Fabio, You don't need 4 machines. You can put everything on a single machine. That is the easiest to get started. Once you have a cluster running on a single machine then you can spread out over multiple machines.
Best, Bill -----Original Message----- From: Fabio A. Miranda [mailto:[email protected]] Sent: Tuesday, November 09, 2010 1:48 PM To: [email protected] Subject: Cluster setup hello, I am trying to setup an Hadoop cluster. From the docs, it says I need two master: NameNode and Jobtracker and one slave: datanode, tasktracker. so, I need at least 4 machines to set up a cluster with hadoop ? How can I define the role of each machine if core-site.xml needs to be the same ? regards, fabio.
