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Posted to mapreduce-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2015/01/26 16:08:35 UTC

[jira] [Updated] (MAPREDUCE-6141) History server leveldb recovery store

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Lowe updated MAPREDUCE-6141:
----------------------------------
    Attachment: MAPREDUCE-6141v2.patch

Thanks for the review, Jon!  Uploading the same patch again to kick Jenkins since it's been a while.  I'll commit this if Jenkins doesn't indicate any problems with the patch.

> History server leveldb recovery store
> -------------------------------------
>
>                 Key: MAPREDUCE-6141
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6141
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: jobhistoryserver
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>         Attachments: MAPREDUCE-6141.patch, MAPREDUCE-6141v2.patch, MAPREDUCE-6141v2.patch
>
>
> It would be nice to have a leveldb option to the job history server 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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