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From "Li Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3051) [Storage abstraction] Create backing storage read interface for ATS readers
Date Wed, 15 Apr 2015 01:03:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14495494#comment-14495494

Li Lu commented on YARN-3051:

bq. Want to loop in Li Lu and Vrushali C. Guys, would it be a non-trivial requirement to enforce
uniqueness of (cluster id, entity type, entity id) when it comes to storage?
My hunch is it should not be hard for both hbase and Phoenix if we have the index table proposed
by [~zjshen]:
bq. In addition, I think we need to have a index table such as <entity type, entity id,
pointer to the entity in entity table> to support the single entity query.
In phoenix, PKs cannot be identical. In hbase, we can check if the row key exists before we
write to that cell. So I assume this is not hard. Am I missing anything here?

> [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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