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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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