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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-947) Defining the history data classes for the implementation of the reading/writing interface
Date Wed, 23 Oct 2013 23:32:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13803542#comment-13803542
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Zhijie Shen commented on YARN-947:
----------------------------------

Thanks for the comments. Having discussion with [~vinodkv] and [~mayank_bansal]. Here's some
update:

1. Remove PBImpl, and change XXXXHistoryData to a simple object that containing of the fields.
Discuss the issue of changing readers to XXXXReport directly in a follow up ticket.

2. Now we can only modify the yarn_protos and YarnApplicationAttemptState to add the new state
enum. Need to file a follow up ticket to update the conversion method in RMServerUtils whenever
YARN-891 is done


> Defining the history data classes for the implementation of the reading/writing interface
> -----------------------------------------------------------------------------------------
>
>                 Key: YARN-947
>                 URL: https://issues.apache.org/jira/browse/YARN-947
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Zhijie Shen
>            Assignee: Zhijie Shen
>             Fix For: YARN-321
>
>         Attachments: YARN-947.1.patch, YARN-947.2.patch, YARN-947.3.patch, YARN-947.4.patch,
YARN-947.5.patch, YARN-947.6.patch
>
>
> We need to define the history data classes have the exact fields to be stored. Therefore,
all the implementations don't need to have the duplicate logic to exact the required information
from RMApp, RMAppAttempt and RMContainer.
> We use protobuf to define these classes, such that they can be ser/des to/from bytes,
which are easier for persistence.



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