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qcow is a file format for disk image files used by QEMU, a hosted virtual machine monitor. [1] It stands for "QEMU Copy On Write" and uses a disk storage optimization strategy that delays allocation of storage until it is actually needed.
The Quick Emulator (QEMU) [3] is a free and open-source emulator that uses dynamic binary translation to emulate a computer's processor; that is, it translates the emulated binary codes to an equivalent binary format which is executed by the machine.
This is a list of file formats used by computers, ... .qcow – QEMU copy-on-write.qcow2 – QEMU copy-on-write – version 2.qed – QEMU enhanced disk format;
QEMU uses the .img file extension for raw images of hard drive disks, calling the format simply "raw". CloneCD stores optical disc images in .img files and generates additional CloneCD Control Files (with .ccd extension) for each image to hold the necessary metadata .
Fast Virtual Disk (better known as FVD) is a virtualization-oriented disk image file format developed by IBM for the QEMU virtualization platform. It differs from existing paravirtualization-centric virtual disk image formats through a design that emphasizes lack of contention and separation of concerns between the host and guest kernels through deduplication of filesystem and block layer ...
Open Virtualization Format (OVF) is an open standard for packaging and distributing virtual appliances or, more generally, software to be run in virtual machines. The standard describes an "open, secure, portable, efficient and extensible format for the packaging and distribution of software to be run in virtual machines ".
VMDK (short for Virtual Machine Disk) is a file format that describes containers for virtual hard disk drives to be used in virtual machines like VMware Workstation or VirtualBox. Initially developed by VMware for its proprietary [ 1 ] virtual appliance products, VMDK became an open format [ 2 ] with revision 5.0 in 2011, and is one of the disk ...
GNOME Boxes was initially introduced as beta software in GNOME 3.3 (development branch for 3.4) as of Dec 2011, [5] and as a preview release in GNOME 3.4. [6] Its primary functions were as a virtual machine manager, remote desktop client (over VNC), and remote filesystem browser, utilizing the libvirt, libvirt-glib, and libosinfo technologies. [7]