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From "Owen O'Malley" <...@yahoo-inc.com>
Subject Re: dynamically adding slaves to hadoop cluster
Date Mon, 10 Mar 2008 16:16:10 GMT

On Mar 10, 2008, at 8:22 AM, Jason Venner wrote:

> Is there a /proper/ way to bring up the processes on the slave node  
> so that the master will recognize them at *stop* time?

yes, you can setup the pid files by using (directly on the newly  
added node!):

% bin/hadoop-daemon.sh start datanode
% bin/hadoop-daemon.sh start tasktracker

then the stop-all will know the pid to shut down. It is unfortunate  
that start-daemon.sh and start-daemons.sh differ only in the "s".  
start-daemons.sh should probably be start-slave-daemons.sh or something.

-- Owen

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