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Posted to yarn-issues@hadoop.apache.org by "Jian He (JIRA)" <ji...@apache.org> on 2014/11/20 01:17:34 UTC

[jira] [Commented] (YARN-2765) Add leveldb-based implementation for RMStateStore

    [ https://issues.apache.org/jira/browse/YARN-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14218766#comment-14218766 ] 

Jian He commented on YARN-2765:
-------------------------------

thanks Jason for working on this.  
It's useful to have leveldb as an option for RMStateStore, as its more lightweight compared to others. reviewing the patch 

> Add leveldb-based implementation for RMStateStore
> -------------------------------------------------
>
>                 Key: YARN-2765
>                 URL: https://issues.apache.org/jira/browse/YARN-2765
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>         Attachments: YARN-2765.patch, YARN-2765v2.patch
>
>
> It would be nice to have a leveldb option to the resourcemanager recovery store. Leveldb would provide some benefits over the existing filesystem store such as better support for atomic operations, fewer I/O ops per state update, and far fewer total files on the filesystem.



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