ACRONIS BACKUP AND RECOVERY 10 SERVER FOR LINUX - UPDATE 3 User Manual page 116

6.2.10.4 Grandfather-Father-Son scheme
At a glance
 Daily incremental, weekly differential, and monthly full backups

Custom day for weekly and monthly backups

Custom retention periods for backups of each type
Description
Let us suppose that we want to set up a backup plan that will regularly produce a series of daily (D),
weekly (W), and monthly (M) backups. Here is a natural way to do this: the following table shows a
sample two-month period for such a plan.
Jan 1—Jan 7
Jan 8—Jan 14
Jan 15—Jan 21
Jan 22—Jan 28
Jan 29—Feb 4
Feb 5—Feb 11
Feb 12—Feb 18
Feb 19—Feb 25
Feb 26—Mar 4
Daily backups run every workday except Friday, which is left for weekly and monthly backups.
Monthly backups run every fourth Friday, and weekly backups run on all other Fridays.
 Monthly ("Grandfather") backups are full;
 Weekly ("Father") backups are differential;

Daily ("Son") backups are incremental.
Parameters
You can set up the following parameters of a Grandfather-Father-Son (GFS) scheme.
Start backup at:
Back up on:
Weekly/Monthly:
116
Mo Tu We Th
D D D D
D D D D
D D D D
D D D D
D D D D
D D D D
D D D D
D D D D
D D D D
Specifies when to start a backup. The default value is 12:00 PM.
Specifies the days on which to perform a backup. The default value is Workdays.
Specifies which of the days selected in the Back up on field you want to reserve
for weekly and monthly backups. A monthly backup will be performed every
fourth such day. The default value is Friday.
Fr Sa Su
W - -
W - -
W - -
M - -
W - -
W - -
W - -
M - -
W - -
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