute quantities of resource used (e.g. 4096MB
memory used). It would be good if the NM also communicated the actual physical resource capabilities
of the node so that the RM can use this data to schedule more effectively (overcommit, etc)
> Currently the only available information is the Resource the node registered with (or
later updated using updateNodeResource). However, these aren't really sufficient to get a
good view of how utilized a resource is. For example, if a node reports 400% CPU utilization,
does that mean it's completely full, or barely utilized? Today there is no reliable way to
figure this out.
> [~elgoiri] - Lots of good work is happening in YARN-2965 so curious if you have thoughts/opinions
on this?



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