Quote:
Originally Posted by BetterRed
Basically copy everything since last full copy.
Because its faster than multi-day roll forward restores, it was (is) used on big-iron mission-critical datasets where restores must be done by 'yesterday'. Not sure if it's used much these days.
2.2 Differential - WikiPedia
BR |
Incremental/differential also take up quite a bit less disk space than full backups, only having to copy the changed files. Probably not such a big factor for those big-iron mission-critical datasets though, though I think tape backups are still in use some places due to the sheer capacity of it.