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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2484) Improve facilities for job-control, job-queues etc.
Date Thu, 03 Apr 2008 11:30:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585053#action_12585053
] 

Amar Kamat commented on HADOOP-2484:
------------------------------------

There should be some way to pass a *DAG* like structure. Look at the DAG node as a configuration.
So each node will represent a conf file. Users can generate conf files, arrange then in a
DAG and pass it to the {{JobControl}}. User should specify just the input folder(s) and the
output folder(s) and JC should generate/manage in-between output folders. The users can provide
hints if the intermediate job outputs are desired or not. Also some level of fault-tolerance
feature should be provided so that in case of some failures the _meta_ job should complete.


> Improve facilities for job-control, job-queues etc.
> ---------------------------------------------------
>
>                 Key: HADOOP-2484
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2484
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Arun C Murthy
>
> Today, Map-Reduce has _some_ support for job-control - basically JobClient provides a
facility to monitor jobs, one can setup a job-ending notification and there is {{JobControl}}.
> Links:
> http://lucene.apache.org/hadoop/docs/r0.15.1/mapred_tutorial.html#Job+Control
> http://lucene.apache.org/hadoop/docs/r0.15.1/mapred_tutorial.html#JobControl
> Looks like users could do more with better facilities for job-control and maybe more
advanced features like job-queues etc.
> Lets discuss... 

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