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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3479) Implement configuration items useful for Hadoop resource manager (v1)
Date Fri, 06 Jun 2008 11:20:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12603000#action_12603000

Hemanth Yamijala commented on HADOOP-3479:

Some points in favor of a separate file for queue configuration:
- All parameters related to queues are controlled by administrators. These are needed only
by the Jobtracker for V1 of the Scheduler implementation
- The file needs to be monitored for updates periodically
- The format is more nested (> 1 level of hierarchy)
- In case the scheduler becomes separate from the JT (conceivably sometime in the future),
a separate file helps because we won't have to separate the configuration items out of hadoop
configuration then.

Given all these, I am thinking of implementing the following:
- Define a hadoop.scheduler.config variable in hadoop configuration that will define the name
of the config file for the Scheduler.
- From Jobtracker read this value and create a SchedulerConf class that will parse this file
and populate itself with the configuration parameters.
- The SchedulerConf class will provide APIs to get and set Scheduler related configuration
params, and also implement functionality such as looking for updates etc.

Please comment if you prefer a different approach.

> Implement configuration items useful for Hadoop resource manager (v1)
> ---------------------------------------------------------------------
>                 Key: HADOOP-3479
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3479
>             Project: Hadoop Core
>          Issue Type: New Feature
>            Reporter: Hemanth Yamijala
>            Assignee: Hemanth Yamijala
> HADOOP-3421 lists requirements for a new resource manager for Hadoop. Implementation
for these will require support for new configuration items in Hadoop. This JIRA is to define
such configuration, and track it's implementation.

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