Li Lu commented on YARN-3051:

bq. configs and metrics will be retrieved as part of an entity.
The most significant concern here is the size of configs and metrics. I think 
that's why [~sjlee0] is proposing a shallow view here. Still waiting for 
[~zjshen]'s confirmation for v1, but for v2 I think we may need something like 

> [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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