Are you confused whether you should go for KVM virtual dedicated server or an OpenVZ VPS?
Since this question pops up from time to time, we decided to give our clients a clearer perspective of both the options so that they understand the basic differences between OpenVZ and KVM. Essentially, they are two different ways to offer virtualization. KVM uses full virtualization and OpenVZ uses shared resources. While this is not meant to be an in-depth analysis, it will help you make an informed decision between both the options.
OpenVZ VPS is a container based virtualization of Linux. Virtualization atthe OS level means that all the basic components exist on the machine and are used by all the guests. To Simplify further, all the containers share the same underlying OS but still operate as isolated and secured Linux containers.
Each container performs precisely like a standalone server. The container can be rebooted independently, have IP addresses, users, processes, memory, root access, applications, and configuration files. This allows you to use the resources, but at the same time, puts limitations in terms of the OS.
The most important benefit of OpenVZ VPS is good performance and lesser resources needed for the host. On the other hand, for users, it is available with pre-defined configuration templates that can be conveniently installed with just a few simple clicks.
The downside however, is that it cannot be easy to migrate to other platforms. Only host-loaded kernel modules are available. If you are missing something, it is ultimately up to the provider to add it or not.
KVM Virtual Dedicated server
On the other hand, KVM virtual dedicated server is the full virtualization solution for Linux and contains virtualization extensions for extensions (AMD-V or Intel VT). Using KVM, you can have Windows and Linux virtual machines operating side by side using the same hardware. Each virtual machine has private virtualized hardware- network card, own kernel, graphics adapter etc. As it has its own virtualized hardware, the server will act completely on its own.
As KVM maintains separate instances for each of the virtual servers, it uses more resources compared to OpenVZ servers. The best part about KVM virtual dedicated servers is that they work similar to a dedicated server, giving you the flexibility to migrate from a virtual machine to a dedicated server and offering the usability of its own kernel.
However, all these perks come with a price- the price of additional resources needed for the host, meaning penalty regarding CPU and I/O.
When choosing between the two, you need to assess your needs to make the perfect decision. Need help choosing between OpenVZ servers and KVM virtual dedicated servers? Give us a call to discuss your needs.We can help you make an informed decision in terms of website hosting.