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differential backup

   Also found in: Wikipedia 0.04 sec.

differential backup

See backup types.

differential backup [‚dif·ə‚ren·chəl ′bak‚əp]
(computer science)
Backup of only files that have been changed or added since the last backup.
(operating system)differential backup - A kind of backup that copies all files that have changed since the last full backup. Each differential backup will include all files in previous differential backups since the full backup so to restore a version of a file, you only need to search the full backup and the relevant differential backup.

Some systems support differential backup by associating an "Archive" flag with each file and setting this flag whenever the file is modified to indicate that it should be included in the next backup. A differential backup does not change this flag, whereas an incremental backup resets it.


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For differential backup, the same data that was backed up on the previous differential backup plus any new changes are also backed up on the next differential backup.
Building practical data protection strategies by Moore, Fred / Computer Technology Review
Differential Backup Method: A differential backup copies all those files that have been modified or changed since the last full backup.
The emergence of e-vaulting: electronic vaulting is a compelling ... by Ganong, Ray / Information Management Journal
esxRanger Professional offers full and differential backups with full and file-level restore capabilities without requiring agents to be utilized.
Vizioncore Offers Advice to Help Users Understand VCB for VMware(R) ... by Business Wire
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