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.

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