Virtualization technologies have caused a major change in the way we deliver and administer server-based infrastructure to our users. Virtualization provides a way for us to run multiple servers on the same hardware and maximize the use of that hardware.
Robert Heinlein frequently has his characters quote, “There ain’t no such thing as a free lunch.” This is also true in IT. The fact that we can run multiple servers on a single piece of hardware doesn’t make our jobs any easier. In fact, they become harder: