Berikut adaalah informasi sekilas mengenai Perbandingan KVM, XEN, OPENVZ
Info dari linux-kvm.org: “KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.
| OpenVZ | XEN | KVM | |
| Dedicated filesystem of your choice (with direct block level access) | – | + | + |
| Dedicated RAM with full access and debugging capabilities | – | + | + |
| Dedicated server like isolation | – | + | + |
| VNC connection from the very early boot stage | – | Limited Support | + |
| PPTP VPN | Limited Support | + | + |
| Open VPN | Limited Support | + | + |
| IPSec VPN | – | Limited Support | + |
| Firewall Configuration | Limited Support | + | + |
| Kernel mode NFS Server | – | – | + |
| Independent kernel | – | Limited Support | + |
| Independent kernel modules | – | Limited Support | + |
| Full control on sockets and processes | – | – | + |
| Full guest OS support (Windows, Linux, BSD, OpenSolaris, etc.) | – | Limited Support | + |
| Direct dedicated access to PCI / PCIe cards | – | Limited Support | + |
| Fine grained swap configuration per VPS | – | Limited Support | + |
| Official integration with the Linux kernel | – | + | + |
Main features of KVM VPS are:
- KVM virtualization technology offers VNC support that gives you full, physical-like access to the console of your VPS.
- RAM and disk are not shared with other virtual machines on the main server. This makes your KVM VPS even more stable and excludes a possibility of overselling.
- KVM VPS allows you to choose custom kernels as well as custom kernel modules for your KVM VPS guest OS.
- You may set up a VPN server in KVM VPS (PPTP, OpenVPN, IPSec).
- Full guest OS support. Allows you to install Windows, Linux, BSD, OpenSolaris, etc.
- With KVM VPS you may run a Window manger such as Gnome or KDE and and interact with it using VNC.