Virtualization allows your enterprise to reduce IT costs and increase the efficiency of their infrastructure by maximising server usage. Virtualization refers to the creation of a virtual machine that acts like a real computer with an operating system. Software executed on these virtual machines is separated from the underlying hardware resources. For example, a computer that is running Microsoft Windows may host a virtual machine that looks like a computer with Linux operating system.
Ideal for hosting
Virtuozzo is an operating system virtualization solution that allows you to manage your entire virtual infrastructure in a few clicks. You can manage all your virtual servers using a powerful web-interface.
Promox is an operating system virtualization solution "bare metal". The term "bare metal" (metal strip) means that you start with an empty server and therefore there is no need to install an operating system before.
Ideal for applications and development projects
Xen is a robust, secure, high performance type 1 baremetal hypervisor, or a virtual machine monitor (VMM). Xen can securely execute multiple virtual machines, each running its own OS, on a single physical system with close-to-native performance. Xen is open source, and it's used as the core virtualization engine for many vendors products. It supports a wide range of guest operating systems including Windows®, Linux®, Solaris®, and various versions of the BSD operating systems.
Microsoft Hyper-V 2008 is a stand-alone product that provides a reliable and optimized virtualization solution enabling organizations to improve server utilization and reduce costs. Since Hyper-V Server is a dedicated stand-alone product, which contains only the Windows Hypervisor, Windows Server driver model and virtualization components, it provides a small footprint and minimal overhead.
VMWare desktop software runs on Microsoft Windows, Linux, and Mac OS X, while VMware's enterprise software hypervisors for servers, VMware ESX and VMware ESXi are bare-metal embedded Hypervisors that run directly on server hardware without requiring an additional underlying operating system.