Inigo Goiri commented on YARN-3482:

[~grey], the ultimate target of this task is to provide an interface for 
external applications to change the amount of available resources in a node.
A part of YARN-3332 targets a smarter way of calculating the amount of 
resources available to an NM, this can be somewhat related but I think this 
effort is still needed.

Anyway, thanks for the pointer as I'm targetting some of the sub-tasks 
described in that task.

> 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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