ACRONIS Backup & Recovery 10 Advanced Server User's Guide download pdf (Page 43)

Combination of rules 1 and 2

You can limit both the backups’ lifetime and the archive size. The diagram below illustrates the

resulting rule.

Example

Delete backups older than = 3 Months

Keep the archive size within = 200GB

Never delete backups younger than = 10 Days

• Every time the retention rules are applied, the program will delete all backups created more than

3 months (or more exactly, 90 days) ago.

• If after the deletion the archive size is more than 200GB, and the oldest backup is older than 10

days, the program will delete that backup.

• Then, if necessary, the next old backup will be deleted, until the archive size decreases to the

preset limit or the oldest backup age reaches 10 days.

Deleting backups with dependencies

Both retention rules presume deleting some backups while retaining the others. What if the archive

contains incremental and differential backups that depend on each other and on the full backups

they are based on? You cannot, say, delete an outdated full backup and keep its incremental

“children”.

When deletion of a backup affects other backups, one of the following rules is applied:

• Retain the backup until all dependent backups become subject to deletion

The outdated backup will be kept until all backups that depend on it also become outdated. Then

all the chain will be deleted at once during the regular cleanup. This mode helps to avoid the

potentially time-consuming consolidation but requires extra space for storing backups whose

deletion is postponed. The archive size and/or the backup age can exceed the values you specify.

• Consolidate the backup

The program will consolidate the backup that is subject to deletion with the next dependent

backup. For example, the retention rules require to delete a full backup but retain the next

incremental one. The backups will be combined into a single full backup which will be dated the

incremental backup date. When an incremental or differential backup from the middle of the

chain is deleted, the resulting backup type will be incremental.

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 403 404

No comments

ACRONIS Backup & Recovery 10 Advanced Server User's Guide Page 43