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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 Wed, 03 Jun 2009 00:10:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12715759#action_12715759
] 

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

>> dfs already has a tool called DataNodeCluster that allows to run multiple datanodes
in a node. I have used it in many of the large scale tests using only a small set of nodes.
The DataNodeCluster is a neat tool that I didn't know about. It should be given greater prominence
in the documentation....

> 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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