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https://issues.apache.org/jira/browse/YARN-5946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870522#comment-15870522
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Wangda Tan commented on YARN-5946:
----------------------------------

[~jhung], 

APIs mentioned in your latest make sense to me. I suggest to keep 
{{List<Map<String, String>> getConfirmedConfHistory(long fromId)}} in the 
interface but we don't have to implement/use it as of now. The reason is, while 
implementing store, we can keep in mind that this is a future requirement so we 
can consider it while designing storage format.

> Create YarnConfigurationStore interface and InMemoryConfigurationStore class
> ----------------------------------------------------------------------------
>
>                 Key: YARN-5946
>                 URL: https://issues.apache.org/jira/browse/YARN-5946
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Jonathan Hung
>            Assignee: Jonathan Hung
>         Attachments: YARN-5946.001.patch, YARN-5946-YARN-5734.002.patch
>
>
> This class provides the interface to persist YARN configurations in a backing 
> store.



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