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https://issues.apache.org/jira/browse/YARN-5356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15592555#comment-15592555
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Kuhu Shukla commented on YARN-5356:
-----------------------------------
I think that if we do not have the values from the plugin we could initialize
the physicalResource to totalNodeResource (from conf values) instead of zero.
May be something like :
{code}
int physicalMemoryMb;
int physicalCores;
if (rcp != null) {
physicalMemoryMb = (int) rcp.getPhysicalMemorySize() / (1024 * 1024);
physicalCores = rcp.getNumProcessors();
} else {
physicalMemoryMb = conf.getInt(
YarnConfiguration.NM_PMEM_MB, YarnConfiguration.DEFAULT_NM_PMEM_MB)
+ conf.getInt(
YarnConfiguration.NM_SYSTEM_RESERVED_PMEM_MB, 0);
......
}
{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, YARN-5356.002.patch, YARN-5356.003.patch,
> YARN-5356.004.patch, YARN-5356.005.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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