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2. Virtual machine - Wikipedia

   en.wikipedia.org/wiki/Virtual_machine

   In computing, a virtual machine (VM) is the virtualization or emulation of a computer system. Virtual machines are based on computer architectures and provide the functionality of a physical computer.

3. VMware VMFS - Wikipedia

   en.wikipedia.org/wiki/VMware_VMFS

   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.

4. VMDK - Wikipedia

   en.wikipedia.org/wiki/VMDK

   A flat image allocates space ahead of time while a sparse image grows as the virtual machine writes to it. Flat images can use the underlying file system's sparse file capability, as is done with the vmfs format on ESXi. An image can also refer to a parent image and only store changes made in a copy-on-write fashion. This enables creating a ...

5. VirtualBox - Wikipedia

   en.wikipedia.org/wiki/VirtualBox

   Resizing of disk image formats from Oracle, VDI (VirtualBox disk image), and Microsoft, VHD (Virtual PC hard disk) 4.1 Jul 19, 2011: Windows Aero support (experimental) Virtual machine cloning; 4.2 Sep 13, 2012: Virtual machine groups – allows management of a group of virtual machines as a single unit (power them on or off, take snapshots, etc.)

6. Virtual appliance - Wikipedia

   en.wikipedia.org/wiki/Virtual_appliance

   A virtual appliance is a pre-configured virtual machine image, ready to run on a hypervisor; virtual appliances are a subset of the broader class of software appliances. Installation of a software appliance on a virtual machine and packaging that into an image creates a virtual appliance.

7. VHD (file format) - Wikipedia

   en.wikipedia.org/wiki/VHD_(file_format)

   The virtual machine additions in older VPC versions and the virtual machine integration features in Windows Virtual PC contain precompact ISO images for the first step in supported guest systems. [13] Third-party products also use VHD file format. Oracle VirtualBox, part of Sun xVM line of Sun Microsystems supports VHD in versions 2 and later.

8. Amazon Machine Image - Wikipedia

   en.wikipedia.org/wiki/Amazon_Machine_Image

   An Amazon Machine Image (AMI) is a special type of virtual appliance that is used to create a virtual machine within the Amazon Elastic Compute Cloud ("EC2"). It serves as the basic unit of deployment for services delivered using EC2.

9. Virtual disk and virtual drive - Wikipedia

   en.wikipedia.org/wiki/Virtual_disk_and_virtual_drive

   Virtual disk and virtual drive are software components that emulate an actual disk storage device.. Virtual disks and virtual drives are common components of virtual machines in hardware virtualization, but they are also widely used for various purposes unrelated to virtualization, such as for the creation of logical disks,software development, testing environments, and data management.