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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-6141) History server leveldb recovery store
Date Wed, 29 Oct 2014 01:09:33 GMT
Jason Lowe created MAPREDUCE-6141:
-------------------------------------

             Summary: 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


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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