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https://issues.apache.org/jira/browse/YARN-3482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14493177#comment-14493177
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Inigo Goiri commented on YARN-3482:
-----------------------------------
The NM would have an interface (maybe a configuration file) to change how many
resources are available. The NM would send this information in the NodeStatus
to the RM in every heartbeat as is done at registration time. This information
would be exposed through the Web UI as is now.
This will have some implications when the available resources go lower than the
allocated capacity.
> Report NM available resources in heartbeat
> ------------------------------------------
>
> Key: YARN-3482
> URL: https://issues.apache.org/jira/browse/YARN-3482
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: nodemanager, resourcemanager
> Affects Versions: 2.7.0
> Reporter: Inigo Goiri
> Original Estimate: 504h
> Remaining Estimate: 504h
>
> NMs are usually collocated with other processes like HDFS, Impala or HBase.
> To manage this scenario correctly, YARN should be aware of the actual
> available resources. The proposal is to have an interface to dynamically
> change the available resources and report this to the RM in every heartbeat.
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