This is why professional hosting providers and large enterprises have complex system architecture which spans many machines in often multiple datacenters, sometimes even on multiple continents. While for most internet users a simple Apache or IIS stand alone webserver is enough, for the owners of PaP Hosting, it is not. Time and time again we have seen people (ourselves included) be caught by single machine failure, lack of documented configuration, upgrades going astray, lack of backup and other operationa