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https://issues.apache.org/jira/browse/YARN-6596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299699#comment-16299699
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Weiwei Yang commented on YARN-6596:
-----------------------------------

Figured allocation tags to nodes mapping is managed by 
{{AllocationTagsManager}} which is done in YARN-7522. :)

> Introduce Placement Constraint Manager module
> ---------------------------------------------
>
>                 Key: YARN-6596
>                 URL: https://issues.apache.org/jira/browse/YARN-6596
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Konstantinos Karanasos
>            Assignee: Konstantinos Karanasos
>         Attachments: YARN-6596-YARN-6592.001.patch
>
>
> This RM module will be responsible for storing placement constraints, 
> allocation tags, and node attributes.
> It will be used when determining the placement of SchedulingRequests with 
> constraints.



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