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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3479) Implement configuration items useful for Hadoop resource manager (v1)
Date Fri, 13 Jun 2008 15:42:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12604916#action_12604916
] 

Steve Loughran commented on HADOOP-3479:
----------------------------------------

'consistent': how the things are configured *and* how the configs are read are similar. You
don't want to go the java webapp way with an ear.xml, a war.xml, a persistence xml file, each
with their own syntax and a need to try and keep the things coherent.

As of 5 minutes ago, I have checked in the outline slides for the august UK talk, in which
I talk about managing the config and lifecycle of Hadoop nodes:

http://smartfrog.svn.sourceforge.net/viewvc/*checkout*/smartfrog/trunk/core/components/hadoop/doc/managing_hadoop.ppt

To handle hadoop configuration we had to subclass JobConf (as too much does instanceof JobConf
tests), binding to our own configuration source *and* replicating any private methods of Configuration
needed to serialize the configuration into the wire format, which is an XML document:

http://smartfrog.svn.sourceforge.net/viewvc/smartfrog/trunk/core/components/hadoop/src/org/smartfrog/services/hadoop/conf/ManagedConfiguration.java?view=markup

There was some discussion on HADOOP-24 on doing things to Configuration; what would seem best
would be to let different things be a source of configuration data, with the actual Configuration
class or subclass (including JobConf and HBaseConf) getting their input from that source.


> 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.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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