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From "Siddharth Seth (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3755) Add the equivalent of JobStatus to end of JobHistory file
Date Mon, 05 Mar 2012 22:43:57 GMT

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

Siddharth Seth updated MAPREDUCE-3755:

    Issue Type: Sub-task  (was: Improvement)
        Parent: MAPREDUCE-3973
> 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: Sub-task
>          Components: jobhistoryserver, mrv2
>    Affects Versions: 0.23.0
>            Reporter: Arun C Murthy
>            Assignee: Bikas Saha
>            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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