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2. Snapshot (computer storage) - Wikipedia

   en.wikipedia.org/wiki/Snapshot_(computer_storage)

   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 ...

3. Shadow Copy - Wikipedia

   en.wikipedia.org/wiki/Shadow_Copy

   Shadow Copy. Shadow Copy (also known as Volume Snapshot Service, [1] Volume Shadow Copy Service[2] or VSS[2]) is a technology included in Microsoft Windows that can create backup copies or snapshots of computer files or volumes, even when they are in use. It is implemented as a Windows service called the Volume Shadow Copy service.

4. List of backup software - Wikipedia

   en.wikipedia.org/wiki/List_of_backup_software

   This is a list of notable backup software that performs data backups. Archivers, transfer protocols, and version control systems are often used for backups but only software focused on backup is listed here. See Comparison of backup software for features.

5. Comparison of disk cloning software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_disk_cloning...

   List. Disk cloning capabilities of various software. ^ Sector-by-sector transfer involves accessing the disk directly and copying the contents of each sector, thus accurately reproducing the layout of the source disk. ^ File-based transfer (as opposed to sector-by-sector transfer), involves opening all files and copying their contents, one by ...

6. Versioning file system - Wikipedia

   en.wikipedia.org/wiki/Versioning_file_system

   A versioning file system is any computer file system which allows a computer file to exist in several versions at the same time. Thus it is a form of revision control. Most common versioning file systems keep a number of old copies of the file. Some limit the number of changes per minute or per hour to avoid storing large numbers of trivial ...

7. Comparison of backup software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_backup_software

   Comparison of backup software. Feature comparison of backup software. For a more general comparison see List of backup software.