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From "Robert Joseph Evans (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4059) The history server should have a separate pluggable storage/query interface
Date Fri, 23 Mar 2012 15:01:27 GMT
The history server should have a separate pluggable storage/query interface
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                 Key: MAPREDUCE-4059
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4059
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: mrv2
    Affects Versions: 0.24.0, 0.23.3
            Reporter: Robert Joseph Evans
            Assignee: Robert Joseph Evans


The history server currently caches all parsed jobs in RAM.  These jobs can be very large
because of counters.  It would be nice to have a pluggable interface for the cacheing and
querying of the cached data so that we can play around with different implementations.  Also
just for cleanness of the code it would be nice to split the very large JobHistoryServer.java
into a few smaller ones that are more understandable and readable.

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