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Posted to common-dev@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2009/06/02 15:08:07 UTC

[jira] Commented: (HADOOP-5945) Support running multiple DataNodes/TaskTrackers simultaneously in a single node

    [ https://issues.apache.org/jira/browse/HADOOP-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12715519#action_12715519 ] 

Steve Loughran commented on HADOOP-5945:
----------------------------------------

The big issue is what do you gain by running >1 TT and DN per node, except on testing, where you want to give the master nodes more of a workload?

> 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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