Backup Software / Features / Differential Backup
Differential backup technology employed in Handy Backup greatly reduces time and storage space required for backups by saving only changes, on byte level. Handy Backup saves your money by saving only the least modifications of documents, e-mails, disk images or databases.
Version 8.2.0, built on 30 September 2020 110 MB
Differential backup is a process of backing up only those files that were created or changed since the last full backup.
For example, if you make full backup on Sunday and then perform daily differential backups, then Friday’s differential will contain all data that appeared or changed for the whole work week.
It is the most convenient way to copy some data that changed to often, such as making database backup or saving virtual machine content. Compared with incremental backup, differential copying makes recovery much quicker, and it allows saving much more storage space for such tasks than full backup.
This backup method starts with full data backup, and then continues with making some differential backups until reaching a preset time or quantity of partial backups, starting with a new full backup. After reaching a preset length of chain, all operations will repeat, starting from full backup again.
The principal advantage of mixed differential backup is its ability to refresh full copies of a dataset automatically, removing too old differences between the modern state of a whole dataset and a last differential copy.
The main logical application of this technique is emulating or realizing some complex backup strategies such as Grandfather-Father-Son or Tower of Hanoi, where a user can schedule the mixed differential backup as “lower” parts of these strategies to make small, daily data copies and regular refresh.
The difference between differential and incremental backup is that an amount of data to save is calculated from last full backup, rather than from previous partial backup.
For example, if you repeat two incremental backups without changing any files, the second backup will contain nothing, while two consequent differential backups will be identical.
Handy Backup supports both differential and incremental backup technologies.
This is easy! Just select either “Differential” or “Mixed differential” backup type on the Step 4 of a new task wizard.
Note: For mixed differential backup, you must also set up a length of differential backup chain in the versions dialog! Also, you must work in advanced task wizard mode to access the mixed differential backup technique.
Version 8.2.0, built on 30 September 2020. 110 MBBackup Software from Novosoft LLC. 39 USD per license.
The affordable, easy-to-use utility for one PC fully supports differential, incremental and mixed backup!
Another advantage of making differential backups is quick data recovery. Unlike incremental backups which need to go through the entire chain from the last to the first backup, restoration of differential backups is done in just two steps, using the most recent full and differential backup.
Let’s imagine some real-life examples how the technology of differential backups works in different situations:
To learn more about Handy Backup, please see the full list of backup features of our software.
Download Handy Backup and try the power of differential backups!
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