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Posted to yarn-issues@hadoop.apache.org by "Wangda Tan (JIRA)" <ji...@apache.org> on 2017/12/29 23:07:02 UTC

[jira] [Commented] (YARN-7653) Rack cardinality support for AllocationTagsManager

    [ https://issues.apache.org/jira/browse/YARN-7653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16306593#comment-16306593 ] 

Wangda Tan commented on YARN-7653:
----------------------------------

Thanks [~pgaref] for working on the JIRA, it looks like the newly added logics only take care of rack cardinality. Please let me know if I missed any discussions or logic in the patch. Instead of hardcoded for the rack name, I think we should support generic node group concept. Otherwise, we have to redo all the changes in the patch to support generic node group. 

I just updated the title of the JIRA to better reflect its changes, and I suggest to change logic to support generic node group cardinality before the decay of code architecture.

Thoughts?

> Rack cardinality support for AllocationTagsManager
> --------------------------------------------------
>
>                 Key: YARN-7653
>                 URL: https://issues.apache.org/jira/browse/YARN-7653
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Panagiotis Garefalakis
>            Assignee: Panagiotis Garefalakis
>             Fix For: YARN-6592
>
>         Attachments: YARN-7653-YARN-6592.001.patch, YARN-7653-YARN-6592.002.patch, YARN-7653-YARN-6592.003.patch
>
>
> AllocationTagsManager currently supports node and cluster-wide tag cardinality retrieval.
> If we want to support arbitrary node-groups/scopes for our placement constraints TagsManager should be extended to provide such functionality.
> As a first step we need to support RACK scope cardinality retrieval (as defined in our API).
> i.e. how many "spark" containers are currently running on "RACK-1"



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