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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3479) Implement configuration items useful for Hadoop resource manager (v1)
Date Fri, 20 Jun 2008 20:17:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12606883#action_12606883
] 

Doug Cutting commented on HADOOP-3479:
--------------------------------------

> by limiting the new code to a separate class, and the new configuration to a separate
file, we isolate ourselves against too many changes to code in the future

Yes, but at a high cost.  Not only is code duplicated, but a new public API is added.  New
public APIs should only be added when we intend to support them long-term.  If you want to
implement something short-term, then it ought to be package-private, located with the rest
of your implementation, not grouped with other generic, public configuration APIs.

Until HADOOP-3579 is resolved, I would prefer an approach that leverages the existing Configuration
mechanism, perhaps with minor modifications if needed.  (For example, one might reasonably
wish to be able to create a Configuration from a file without reading hadoop-default.xml and
hadoop-site.xml.)

> 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.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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