Choosing the right VPS server is the foundation of everything. If you select the wrong technology or an unsuitable combination of parameters, your project may become unusable.
Technology:
OpenVZ - Basic container virtualization suitable for non-demanding projects. This technology is not suitable for a large number of CPU-intensive processes. It is also not suitable for Proxy and VPN servers. It is ideal for hosting websites with specific server settings. With higher configurations, OpenVZ VPS servers can also run game servers and TS3 servers. Technically, it is possible to run almost everything on OpenVZ that can be run on a standard Linux server, except for applications that directly access the hardware. The overhead of OpenVZ technology is in the tens of percent.
KVM - Full hardware virtualization suitable for more demanding and intensive projects. The virtualized operating system does not require any modifications. The user has full access to the virtual hardware and can modify the kernel, load modules, etc. KVM virtualization is known for its great stability, security, and high performance. The overhead of KVM technology is in the single digits percentage-wise. It is not a problem to run virtual servers with a large amount of system resources.
- Choose a KVM server if you require guaranteed performance.
- Choose an OpenVZ server if you are looking for a cost-effective solution.
Parameters:
As described above, the best price-to-performance ratio is achieved with a KVM VPS server, where the server overhead is in the single digits. We run KVM VPS servers in our Cloud, providing even greater availability and stability.
Stability:
Most applications have specified server parameters under which they will function optimally. These parameters might theoretically be sufficient for you, but situations can arise where:
- An indexing robot starts mass indexing all web pages of your site/application.
- A bot attempts to break into the application.
- There is a situation where the server suddenly needs more performance (e.g., Christmas, backups, cron jobs).
- An application error increases the server load.
...therefore, it is always necessary to choose server performance parameters with a larger reserve.