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Posted to mapreduce-dev@hadoop.apache.org by "Arun C Murthy (Created) (JIRA)" <ji...@apache.org> on 2012/01/30 00:13:10 UTC

[jira] [Created] (MAPREDUCE-3755) Add the equivalent of JobStatus to end of JobHistory file

Add the equivalent of JobStatus to end of JobHistory file 
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                 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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