When it comes to Internet hosting, cloud architecture refers to using a different server for every single part of the hosting service. Such a setup leads to improved performance since 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 exact same machine. This will minimize the probability of system errors significantly and will allow your sites to work faster, not mentioning the greater uptime. When you're looking for this type of service, you should make sure that you will really receive it as numerous companies advertise cloud web hosting packages, however the control panels they use are not designed to work in a genuine cloud and can operate only on one server. The issue with using just a single machine is that in case one service crashes or generates high load, the whole server will most probably go offline, so your Internet sites will no longer be accessible.