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https://issues.apache.org/jira/browse/YARN-3904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14659016#comment-14659016
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Li Lu commented on YARN-3904:
-----------------------------

Thanks [~sjlee0]! Any other comments from anyone? This JIRA is currently 
blocking the POC patch of YARN-3817. 

> Refactor timelineservice.storage to add support to online and offline 
> aggregation writers
> -----------------------------------------------------------------------------------------
>
>                 Key: YARN-3904
>                 URL: https://issues.apache.org/jira/browse/YARN-3904
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Li Lu
>            Assignee: Li Lu
>         Attachments: YARN-3904-YARN-2928.001.patch, 
> YARN-3904-YARN-2928.002.patch, YARN-3904-YARN-2928.003.patch, 
> YARN-3904-YARN-2928.004.patch, YARN-3904-YARN-2928.005.patch, 
> YARN-3904-YARN-2928.006.patch, YARN-3904-YARN-2928.007.patch
>
>
> After we finished the design for time-based aggregation, we can adopt our 
> existing Phoenix storage into the storage of the aggregated data. In this 
> JIRA, I'm proposing to refactor writers to add support to aggregation 
> writers. Offline aggregation writers typically has less contextual 
> information. We can distinguish these writers by special naming. We can also 
> use CollectorContexts to model all contextual information and use it in our 
> writer interfaces. 



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