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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 Mon, 30 Jun 2008 16:21:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12609281#action_12609281

Hemanth Yamijala commented on HADOOP-3479:

Summary of the changes in the patch:

2 changes are made to the core Configuration class:

- Added a new constructor that can be used to avoid loading the default resources (hadoop-site
and hadoop-defaults)
- Added a new API to reload configuration, by clearing the current list of properties, overlay
and final parameters. The next set of calls will cause the data structures to be filled again
from the resources that are already added. We needed this functionality for the resource manager
configuration. I don't know enough about the Configuration class's usage to check if this
API addition is valid or not. If there are things I have missed, and this API is not suitable
for Configuration, it can be implemented only for the resource manager class.

In addition to the above, I've added a ResourceManagerConf class that is package private to
org.apache.hadoop.mapred, and provides getter and setter methods for various configuration
parameters needed for the resource manager. It also provides an option to print out the options
to a standard output. This will facilitate building the pretty printing tools that Owen mentioned

Added unit tests for both Configuration and ResourceManagerConf. 

Comments please.

> 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
>         Attachments: 3479.1.patch, 3479.2.patch, 3479.patch
> 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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