hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3740) Make JobInProgress pluggable
Date Mon, 01 Sep 2008 13:32:44 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Abdelnur updated HADOOP-3740:
---------------------------------------

    Release Note: JobInProgress implementation is now pluggable (via hadoop-*.xml configuration).

> Make JobInProgress pluggable
> ----------------------------
>
>                 Key: HADOOP-3740
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3740
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>         Environment: all
>            Reporter: Alejandro Abdelnur
>         Attachments: patch3740.txt
>
>
> By allowing a pluggable JobInProgess it will be possible for provide implementations
that can do a sophisticated task provisioning to the JobTracker. 
> For example, by providing alternate implementations of the {{obtainNewMapTask}}, {{obtainNewReduceTask}}
and {{updateTaskInProgress}} it would be possible to implement a license server that allows
to throttle use of external resources (ie webservices, databases) so at any given time there
are not more than N tasks using a given resource. For this a task could be tagged with the
names of external resources and the license server would keep track of the tasks running per
tag, if the counter reaches zero then the {{obtainNew*Task}} method could return NULL instead
of a task.
>  

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message