Zhankun Tang updated YARN-6720:

The draft proposal is attached. Please review if you're available. [~wangda], 

> Support updating FPGA related constraint node label after FPGA device 
> re-configuration
> --------------------------------------------------------------------------------------
>                 Key: YARN-6720
>                 URL: https://issues.apache.org/jira/browse/YARN-6720
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Zhankun Tang
>         Attachments: 
> Storing-and-Updating-extra-FPGA-resource-attributes-in-hdfs_v1.pdf
> In order to provide a global optimal scheduling for mutable FPGA resource, it 
> seems an easy and direct way to utilize constraint node labels(YARN-3409) 
> instead of extending the global scheduler(YARN-3926) to match both resource 
> count and attributes.
> The rough idea is that the AM sets the constraint node label expression to 
> request containers on the nodes whose FPGA devices has the matching IP, and 
> then NM resource handler update the node constraint label if there's FPGA 
> device re-configuration.

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