Varun Saxena commented on YARN-3051:

For the point about shallow view of entity, we can then say if 
{{fieldsToRetrieve}} is null i.e. client does not specify which fields to 
retrieve, store implementation will return all fields except configs and 
I can add another special field called "all" which would indicate all fields 
will have to be retrieved. So if client specifies fields=all in REST URL, 
storage implementation will fetch all the fields. Thoughts ?

> [Storage abstraction] Create backing storage read interface for ATS readers
> ---------------------------------------------------------------------------
>                 Key: YARN-3051
>                 URL: https://issues.apache.org/jira/browse/YARN-3051
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
> Per design in YARN-2928, create backing storage read interface that can be 
> implemented by multiple backing storage implementations.

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