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https://issues.apache.org/jira/browse/YARN-3166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14329848#comment-14329848
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Zhijie Shen commented on YARN-3166:
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bq.  But as a general rule, I think there could be issues...

Yeah, could be, but hopefully it won't be significant. in YARN-3240, I've made 
patch to add new client APIs into TimelineClient. Taking a close look at 
TimelineClientImpl, the code of operating on old data model is relative a small 
piece, while will need to carry over most skeleton code as well as part of the 
APIs, i.e. DT operations.

> [Source organization] Decide detailed package structures for timeline service 
> v2 components
> -------------------------------------------------------------------------------------------
>
>                 Key: YARN-3166
>                 URL: https://issues.apache.org/jira/browse/YARN-3166
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Li Lu
>            Assignee: Li Lu
>
> Open this JIRA to track all discussions on detailed package structures for 
> timeline services v2. This JIRA is for discussion only.
> For our current timeline service v2 design, aggregator (previously called 
> "writer") implementation is in hadoop-yarn-server's:
> {{org.apache.hadoop.yarn.server.timelineservice.aggregator}}
> In YARN-2928's design, the next gen ATS reader is also a server. Maybe we 
> want to put reader related implementations into hadoop-yarn-server's:
> {{org.apache.hadoop.yarn.server.timelineservice.reader}}
> Both readers and aggregators will expose features that may be used by YARN 
> and other 3rd party components, such as aggregator/reader APIs. For those 
> features, maybe we would like to expose their interfaces to 
> hadoop-yarn-common's {{org.apache.hadoop.yarn.timelineservice}}? 
> Let's use this JIRA as a centralized place to track all related discussions. 



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