RAC on VMware
There is an interesting article by Tarry Singh about Installing Oracle 10gR2 RAC on VMware. With VMware Server are being offered for free, I believe there will be more and more instances of Oracle running on VMware. But do we really want to have RAC on VMware? Perhaps I will use it for demo and learning purposes, but not in production system.
To me, nothing beats the real stuff. VMware will consume (often times) precious resources. We have the OS, the VMware, the OS within the VMware, and finally the Oracle DB. Just imagine how you will keep them all up-to-date with the patches, etc. Moreover, RAC is about high availability. Are you going to have 2 VMwares running 2 RAC's on a single BIG physical machine? One power failure, host OS crash and you lose all the connectivity. RAC is really about availability on the cheap commodity hardwares.
Moreover, the Oracle does not support RAC on VMware (Metalink Note:249212.1), at this time. So you are really on your own if there is any problems...