When it comes to Internet hosting, cloud architecture refers to using a separate server for each and every aspect of the web hosting service. Such a configuration leads to much better performance since one machine will be used just for file storage, another only for running databases, etcetera, thus different system processes will not run on the very same machine. The latter will decrease the probability of system errors substantially and will allow your websites to work faster, not mentioning the greater uptime. In case you are looking for such a service, you need to make certain that you will really get it since many companies advertise cloud web hosting packages, but the control panels they use are not designed to work in a true cloud and can operate only on a single server. The problem with using just a single machine is that if one service goes down or generates high load, the entire server will almost certainly go offline, so your sites will no longer be accessible.