In the hosting field, cloud architecture describes using different servers for each and every service that is a part of the internet hosting service. In other words, your files, databases and emails will not run on the exact same machine, but on separate ones. Such a configuration results in higher uptime and superior overall performance because only one type of system processes will work on the server, so the system resources will be utilized as efficiently as possible. A large number of web hosting service providers nowadays advertise their cloud services, but what they provide is not actual cloud architecture for the simple reason that the hosting control panels they use are not designed to work on anything different from an individual server. In case everything runs using one machine, a problem with just a single service could take the server offline. In this light, if you are looking for cloud hosting, you should verify if the service you'll get is truly a cloud one or if it is a marketing trick.