When it comes to web hosting, cloud architecture refers to using an independent server for every single aspect of the web hosting service. Such a configuration provides significantly better performance because one machine will be used just for file storage, a different one just for running databases, and so on, which means that different system processes will not run on the same machine. This will lessen the probability of system errors considerably and will allow your sites to work faster, not mentioning the higher uptime. When you are looking for this type of service, you need to make certain that you will really receive it because a lot of companies advertise cloud hosting packages, but the control panels they use aren't designed to function in a true cloud and can operate only on a single server. The trouble with using one machine is that if one service fails or generates high load, the whole server will most probably go offline, so your websites will no longer be accessible.