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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3051) [Storage abstraction] Create backing storage read interface for ATS readers
Date Tue, 30 Jun 2015 22:47:06 GMT

    [ https://issues.apache.org/jira/browse/YARN-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14609205#comment-14609205
] 

Sangjin Lee commented on YARN-3051:
-----------------------------------

bq. It's not that straightforward. For example, I can put entity 1 twice: one contains event
1 and the other contains event 2. In fact, when I want to retrieve the entity 1 with event
field included. I actually want to have both events. I can see two choices: one is to merge
the entity data at the write path and the other at the read path.

I think it would be easier (for the filesystem writer/reader) to do this on the read path.

> [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
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Varun Saxena
>         Attachments: YARN-3051-YARN-2928.003.patch, YARN-3051-YARN-2928.03.patch, YARN-3051-YARN-2928.04.patch,
YARN-3051-YARN-2928.05.patch, YARN-3051.Reader_API.patch, YARN-3051.Reader_API_1.patch, YARN-3051.Reader_API_2.patch,
YARN-3051.Reader_API_3.patch, YARN-3051.Reader_API_4.patch, YARN-3051.wip.02.YARN-2928.patch,
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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