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https://issues.apache.org/jira/browse/YARN-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14496490#comment-14496490
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Zhijie Shen commented on YARN-3051:
-----------------------------------

Hence, regardless the implementation detail, we logically use:

1. <entity type, entity id> to identify entities that are generated on the same 
cluster.
2. <cluster id, entity type, entity id> to identify entities globally across 
clusters.

In terms of compatibility, {{getTimelineEntity(entity type, entity id)}} can 
assume the cluster ID is either the default one or configured in yarn-site.xml.

Does it sound good?

> [Storage abstraction] Create backing storage read interface for ATS readers
> ---------------------------------------------------------------------------
>
>                 Key: YARN-3051
>                 URL: https://issues.apache.org/jira/browse/YARN-3051
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
>         Attachments: YARN-3051_temp.patch
>
>
> Per design in YARN-2928, create backing storage read interface that can be 
> implemented by multiple backing storage implementations.



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