Monday, August 17, 2009

Tower of Hanoi backup rotation

Tower of Hanoi backup rotation schedule is based on mathematical puzzle with the same name. Tower of Hanoi rotation schedule can be used both on weekly and monthly basis and allows dividing media sets by generations like Grandfather-Father-Son scheme.

Monday, August 10, 2009

Grandfather Father Son backup rotation

Grandfather Father Son backup rotation scheme also know as GFS is based on using three sets or generations of tapes. Monthly full backup is grandfather, weekly full backup is father and a son set for partial everyday backups. Grandfather tapes are stored off-site while “younger” generations stay in backup rotation.

Wednesday, August 5, 2009

Round Robin

Round Robin is the most simple of backup rotations schemes and allows one week tapes rotation on Friday it is full backup, all other day of a week backups are incremental or differential. This allows to have a base of weekly full backups and to recover information from any day during the week.