Virtualization architecture consisting of a thin software layer that runs directly on the hardware intercepting some, or all, operating system calls to hardware. Typically the hypervisor virtualizes CPU and memory while a single priviledged guest is assigned to manage and virtualize network and disk. NUMA on- niform emory ccess systems are essentially SMP computers with multiple memory busses. As the acronym suggests, access to some regions of memory is quicker than to others. Most often each CPU will have a range of memory that is considered local, the operating system must optimize to keep memory for processes close to the CPU that is executing said program. OSS pen ource oftware refers to software that is made available in source code form and is usually free of charge. Not only is source code available but you are free to modify it for your own purposes and (in the case of some licenses) you may even resell OSS without any fees or royalties being owed to software's creator. Examples of OSS licenses are MPL, GPL and BSD. Refer to the Open Source Institute for a better definition.
a loadable kernel module providing a sand boxed wrapper
a slim layer of software running in the layer between the hardware and any OS, abstracting the hardware like memory, processor and devices from the OS
a small scaled down OS that runs on your machine, under it runs other operating systems that are that Xen-aware, thus you can't just run anything, you need Xen kernel support
a specialized type of operating system
the first layer of software installed on a computer system in a bare metal environment, but below other virtualization services such as a virtual machine monitor, that allows multiple, possibly heterogeneous, operating systems to share a single hardware platform. Compare to hosted virtualization.
An alternative term for VMM, used because it means `beyond supervisor', since it is responsible for managing multiple `supervisor' kernels.
A program or a portion of Licensed Internal Code (LIC) that allows multiple instances of operating systems to run simultaneously on the same hardware., , , , , , , , , , , , , , , , , , , X, Y, , Symbols and Numerics Return to Glossary.
In computing, a hypervisor (also: virtual machine monitor) is a virtualization platform that allows multiple operating systems to run on a host computer at the same time. The term usually refers to an implementation using full virtualization.