Vrushali C commented on YARN-3031:

Hi [~djp]

The AggregateUpTo enum has the tracks to aggregate along, the 
TimelineEntityType enum has the types of entities that can exist. There may not 
be aggregations along all entity types. 
For example: a query can be, give all the apps run by this user in the last 
week. This will read the data that is aggregated along the USER track. I think 
I can rename those with a YARN prefix though.

> [Storage abstraction] Create backing storage write interface for ATS writers
> ----------------------------------------------------------------------------
>                 Key: YARN-3031
>                 URL: https://issues.apache.org/jira/browse/YARN-3031
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Vrushali C
>         Attachments: Sequence_diagram_write_interaction.2.png, 
> Sequence_diagram_write_interaction.png, YARN-3031.01.patch, 
> YARN-3031.02.patch, YARN-3031.03.patch
> Per design in YARN-2928, come up with the interface for the ATS writer to 
> write to various backing storages. The interface should be created to capture 
> the right level of abstractions so that it will enable all backing storage 
> implementations to implement it efficiently.

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