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Posted to mapreduce-dev@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2014/10/29 02:09:33 UTC

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

Jason Lowe created MAPREDUCE-6141:
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             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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