backup rotation

backup rotation

(operating system)
Any system for re-using backup media, e.g. magnetic tape. One extreme would be to use the same media for every backup (e.g. copy disk A to disk B), the other extreme would be to use new media every time. The trade-off is between the cost of buying and storing media and the ability to restore any version of any file. One example is the Grandfather, Father, Son (GFS) scheme.
References in periodicals archive ?
A common off-site backup rotation cycle is a week, and this should be the minimum--losing a week of data would hurt most organizations, but would not be devastating.
Rewritable media is best suited for a typical weekly backup rotation cycle.