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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