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Posted to common-dev@hadoop.apache.org by "Runping Qi (JIRA)" <ji...@apache.org> on 2006/08/15 01:15:15 UTC
[jira] Commented: (HADOOP-322) Need a job control utility to submit
and monitor a group of jobs which have DAG dependency
[ http://issues.apache.org/jira/browse/HADOOP-322?page=comments#action_12427983 ]
Runping Qi commented on HADOOP-322:
-----------------------------------
Is there still a problem in commiting this patch?
I think the patch adds a good value to Hadoop APIs, and is pretty safe, since it does not affect the server side at all.
> 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
> Reporter: Runping Qi
> Assigned To: Runping Qi
> Attachments: job_control_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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