[ http://issues.apache.org/jira/browse/HADOOP-322?page=all ]

Runping Qi updated HADOOP-322:
------------------------------

    Attachment: jobcontrol_patch.txt

> Need a job control utility to submit and monitor a group of jobs which have 
> DAG dependency
> ------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-322
>                 URL: http://issues.apache.org/jira/browse/HADOOP-322
>             Project: Hadoop
>          Issue Type: New Feature
>    Affects Versions: 0.5.0
>            Reporter: Runping Qi
>         Assigned To: Runping Qi
>             Fix For: 0.6.0
>
>         Attachments: jobcontrol_patch.txt
>
>
> In my applications, some jobs depend on the outputs of other jobs. Therefore, 
> job dependency forms a DAG. A job is ready to run if and only if it does not 
> have any dependency or all the jobs it depends are finished successfully. To 
> help schedule and monitor a group of jobs like that, I am thinking of 
> implementing a utility that:
>       - accept jobs with dependency specification
>       - monitor job status
>       - submit jobs when they are ready
> With such a utility, the application can construct its jobs, specify their 
> dependency and then hand the jobs to the utility class. The utility takes 
> care of the details of job submission.
> I'll post my design skech for comments/suggestion.
> Eventually, I'll submit a patch for the utility.

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