add script that backups job statistics
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Key: MAPREDUCE-1792
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1792
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: jobtracker
Affects Versions: 0.20.2
Reporter: Ted Yu
When cluster is terminated, job statistics from previous execution is lost.
A script should be created to backup job statistics so that analysis can be
performed across cluster restart.
A utility to visualize job statistics is also desirable.
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