Sangjin Lee commented on YARN-3049:

I like that approach better than the previous. Thanks for the update.

How would we be able to handle the "app finished" event? That needs to be 
supported too for other tables, and adding another flag to the context doesn't 
seem too appealing? Also, the timestamp of these events are important as they 
need to be written to some secondary tables. How can we captured them? If 
{{HBaseTimelineWriterImpl}} needs to recognize and read the event timestamp, 
then we might as well just look for those events, right? Any thoughts on these?

> [Storage Implementation] Implement storage reader interface to fetch raw data 
> from HBase backend
> ------------------------------------------------------------------------------------------------
>                 Key: YARN-3049
>                 URL: https://issues.apache.org/jira/browse/YARN-3049
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Zhijie Shen
>         Attachments: YARN-3049-WIP.1.patch, YARN-3049-WIP.2.patch, 
> YARN-3049-WIP.3.patch, YARN-3049-YARN-2928.2.patch, 
> YARN-3049-YARN-2928.3.patch, YARN-3049-YARN-2928.4.patch, 
> YARN-3049-YARN-2928.5.patch
> Implement existing ATS queries with the new ATS reader design.

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