Virtual Private Servers, or VPS, are a platform for web hosting. Hosting takes place on a physical server that has been partitioned into smaller servers, or, virtual servers. Users purchase space on a hosted computer so they can run their websites and server applications. Each server operates independent of hardware and has their own file system, operating system, and software such as MySQL. A VPS is also referred to as a Virtual machine because it functions the same as a real machine, but, through the use of software. A VPS occupies a determined amount of disc space on a host computer, and uses an allocated amount of the host’s CPU power, RAM, and bandwidth. Even though VPS share the same computer, they can reboot without interfering with other servers.
A VPS is also called an Isolated Environment for independently hosting website applications and services. The advantage of this independence is the security. A VPS does not share TCP/IP stacks and it has a separate IP address. This increased independence means the server is not effected by the downtime or hacking attempts of other servers on the system. It is also easier for users to backup and restore their data on a private server. Depending on the software used in the system, a novice can back up information with a web-based interface without technical support.
After a host computer is partitioned, it acts as a hypervisor to create, release, and manage resources of the guest’s, or, VPS’s operating system. There are three types of virtualized environments for VPS to run. In a full virtualized environment, the hypervisor translates, maps, and converts task into resource request for the guest. In a paravirtualized environment, the hypervisor has accessibility control and the allocated resources so the guest can communicate with the host natively. The hybrid and partial paravirtualization are full visualizations where the guest uses the host’s drivers for networking and I/O performances. This system is a good choice for operating systems that can not support full paravirtualizations.
A VPS can give the developer or website owner more security and functionality without the high price of a dedicated server. And, users will find it more reliable in performance compared to a shared server.
