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From "He Yongqiang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5945) Support running multiple DataNodes/TaskTrackers simultaneously in a single node
Date Sun, 31 May 2009 02:06:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714805#action_12714805
] 

He Yongqiang commented on HADOOP-5945:
--------------------------------------

Yeah. I often do that too. But everytime i start the datanode/tasktracker manually. And let
that unoffical instances hb the master instance to add them in. So we can let the start script
start multiple slave instances.
>>Are you meaning to do this on production machines? 
why this can not be done 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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