Which backup rotation scheme retains multiple generations of data by keeping daily ("son"), weekly ("father"), and monthly ("grandfather") backup sets?
First-In, First-Out (FIFO) rotation
3-2-1 backup rule
Tower of Hanoi rotation
Grandfather-Father-Son (GFS)
The Grandfather-Father-Son (GFS) scheme organizes backups into three tiers: daily "sons" provide short-term recovery points, weekly "fathers" extend retention for medium-term needs, and monthly "grandfathers" preserve long-term archives. This hierarchy balances restore flexibility with media usage, unlike schemes such as Tower of Hanoi (recursive schedule), FIFO (simple rolling overwrite), or the 3-2-1 rule (a storage-location guideline rather than a rotation schedule).
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