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From "Arun C Murthy (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-3755) Add the equivalent of JobStatus to end of JobHistory file
Date Sun, 29 Jan 2012 23:13:10 GMT
Add the equivalent of JobStatus to end of JobHistory file 

                 Key: MAPREDUCE-3755
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3755
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: jobhistoryserver, mrv2
    Affects Versions: 0.23.0
            Reporter: Arun C Murthy
            Priority: Critical
             Fix For: 0.23.1

In MR1 we have the notion of CompletedJobStatus store to aid fast responses to job.getStatus.
We need the equivalent for MR2, an option is to add the jobStatus to the end of the JobHistory
file to which the JHS can easily jump ahead to and serve the query, it should also cache this
for a fair number of recently completed jobs.

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