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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. This is very useful in kernel development and for teaching operating system courses, including running legacy operating systems that do not support modern hardware.
Omnissa Horizon (formerly called VMware Horizon) is a commercial desktop and app virtualization product developed by VMware, Inc for Microsoft Windows, Linux and macOS operating systems. It was first sold under the name VMware VDM , but with the release of version 3.0.0 in 2008 it was changed to "VMware View".
In this way, VMware virtual machines become highly portable between computers, because every host looks nearly identical to the guest. In practice, a system administrator can pause operations on a virtual machine guest, move or copy that guest to another physical computer, and there resume execution exactly at the point of suspension.
VMware VMFS (Virtual Machine File System) is VMware, Inc.'s clustered file system used by the company's flagship server virtualization suite, vSphere. It was developed to store virtual machine disk images, including snapshots. Multiple servers can read/write the same filesystem simultaneously while individual virtual machine files are locked.
Nested virtualization becomes more necessary as widespread operating systems gain built-in hypervisor functionality, which in a virtualized environment can be used only if the surrounding hypervisor supports nested virtualization; for example, Windows 7 is capable of running Windows XP applications inside a built-in virtual machine.
Attempting to suspend a Windows virtual machine with the Sensor Diagnostic Tool running caused the virtual machine to become unresponsive. Using audio conferencing software on a Windows 8 guest operating system caused a severe echo during both video and audio calls. On the Windows 95 guest operating system, the mouse cursor jumped.
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 approach is described as full virtualization of the hardware, and can be implemented using a type 1 or type 2 hypervisor: a type 1 hypervisor runs directly on the hardware, and a type 2 hypervisor runs on another operating system, such as Linux or Windows. Each virtual machine can run any operating system supported by the underlying hardware.