Acronis Backup for Windows Server - User Guide - Manual (Page 47)

47 Copyright © Acronis International GmbH, 2002-2014

Monthly: indefinitely
Backup is thus performed only on Fridays. This makes Friday the only choice for weekly and monthly
backups, leaving no other date for daily backups. The resulting “Grandfather-Father” archive will
hence consist only of weekly differential and monthly full backups.
Even though it is possible to use GFS to create such an archive, the Custom scheme is more flexible in
this situation.
4.2.6.3 Custom backup scheme
At a glance

Custom schedule and conditions for backups of each type

Custom schedule and retention rules
Parameters
Parameter Meaning
Full backup schedule Specifies on what schedule and under which conditions to perform a full backup.
For example, the full backup can be set up to run every Sunday at 1:00 AM as
soon as all users are logged off.
Incremental backup
schedule Specifies on what schedule and under which conditions to perform an
incremental backup.
If the archive contains no backups at the time of the task run, a full backup is
created instead of the incremental backup.
Differential backup schedule Specifies on what schedule and under which conditions to perform a differential
backup.
If the archive contains no full backups at the time of the task run, a full backup is
created instead of the differential backup.
Clean up archive Specifies how to get rid of old backups: either to apply retention rules (p. 75)
regularly or clean up the archive during a backup when the destination location
runs out of space.
By default, the retention rules are not specified, which means older backups will
not be deleted automatically.
Using retention rules
Specify the retention rules and when to apply them.
This setting is recommended for backup destinations such as shared folders.
When there is insufficient space while backing up
The archive will be cleaned up only during backup and only if there is not enough
space to create a new backup. In this case, the software will act as follows:

Delete the oldest full backup with all dependent incremental/differential
backups

If there is only one full backup left and a full backup is in progress, then
delete the last full backup with all dependent incremental/differential
backups

If there is only one full backup left, and an incremental or differential backup
is in progress, an error occurs saying there is a lack of available space
This setting is recommended when backing up to a USB drive or Acronis Secure