Hardware virtualization

virtualizationplatform virtualizationguest operating systemvirtualizedvirtualisationpartial virtualizationsystem virtualizationvirtual hardwarevirtualization technologyComputer virtualization
Hardware virtualization is the virtualization of computers as complete hardware platforms, certain logical abstractions of their componentry, or only the functionality required to run various operating systems.wikipedia
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Hypervisor

hypervisorsvirtual machine monitorhost machine
At its origins, the software that controlled virtualization was called a "control program", but the terms "hypervisor" or "virtual machine monitor" became preferred over time.
The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems.

Virtualization

virtualizedvirtualvirtualisation
Hardware virtualization is the virtualization of computers as complete hardware platforms, certain logical abstractions of their componentry, or only the functionality required to run various operating systems.
Nature of a nested guest virtual machine does not need not be homogeneous with its host virtual machine; for example, application virtualization can be deployed within a virtual machine created by using hardware virtualization.

Temporal isolation among virtual machines

isolate their performance
This issue can be addressed by appropriate installation techniques for temporal isolation among virtual machines.
One of the key advantages of using virtualization in server consolidation, is the possibility to seamlessly "pack" multiple under-utilized systems into a single physical host, thus achieving a better overall utilization of the available hardware resources.

Virtual machine

virtual machinesVMvirtual server
The term "virtualization" was coined in the 1960s to refer to a virtual machine (sometimes called "pseudo machine"), a term which itself dates from the experimental IBM M44/44X system.
This evolved into virtual machines, notably via IBM's research systems: the M44/44X, which used partial virtualization, and the CP-40 and SIMMON, which used full virtualization, and were early examples of hypervisors.

Physical-to-Virtual

physical
Physical-to-Virtual ("P2V" or "p-to-v" ) involves the process of decoupling and migrating a physical server's operating system (OS), applications, and data from that physical server to a virtual-machine guest hosted on a virtualized platform.

Comparison of platform virtualization software

Comparison of platform virtual machineshardware levelplatform hypervisors
The table below compares basic information about platform virtualization hypervisors.

Application virtualization

virtualizationcontainerscontrolled testing
In this context, the term "virtualization" refers to the artifact being encapsulated (application), which is quite different from its meaning in hardware virtualization, where it refers to the artifact being abstracted (physical hardware).

Physicalization

Physicalization, the opposite of virtualization, is a way to place multiple physical machines in a rack unit.

Desktop virtualization

virtual desktop infrastructureVDIDesktop as a Service
Local desktop virtualization implementations run the desktop environment on the client device using hardware virtualization or emulation.

Computer

computerscomputer systemdigital computer
Hardware virtualization is the virtualization of computers as complete hardware platforms, certain logical abstractions of their componentry, or only the functionality required to run various operating systems.

Operating system

operating systemsOScomputer operating system
Hardware virtualization is the virtualization of computers as complete hardware platforms, certain logical abstractions of their componentry, or only the functionality required to run various operating systems.

IBM M44/44X

M44/44X
The term "virtualization" was coined in the 1960s to refer to a virtual machine (sometimes called "pseudo machine"), a term which itself dates from the experimental IBM M44/44X system.

Network interface controller

network cardnetwork interface cardnetwork adapter
Access to physical system resources (such as the network access, display, keyboard, and disk storage) is generally managed at a more restrictive level than the host processor and system-memory.

Hard disk drive

hard drivehard diskhard drives
Access to physical system resources (such as the network access, display, keyboard, and disk storage) is generally managed at a more restrictive level than the host processor and system-memory.

Peripheral

peripheralsperipheral devicecomputer peripheral
Guests are often restricted from accessing specific peripheral devices, or may be limited to a subset of the device's native capabilities, depending on the hardware access policy implemented by the virtualization host.

Disaster recovery

recovery time objectiverecovery point objectiverecovery
A disaster recovery (DR) plan is often considered good practice for a hardware virtualization platform.

Instruction set architecture

instruction setinstructionsinstruction
In full virtualization, the virtual machine simulates enough hardware to allow an unmodified "guest" OS designed for the same instruction set to be run in isolation.

CP-67

This approach was pioneered in 1966 with the IBM CP-40 and CP-67, predecessors of the VM family.

Intel

Intel CorporationIntel Corp.Intel Inside
In 2005 and 2006, Intel and AMD provided additional hardware to support virtualization.

Advanced Micro Devices

AMDATIAdvanced Micro Devices, Inc.
In 2005 and 2006, Intel and AMD provided additional hardware to support virtualization.

Oracle Corporation

OracleOracle Technology NetworkOracle Corp.
Sun Microsystems (now Oracle Corporation) added similar features in their UltraSPARC T-Series processors in 2005.