A Virtual Private Server (VPS) uses virtualisation software to split up a physical server into multiple independent environments that can run separate tasks.
Each virtual server runs it's own services under its own operating system and is assigned Disk Space, CPU and RAM. Each virtual server runs its own copy of services such as NGINX
(A Better Apache web server
and a MySQL/MariaDB SQL database
. Commonly web hosting services
use VPS to provide hosting for larger websites that use for example WordPress
Running websites on virtual private servers offers better performance over shared web hosting and can give better uptime performance as well as better SEO results.
Previously servers in a data centre
were given dedicated jobs on hardware that often had extra resources such as ram, disk and CPU left over after it runs it's own tasks, and also separate power supplies per machine mean a higher power draw.
An example of this previously would have been a file share server, a mail server, and an account server. With VPS all of these servers can run virtually requiring no separate hardware or wasted hardware resources.
With VPS, you can assign dedicated resources to each virtual server, such as ram, disk and CPU cores. This pool of CPU and memory per machine stops other virtual servers on the host machine are not able to slow your virtual server down. Dedicated resources can be adjusted, and with a few clicks, you can add more disk space, RAM and CPU as needed.
With VPS and cloud hosting, it means that effective services today are divided into several virtual servers that operate independently, each with its own operating system, often split between different networks and data centres.
VPS hosting is usually chosen by website operators who have an average level of traffic that require more resources and faster loading times than traditional shared web hosting
plan but still do not require the resources and expense of dedicated servers.
Upgrading from a shared plan to a virtual private server will improve the speed and performance of your website. Your site will be more responsive because you don't share resources, and your site can be faster and more efficient.
Although separation and intrusion prevention on physical machines on your PC is not a significant problem, VPS hosts have security measures in place to ensure the isolation of its customer's servers.