Grandfather, Father, Son

(operating system)(GFS) A backup rotation scheme in which a"grandfather" backup is performed on the first Monday of eachmonth, a "father" backup is performed on every other Mondayand a "son" backup is performed on every other day of theweek. Grandfather tapes are kept for a year, father tapes fora month and son tapes for a week. The exact schedule (andthus the number of tapes required) may vary, as may the choiceof full backup or incremental backup, but the idea is thatit should be possible to restore versions of any file ofdifferent ages: e.g. yesterday's, last week's or last year'sversion.

单词	grandfather, father, son
释义	Grandfather, Father, Son Grandfather, Father, Son (operating system)(GFS) A backup rotation scheme in which a"grandfather" backup is performed on the first Monday of eachmonth, a "father" backup is performed on every other Mondayand a "son" backup is performed on every other day of theweek. Grandfather tapes are kept for a year, father tapes fora month and son tapes for a week. The exact schedule (andthus the number of tapes required) may vary, as may the choiceof full backup or incremental backup, but the idea is thatit should be possible to restore versions of any file ofdifferent ages: e.g. yesterday's, last week's or last year'sversion.
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