VirtualBox is great for testing, but it lacks many of the enterprise features available in VMWare of Hyper-V. Similarly Xen is a great platform, but lacks some of the flexibility you get from the two options I mention above.
VirtualBox is great for testing, but it lacks many of the enterprise features available in VMWare of Hyper-V. Similarly Xen is a great platform, but lacks some of the flexibility you get from the two options I mention above.