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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4522) Capacity Scheduler needs to re-read its configuration
Date Tue, 28 Oct 2008 23:22:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643363#action_12643363
] 

dhruba borthakur commented on HADOOP-4522:
------------------------------------------

This command could be used by the FairShare scheduler too. (src/contrib/fairshare)

In the curret code, the Fair Share scheduler periodically checks the modification time of
its configuration file to detect any changes.

> Capacity Scheduler needs to re-read its configuration
> -----------------------------------------------------
>
>                 Key: HADOOP-4522
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4522
>             Project: Hadoop Core
>          Issue Type: New Feature
>            Reporter: Vivek Ratan
>
> An external application (an Ops script, or some CLI-based tool) can change the configuration
of the Capacity Scheduler (change the capacities of various queues, for example) by updating
its config file. This application then needs to tell the Capacity Scheduler that its config
has changed, which causes the Scheduler to re-read its configuration. It's possible that the
Capacity Scheduler may need to interact with external applications in other similar ways.


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