You can run in Standalone mode following the quickstart instructions (google hadoop standalone or hbase standalone). The other option is pseudo-distributed mode where it's the same OS uses a different JavaVM.

I agree with Marcos, either you need a commercial virtualization layer that lets you run double kernels natively (which on a Duo core--which I doubt has the memory--won't really be that useful) or VMware.

On 5/9/2012 12:11 PM, Michael Segel wrote:
Too small a machine.

Better question. Why do you want to get 2 nodes on one machine?

On May 9, 2012, at 1:49 PM, Marcos Ortiz wrote:

Which is your current hardware configuration?
1- One way is to use two VMs in Vmware Workstation, Vmware Server, or 
Virtualbox, with similar configuration for these two DNs, but
you should have in mind that HBase needs a lot of RAM to work properly, so I 
don't recommend to use a single machine to run two DN.


On 05/09/2012 02:17 PM, MapHadoop wrote:
Hi,
Im trying to get Duo core computer to run 2 data nodes on Hadoop.
What do I have to do to add the other node as a slave?

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