- OpenVZ is a virtualization technology where the container (VPS) relies on the host node's kernel. OpenVZ uses a single patched Linux kernel and therefore can run only Linux, all containers share the same architecture and kernel version. However, as it does not have the overhead of a true hypervisor, it is very fast and efficient. We use OpenVZ 7 on all our nodes.
- KVM (Kernel-based Virtual Machine) is full virtualization and practically any OS that can be installed from an ISO is supported, every guest (VPS) has its own kernel and no restrictions in terms of functionality; Using KVM, one can run multiple virtual machines running unmodified Linux or Windows images. Each virtual machine has private virtualized hardware: a network card, disk, graphics adapter, etc.
