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From "Li Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3906) split the application table from the entity table
Date Thu, 30 Jul 2015 21:42:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14648359#comment-14648359
] 

Li Lu commented on YARN-3906:
-----------------------------

Hi [~sjlee0], I looked at the patch, and have one general question. It appears that the application
table reuses most of the data schema of the entity table, with just some slight changes on
its row keys. I've also noticed that the newly added Application*.java files overlap significantly
with Entity*.java. While the current patch is totally fine in its core functions, I'm wondering
if it is possible to reuse most of the code from the entity table. Ideally, we may want to
build our *Table, *ColumnFamily, etc. on each new data schema, rather than on each new table?
IIUC, two most significant differences between the entity table and the application table
are table names and row key structures. Maybe we can change the Entity* classes to allow those
differences? Or, am I missing any key points here? 

> split the application table from the entity table
> -------------------------------------------------
>
>                 Key: YARN-3906
>                 URL: https://issues.apache.org/jira/browse/YARN-3906
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Sangjin Lee
>            Assignee: Sangjin Lee
>         Attachments: YARN-3906-YARN-2928.001.patch, YARN-3906-YARN-2928.002.patch
>
>
> Per discussions on YARN-3815, we need to split the application entities from the main
entity table into its own table (application).



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