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For example, a typical server runs at 425 W [6] and VMware estimates a hardware reduction ratio of up to 15:1. [7] A virtual machine (VM) can be more easily controlled and inspected from a remote site than a physical machine, and the configuration of a VM is more flexible.
A virtual appliance is a virtual machine image designed to run on a specific virtualization platform, while a software appliance is often packaged in more generally applicable image format (e.g., Live CD) that supports installations to physical machines and multiple types of virtual machines. [4] [5] [6]
The words host and guest are used to distinguish the software that runs on the physical machine from the software that runs on the virtual machine. The software or firmware that creates a virtual machine on the host hardware is called a hypervisor or virtual machine monitor. [2] Hardware virtualization is not the same as hardware emulation ...
This type of VM has become popular with the Java programming language, which is implemented using the Java virtual machine. Other examples include the Parrot virtual machine and the .NET Framework, which runs on a VM called the Common Language Runtime. All of them can serve as an abstraction layer for any computer language. [citation needed]
Quest vConverter is an example of a fully automated migration tool for P2V. System Center Virtual Machine Manager SCVMM among many other capabilities has P2V capability. Leostream is an example of a fully automated migration tool for P2V. PlateSpin Migrate is an example of a fully automated migration tool for P2V (and V2P, V2V or P2P).
Platform virtualization software, specifically emulators and hypervisors, are software packages that emulate the whole physical computer machine, often providing multiple virtual machines on one physical platform. The table below compares basic information about platform virtualization hypervisors.
VM-aware storage has some similarities to and can benefit from software-defined networking, but is distinct in that the latter provides general purpose physical equipment that can be customized and configured in software whereas VM-aware storage is designed for virtual machines. [2] [3]
HTTP 1.1's ability for virtual hosting also made it easy to co-host many web sites on the same server. From around 2000, or 2005 in commercially practical terms, interest grew in the use of virtual servers and then cloud hosting, where infrastructure as a service made the computing service the fungible commodity, rather than the server hardware.