[jira] [Commented] (YARN-9252) Allocation Tag Namespace support in Distributed Shell

["Prabhu Joseph (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-9252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758945#comment-16758945 ] 

Prabhu Joseph commented on YARN-9252:
-------------------------------------

Hi [~cheersyang], Have few doubts while integrating Allocation Tag Namespace when multiple target allocation tags present, can you help me to clarify.

Currently the Expression a=1,notin,node,b,c is converted to SingleConstraint with a TargetExpression with two allocation tags b and c under default SELF namespace.  

Does a=1,notin,node,NOT_SELF/b,SELF/c (both allocation tag has different namespace) valid?.

If valid, which of the below PlacementConstraint need to be used.

1.SingleConstraint with two TargetExpression - the first one with allocation tag b and namespace NOT_SELF and second one with allocation tag c and namespace SELF. 
or
2. SingleConstraint with a TargetExpression with two allocation tags - both with it's own namespace. In this case, we don't have an API to do that, allocationTagWithNamespace accepts one namespace for set of allocationTags, we will need allocationTagWithNamespace accepting set of pair of namespace and allocationTag.

If not valid, Can we support only one namespace for set of allocation tags like a=1,notin,node,NOT_SELF,b,c. The third token can be reserved for Allocation Tag Namespace in constraint expression.


> Allocation Tag Namespace support in Distributed Shell
> -----------------------------------------------------
>
>                 Key: YARN-9252
>                 URL: https://issues.apache.org/jira/browse/YARN-9252
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: distributed-shell
>    Affects Versions: 3.1.1
>            Reporter: Prabhu Joseph
>            Assignee: Prabhu Joseph
>            Priority: Major
>
> Distributed Shell supports placement constraint but allocation Tag Namespace is not honored.



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