I have done this earlier by starting more than one Datanode on the same machine manually. Each instance of the Datanode has to have its own configuration directory. In the configuration, the names of the dfs.data.dir have to be different from one another.
Thanks, dhruba -----Original Message----- From: Lance Amundsen [mailto:[EMAIL PROTECTED] Sent: Friday, October 19, 2007 11:21 PM To: [email protected] Subject: Simulated Nodes How can I get more "real", but simulated Hadoop nodes for testing, without more machines? Can I add duplicate names in the slaves file? Or do I need separate IP's for everything? This is just for testing purposes. Ideally, I'd like to simulate a few nodes on my Windows laptop, to make it easier to debug actual distributed stuff. Maybe if I am clever with Cygwin, I could get several sessions communicating with each other using virtual IP's, albeit all through localhost. But would I have issues with a single hadoop directory structure if I did this?
