When it comes to web hosting, cloud architecture refers to using a different server for every single part of the Internet hosting service. Such a configuration leads to improved performance as one machine will be used only for file storage, another one just for running databases, etcetera, which means that different system processes will not run on the very same machine. This will minimize the chance of system errors considerably and will allow your websites to run faster, not mentioning the greater uptime. In case you are looking for this type of service, you have to make certain that you will really get it as numerous companies advertise cloud web hosting plans, but the control panels they use aren't designed to work in a genuine cloud and can work only on a single server. The problem with using just a single machine is that in case one service goes down or generates high load, the whole server will most probably go offline, so your websites will no longer be accessible.