Junping Du commented on YARN-3033:

That's all good thoughts, [~sjlee0]! 
One quick question here:
bq. set up a start script that starts the per-node aggregator as a standalone 
Do we want it to be a separated process of NM? or an auxiliary service like: 
shuffle within NodeManager? Technically, I would  prefer the former choice 
because if NM down for upgrading, containers/applications could be still 
running so timeline service is still needed. Comparing with the later option, 
it need a bit more effort and need to consolidate with other work (like 
YARN-1593). Thoughts? 

> implement NM starting the ATS writer companion
> ----------------------------------------------
>                 Key: YARN-3033
>                 URL: https://issues.apache.org/jira/browse/YARN-3033
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
> Per design in YARN-2928, implement node managers starting the ATS writer 
> companion.

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