Acronis Backup for Linux Server - User Guide - Manual (Page 71)

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4.5.3 Setting up retention of backups
You can set retention rules for backups when creating a backup plan (p. 34). The available retention
rules depend on the chosen backup scheme.
Applying retention rules can be restricted by the Replication/cleanup inactivity time (p. 92) option.
Simple scheme
Each backup is retained until its age exceeds a limit you specify. Then, it is either deleted or moved.
To set up deleting the backups:

In Retention rules, select Delete backups older than…, and then specify the retention period.
To set up moving the backups:

In Retention rules, select Move backups older than…, specify the retention period. Under Where
to replicate/move backups, specify the location.
The retention rules are applied after creating a backup. For the second and next locations, creating a
backup means copying or moving a backup there from the previous location.
Grandfather-Father-Son (GFS) scheme
Backups of each type (daily, weekly, and monthly) are retained for the periods you specify in Keep
backups, and then deleted.
The retention rules are applied after creating a backup. They are applied sequentially in the primary,
the second and all next locations.
Tower of Hanoi scheme
Each backup is retained based on its level (p. 49), and then deleted. You specify the number of levels
in Number of levels.
The retention rules are applied after creating a backup. They are applied sequentially in the primary,
the second and all next locations.
Custom scheme
Each backup is retained until the rules you specify are met. Then, it is either deleted or moved.
To set up deleting the backups:

In Clean up archive, select Using retention rules. In the Retention Rules window (p. 72), specify
the rules and select If the specified conditions are met: Delete the oldest backups.

In Apply retention rules, specify when to apply the rules.
To set up moving the backups:

In Clean up archive, select Using retention rules. In the Retention Rules window (p. 72), specify
the rules and select If the specified conditions are met: Move the oldest backups to another
location. Click OK and then specify the location under Where to replicate/move backups.

In Apply retention rules, specify when to apply the rules.
You can choose to apply the retention rules before creating a backup, after creating a backup, on a
schedule, or combine these options. For the second and next locations, creating a backup means
copying or moving a backup there from the previous location.