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https://issues.apache.org/jira/browse/YARN-6596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16299401#comment-16299401
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Konstantinos Karanasos commented on YARN-6596:
----------------------------------------------

[~asuresh], I put some work on the Placement Constraint Manager, so I will take 
over this JIRA, if you don't mind. 
Especially the API is required for finalizing YARN-7612. I will post a first 
patch soon.

> 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: Arun Suresh
>
> 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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