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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3051) [Storage abstraction] Create backing storage read interface for ATS readers
Date Thu, 16 Apr 2015 23:01:22 GMT

    [ https://issues.apache.org/jira/browse/YARN-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14498928#comment-14498928
] 

Zhijie Shen commented on YARN-3051:
-----------------------------------

Thanks for summarize the proposal, Sangjin! Just think it out loudly. My major concern about
this proposal is compatibility. Previously in v1, timeline entity is globally unique, such
that when fetching a single entity before, users only need to provide <entity type, entity
id>. <app id, entity type, entity id> is required to locate one entity, and theoretically
 <null, entity type, entity id> will refer to multiple entities. It probably makes difficult
to be compatible to existing use cases.

/cc [~hitesh]



> [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.wip.patch, 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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