Hmmm....
So...
At home I have a number of PCs - some running windows, some running Linux - with various functions; webserver, mailserver, fileserver, torrent box. One of the problems I've always had is that most of the time, the power of the H/W is underused except for short periods of extreme uses. Add to it the fact that if the box that the webserver (for example) runs on goes down, there goes my in-house webservice. Annoying.
A nice alternative would be to run a RAID-like array of H/W boxes, on which ran virtual machines (windows or Linux) which ran my services. This way, I could keep my services one to a "box" but would not loose said service if a power-supply decided to give up the ghost.
Seems to me we're possibly there. Can anyone point me to a cook-book to do the above?