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https://issues.apache.org/jira/browse/HADOOP-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HADOOP-5945.
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    Resolution: Not a Problem

> Support running multiple DataNodes/TaskTrackers simultaneously in a single 
> node
> -------------------------------------------------------------------------------
>
>                 Key: HADOOP-5945
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5945
>             Project: Hadoop Common
>          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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