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An OVF package always contains exactly one OVF descriptor (a file with extension .ovf). The OVF descriptor is an XML file which describes the packaged virtual machine; it contains the metadata for the OVF package, such as name, hardware requirements, references to the other files in the OVF package and human-readable descriptions.
Virtual appliances are provided to the user or customer as files, via either electronic downloads or physical distribution. The file format most commonly used is the Open Virtualization Format (OVF). It may also be distributed as Open Virtual Appliance (OVA), the .ova file format is interchangeable with .ovf.
Virtual appliances distributed as virtual machine types such as: Open Virtualization Format (OVA) - As of v14.0 was the default VM format. It supports VirtualBox and most VMware products (e.g. Workstation, Player, Fusion and vSphere/ESX). Also includes open-vmtools (for VMware).
.log – Virtual Machine Logfile.vmdk, .dsk – Virtual Machine Disk.nvram – Virtual Machine BIOS.vmem – Virtual Machine paging file.vmsd – Virtual Machine snapshot metadata.vmsn – Virtual Machine snapshot.vmss, .std – Virtual Machine suspended state.vmtm – Virtual Machine team data.vmx, .cfg – Virtual Machine configuration
Vagrant is a source-available software product for building and maintaining portable virtual software development environments; [5] e.g., for VirtualBox, KVM, Hyper-V, Docker containers, VMware, Parallels, and AWS. It tries to simplify the software configuration management of virtualization in order to increase development productivity.
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.
A new VM storage scheme where all VM data is stored in one single folder to improve VM portability; Several UI enhancements including a new look with VM preview and scale mode; On 32-bit hosts, VMs can each use more than 1.5 GB of RAM; In addition to OVF, the single file OVA format is supported; CPU use and I/O bandwidth can be limited per VM
The VMDK format includes multiple differing subformats, some of which store metadata in an external descriptor file, while others embed it with the main data in a single file. [7] A flat image allocates space ahead of time while a sparse image grows as the virtual machine writes to it.