I have 7 instances in a test environment on a single pair of nodes, generally we are running 3 or 4 databases per pair of nodes in this test envionment. Dont have any issues with it per se. Interconnects dont seem to have an issue RedHat 4 10.2 on HP blades and yes I voted Cheers ________________________________ From: Charles Schultz [mailto:sacrophyte@xxxxxxxxx] Sent: Tuesday, 1 May 2007 06:07 AM To: post.ethan@xxxxxxxxx Cc: oracle-l Subject: Re: RAC - Is it wise/ok/possible to run multiple databases across the same cluster? Barb Lundhild (Product Manager for RAC) stated at Collaborate07 that Oracle highly recommends a minimum of two CPUs per instance. And virtual cpus (ala VMWare) do not count. On 4/30/07, Ethan Post <post.ethan@xxxxxxxxx> wrote: Are there any technical limitations in regards to running multiple databases across the same set of servers in the same cluster? -- Charles Schultz