Discussion on:

How to decide which OS to use for Type II hypervisors

I think it's a matter of what you have and what works. Use whatever you have. I know that driver support is sometimes better on one platform than the other. Aside from that, once you are virtualized it doesn't really matter much anymore. So long as everything works. If you are installing a fresh new OS why not go with a VMWare type one? The VMWare hypervisor OS is actually a type of Linux that is designed from the ground up to be a host. It's ideal by definition.

I think it all depends on the user's needs and what host operating system that they are most comfortable with.

My experience with Windows is that both VMware and VirtualBox will work for most needs, with my preference going to VMware Player/Workstation. With Linux I have had horror stories about the use of VMware Server requiring full re-installation each kernel update. For Apple users, VMware Fusion Seems to integrate well with most software deployments.

I have been playing with VBox and VMware for a while now, and have experimented with several host OSs. I have a Dell 690 with 16GM of RAM dual-booting into either Win XP 64-bit or Ubuntu 10.04 64-bit. I have a third hard drive with all the virtual hard disk (*.VDI). I have created several VMs in both OSs with exactly the same characteristics. When I boot into Windows, I can only run about four VMs at the same time, but I boot into Ubuntu, I can run up to eight VMs simultaneously.