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Posted to mapreduce-issues@hadoop.apache.org by "Mahadev konar (Updated) (JIRA)" <ji...@apache.org> on 2012/02/21 20:19:46 UTC

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

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mahadev konar updated MAPREDUCE-3755:
-------------------------------------

    Target Version/s: 0.23.2  (was: 0.23.1)
       Fix Version/s:     (was: 0.23.1)
                      0.23.2
    
> 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: 0.23.2
>
>
> 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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