KVM vs OpenVZ Virtualization
What’s the difference between KVM & OpenVZ? What should I choose?
We get this question a lot! In short virtualization involves breaking down one physical server (“host node”) into smaller virtual private servers. There are various technologies that help do this of which we offer two of them. We take a dive into the advantages/disadvantages between KVM & OpenVZ which should help in making your decision.
KVM – Hardware virtualisation with full control
KVM simulates hardware allowing multiple guest OS to co-operate with the hypervisor (main server – “node”). The major advantage of of a KVM VPS is that it allows you to work with any OS and use the latest (and custom) kernels. It also fully supports SELinux and disk encryption which may be important to you. As a result you can also perform custom installation like you would do on a dedicated server and go through the OSs installation process and perform custom partitioning/encryption. In addition, our OpenVZ plans do not support Docker however due to KVM virtualization our KVM plans can run Docker.
However, on the other hand by default even on a clean install a KVM VPS will generally demand more resources and does not allow hosts to oversell significantly as such these VPSs generally cost more despite this we believe our KVM plans are one of the most competitive and affordable out there!
OpenVZ – User friendly linux containers
OpenVZ is an operating system level virtualization in which the linux kernel is used to split the OS into containers and the kernel itself is shared among the VPSs. As a result it consumes far less resources than a KVM VPS but it is not true virtualisation and you cannot control certain things such as custom/latest kernels, disk encryption or run non-linux operating systems like Windows and our OpenVZ plans do not support docker at this moment of time.
However as a result of the far less resource utilisation and simpler more user friendly setup this is the most cost effective option. If you are looking for a simple, easy to use linux VPS then OpenVZ is definitely the way to go