ACRONIS Backup & Recovery 10 Advanced Workstation Podręcznik Użytkownika Pobierz pdf (Strona 342)

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A new level 3 differential backup has not yet been created, so the backup of day five is still stored.

Since it depends on the full backup of day one, that backup is available as well. This enables us to go

as far back as 11 days, which is the best-case scenario.

The following day, however, a new third-level differential backup is created, and the old full backup is

deleted.

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This gives us only a four day recovery interval, which turns out to be the worst-case scenario.

On day 14, the interval is five days. It increases on subsequent days before decreasing again, and so

on.

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The roll-back period shows how many days we are guaranteed to have even in the worst case. For a

four-level scheme, it is four days.

Custom backup scheme

At a glance

 Custom schedule and conditions for backups of each type

 Custom schedule and retention rules

Parameters

Parameter Mea ni ng

Full backup 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 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 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 rul es (p. 37)

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 d eleted automati call y.

Using retention rules

Specify the retention rules and when to apply them.

This setting is recommended for backup destinations such as shared folders or

centrali zed va ults .

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ACRONIS Backup & Recovery 10 Advanced Workstation Podręcznik Użytkownika Strona 342