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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5961) DataNode should understand generic hadoop options
Date Tue, 02 Jun 2009 22:17:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12715720#action_12715720
] 

Jakob Homan commented on HADOOP-5961:
-------------------------------------

+1 on the patch. Works as advertised.  Is there any reason not to include the script and integrate
it with the other shell scripts? The script works fine, but would need some validation (can
only open 10 datanodes as it stands), header file, etc.  This would make it easy for other
developers to use without having to track down this JIRA months or years from now.


> DataNode should understand generic hadoop options
> -------------------------------------------------
>
>                 Key: HADOOP-5961
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5961
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: dfs
>            Reporter: Raghu Angadi
>            Assignee: Raghu Angadi
>         Attachments: HADOOP-5961.patch, run-datanode.sh
>
>
> DataNode should use ToolRunner to parse generic hadoop options (like -Dconfig.var=value).
Apart from being more consistent with rest of the hadoop programs, this is necessary to write
a simple script to run multiple datanodes on the same node.
> I had proposed a simple shell script to running multiple datanodes on a the user mailing
list http://www.nabble.com/Contributing-to-hadoop-td22198897.html, but it requires that DataNode
parses -D option.
> I will submit a patch and a shell script that works.

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