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From "Matei Zaharia (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4522) Capacity Scheduler needs to re-read its configuration
Date Mon, 17 Nov 2008 06:18:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12648087#action_12648087
] 

Matei Zaharia commented on HADOOP-4522:
---------------------------------------

That makes sense. Out of curiosity, is there some part of the system other than the scheduler
that needs to look at queues? If not, then maybe those should also be put into the per-scheduler
file. I'm assuming that people won't switch between schedulers very often and so incompatibilities
between these won't be a problem.

> 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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