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From "Jakob Homan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5945) Support running multiple DataNodes/TaskTrackers simultaneously in a single node
Date Sat, 30 May 2009 17:09:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714746#action_12714746
] 

Jakob Homan commented on HADOOP-5945:
-------------------------------------

It's possible now to run multiple datanodes/tasktrackers on the same node, simply by writing
separate configuration files for each.  I do it quite often during testing.  There is some
limited discussion on the mailing lists for how to do this, but there certainly could be a
more concise, step-by-set set of instructions.  Are you meaning to do this on production machines?


> Support running multiple DataNodes/TaskTrackers simultaneously in a single node
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-5945
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5945
>             Project: Hadoop Core
>          Issue Type: New Feature
>            Reporter: He Yongqiang
>
> We should support multiple datanodes/tasktrackers running at a same node, only if they
do not share same port/local fs dir etc. I think Hadoop can be easily adapted to meet this.
 
> I guess at first and the major step is that we should modify the script to let it support
startting multiple datanode/tasktracker daemons in a same node.

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