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KVM vs OpenVZ

"Which virtualisation is better, KVM or OpenVZ?" A common question when looking to buy a Virtual Server.

While there are many options, such as Hyper-V, Xen, VMware, we'll be comparing KVM vs OpenVZ.

The main difference between OpenVZ and KVM is that OpenVZ can only support Linux operating systems, while KVM is much more flexible and can support Linux, Windows, and custom OS options.

OpenVZ is container-based virtualization for Linux. OS level virtualization means many basic components exist once on the machine and are used by all guests (like the identical kernel). Each container performs and executes exactly like a stand-alone server; a container can be rebooted independently and have root access, users, IP addresses, memory, processes, files, applications, system libraries, and configuration files. This way you use the resources more efficiently.

Benefits of OpenVZ: - Very fast as it uses less system resources - Easy to get setup and easy to maintain

Limitations of Openvz: - Less customisation, all containers share the same architecture and kernel version - Only runs Linux operating systems

Kernel-based Virtual Machine (KVM) is a virtualization module in the Linux kernel that allows the kernel to function as a hypervisor.

Benefits of KVM: - Can run Linux, Windows and other operating systems - Isolated environment - Own kernel

Last updated: 2022-02-20

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