Hitesh Shah commented on YARN-2928:

bq. We should have such a configuration that disables the timeline service 
Please explain what "globally" means.

bq. Can it be handled as a "flow of flows" as described in the design? For 
instance, tez application <-- hive queries <-- YARN apps? Or does it not 
capture the relationship?

Not sure I understand clearly as to how the relationship is captured. Consider 
this case: There are 5 hive queries: q1 to q5. There are 3 Tez apps: a1 to a3. 
Now, q1 and q5 ran on a1, q2 ran on a2 and q3,q4 ran on a3. Given q1, I need to 
know which app it ran on. Given a1, I need to know which queries ran on it. 
Could you clarify how this should be represented as flows? 

> Application Timeline Server (ATS) next gen: phase 1
> ---------------------------------------------------
>                 Key: YARN-2928
>                 URL: https://issues.apache.org/jira/browse/YARN-2928
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>            Priority: Critical
>         Attachments: ATSv2.rev1.pdf, ATSv2.rev2.pdf, Data model proposal 
> v1.pdf
> We have the application timeline server implemented in yarn per YARN-1530 and 
> YARN-321. Although it is a great feature, we have recognized several critical 
> issues and features that need to be addressed.
> This JIRA proposes the design and implementation changes to address those. 
> This is phase 1 of this effort.

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