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https://issues.apache.org/jira/browse/YARN-7653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16301557#comment-16301557
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Arun Suresh commented on YARN-7653:
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Thanks [~pgaref] +1
> Node group 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
> 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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