
62 Copyright © Acronis, Inc., 2000-2011
Note that when the check box is selected, the Store no more than [n] recent versions check box will
change to Store no more than 1+[n] recent versions.
Automatic version consolidation
Automatic consolidation of a backup is enabled by setting the overall limitations for the backup.
These limitations include:
a maximum number of backup versions
a maximum storage period for the backup files
a maximum backup size
Automatic backup version consolidation is available only for the incremental and differential methods of the
custom backup version scheme.
By default there are no limits set and automatic consolidation is not performed. To enable automatic
consolidation, you must select at least one of the limits and either leave its default value or change it
according to your needs.
If limits are set, then after creating a backup version the program checks the backup for quota
violations, such as exceeding a pre-set maximum number of gigabytes set aside for backup versions
and, if any limitation is exceeded, consolidates the oldest backup versions. For example, if you've
pre-set your backup to store 50GB of backup files and your backup versions reach 55GB, you have
exceeded a quota and the system will respond automatically based on rules that you've already set.
This operation creates a temporary file and thus requires disk space. Consider also that the quota
must be violated so that the program can detect the violation. Therefore, to be able to consolidate
the files, the program needs some space on the disk in excess of the backup quota. The extra amount
of space can be estimated as the size of the largest backup version in the backup.
In case of setting a limit on the number of backup versions, the actual number of versions can exceed
the maximum number of versions by one. This enables the program to detect quota violation and
start consolidation. Similarly, if you pre-set a backup version storage period, for example, 30 days,
the program will start consolidation when the oldest backup version is stored for 31 days.
Examples of custom schemes
1. File backup “Daily incremental version + weekly full version”
Case: You have files and/or folders you work with every day. You need to save your daily work results
and want to be able to recover data state to any date for the last three weeks. Let’s see how you can
do this using a custom backup scheme.
1. On the main screen, click File backup.
2. In the File Backup window select files and/or folders you want to back up, and specify the backup
destination. For more information see Backing up files and folders (p. 43).
3. Click Turn on for the Schedule item. In the Scheduler window click Daily, and specify a start time
for the backup operation. For example, if you finish your everyday work at 8 PM, specify this time
or a little later (8.05 PM) as the start time.
4. Click Version chain near the Backup scheme item (Version chain is the default backup scheme).
5. In the File Backup Options window, make sure that the Backup scheme tab is selected.
6. Choose Custom scheme instead of Version chain scheme.
7. In the Backup method box, select Incremental from the drop down list.
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