Here’s an example of a SysGen hybrid model. As you can see, the client has an onsite server with local backup storage. Employees access their desktops, applications, files, printers, and email from the office using the local network. At the same time, data is backed up for redundancy to a cloud-based solution, and email is entirely in the cloud with Hosted Microsoft Exchange. The cloud configuration also gives employees anywhere access to their desktops, applications, files, printers, and email. (Click the photo to enlarge it).
Rather than being hosted on one single instances of a physical server, hosting is delivered on a virtual partition which draws its resource, such as disk space, from an extensive network of underlying physical servers. If one server goes offline it will have no effect on availability, as the virtual servers will continue to pull resource from the remaining network of servers.