[jira] [Commented] (YARN-5764) NUMA awareness support for launching containers

["Rohith Sharma K S (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-5764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15803837#comment-15803837 ] 

Rohith Sharma K S commented on YARN-5764:
-----------------------------------------

Thanks [~devaraj.k] for design doc, I skimmed through the design doc and patch, 
One questions
# NUMA resources is scheduled by by NodeManager. Why can't RM make the decision of scheduling NUMA resources using resource profilers.?
# Could you elaborate, why there are multiple numa-awareness.node-ids in single machine?

> NUMA awareness support for launching containers
> -----------------------------------------------
>
>                 Key: YARN-5764
>                 URL: https://issues.apache.org/jira/browse/YARN-5764
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: nodemanager, yarn
>            Reporter: Olasoji
>            Assignee: Devaraj K
>         Attachments: NUMA Awareness for YARN Containers.pdf, YARN-5764-v0.patch, YARN-5764-v1.patch
>
>
> The purpose of this feature is to improve Hadoop performance by minimizing costly remote memory accesses on non SMP systems. Yarn containers, on launch, will be pinned to a specific NUMA node and all subsequent memory allocations will be served by the same node, reducing remote memory accesses. The current default behavior is to spread memory across all NUMA nodes.



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