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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.
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 ...
To avoid downtime, high-availability systems may instead perform the backup on a snapshot—a read-only copy of the data set frozen at a point in time—and allow applications to continue writing to their data. Most snapshot implementations are efficient and can create snapshots in O(1). In other words, the time and I/O needed to create the ...
LSFS – a Log-structured file system with writable snapshots and inline data deduplication created by StarWind Software. Uses DRAM and flash to cache spinning disks. LogFS – intended to replace JFFS2, better scalability. No longer under active development. [15] NILFS – a log-structured file system for Linux with continuous snapshots.
A disk image is a snapshot of a storage device's structure and data typically stored in one or more computer files on another storage device. [1] [2]Traditionally, disk images were bit-by-bit copies of every sector on a hard disk often created for digital forensic purposes, but it is now common to only copy allocated data to reduce storage space.
In traditional file systems, file changes overwrite the original data. With COW, when changes are made, a new version of the file is created while keeping the original intact. This approach enables features like snapshots, which capture the state of a file at a specific time without consuming much additional space. Snapshots typically store ...
.nii – single-file (combined data and meta-data) style.nii.gz – gzip-compressed, used transparently by some software, notably the FMRIB Software Library (FSL).gii – single-file (combined data and meta-data) style; NIfTI offspring for brain surface data.img, .hdr – dual-file (separate data and meta-data, respectively) style
The first version released under the name of Veeam Backup provided backup, replication, file copying, file-level recovery and deduplication for VMware ESX Server environments. [35] 2.0: 2008: Added VSS support, VMware ESXi support, and enhanced VCB (VMware Consolidated Backup) performance. [36] 3.0: 2009