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Copyright © Acronis, Inc., 2000-2010
Mo
Tu
We
Th
Fr
Sa
Su
Jan 1—Jan 7
D
D
D
D
W
-
-
Jan 8—Jan 14
D
D
D
D
W
-
-
Jan 15—Jan 21
D
D
D
D
W
-
-
Jan 22—Jan 28
D
D
D
D
M
-
-
Jan 29—Feb 4
D
D
D
D
W
-
-
Feb 5—Feb 11
D
D
D
D
W
-
-
Feb 12—Feb 18
D
D
D
D
W
-
-
Feb 19—Feb 25
D
D
D
D
M
-
-
Feb 26—Mar 4
D
D
D
D
W
-
-
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:
Specifies when to start a backup. The default value is 12:00 PM.
Back up on:
Specifies the days on which to perform a backup. The default value is
Workdays.
Weekly/Monthly:
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.
Keep backups:
Specifies how long you want the backups to be stored in the archive. A
term can be set in hours, days, weeks, months, or years. For monthly
backups, you can also select
Keep indefinitely
if you want them to be
saved forever.
The default values for each backup type are as follows.
Daily: 7 days (recommended minimum)
Weekly: 4 weeks
Monthly: indefinitely
The retention period for weekly backups must exceed that for daily
backups; the monthly backups' retention period must be greater than
the weekly backups' retention period.
We recommend setting a retention period of at least one week for daily
backups.