The primary disadvantage to using a VPS is its lack of performance. The organization that provides the VPS will typically throttle the server's performance in an effort to maximize the number of VPSs that the physical server is able to accommodate. In the unlikely event that the VPS's performance is not throttled, it then becomes possible for an adjacent VPS to consume excessive resources, to the point of impacting the VPS's performance.
If you already have a number of clients hosted with various other cPanel-based hosts, our VPS Hosting plans all come with Launch Assist, 2 free hours of time with our System Administrators that can be used for migrating your sites. cPanel also has a powerful interface for transferring multiple accounts, providing you have root and SSH access to your current server. This transfer tool, which has step-by-step walkthrough and documentation on the cPanel site, was created to help designers, developers and agencies to quickly and easily move a number of accounts from one server to another.
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Partitioning a single server to appear as multiple servers has been increasingly common on microcomputers since the launch of VMware ESX Server in 2001. The physical server typically runs a hypervisor which is tasked with creating, releasing, and managing the resources of "guest" operating systems, or virtual machines. These guest operating systems are allocated a share of resources of the physical server, typically in a manner in which the guest is not aware of any other physical resources save for those allocated to it by the hypervisor. As a VPS runs its own copy of its operating system, customers have superuser-level access to that operating system instance, and can install almost any software that runs on the OS; however, due to the number of virtualization clients typically running on a single machine, a VPS generally has limited processor time, RAM, and disk space.[2]
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