Data Backup Types
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Types of data backup are integral for choosing the right backup strategy. After you have determined what to back up and what backup storage media fits the best, you need to decide how the files will be processed. The main things to think about here are the method of backup and compression options.
Any file backup software provides at least one method of saving data, full backup, for copying a complete dataset to a last bit. However, other data backup types also exist, often for saving time and space for regular backup. These backup types are:
The full backup is a basis for any differential backup or incremental backups, as well as for mixed backup. Let us demonstrate all different types of data backup techniques.
Full backup assumes that each time you execute the task, the entire set of data is copied to the chosen place. Full backup takes much space, time and PC resources, and often makes many redundant data copies, as most data in the dataset bear no changes between backups.
Note: For some types of data, e.g. when you create a complete disk image backup, full backup is the only effective option.
Incremental backup processes only files that appeared or changed since the previous incremental backup. After a first full backup, any next backup will be incremental, saving only a difference between current dataset and a previous incremental copy.
Example: If you created a task for backing up My Documents folder and do an incremental backup immediately after a full backup, then the task will copy no file. However, if you modify some files and then run an incremental backup, the task will copy only these modified files in your dataset.
Differential backup is very much like incremental backup but utilizes a different types for data backup method. After a first full backup, any next backup will be incremental, saving only a difference between current dataset and a previous incremental copy.
Example: Make a database backup task with differential backup. Let us assume that there are 100 tables in a database, and one table will change per minute. After 10 minutes of task execution we will have a full copy of an entire database and a differential copy containing only those 10 tables that was changed.
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This approach is a combination of the two different types of backup: full and partial backup (either incremental or differential). It also resembles a versioned backup technique. By this method, a full backup takes place, followed by some fixed quantity of partial backups.
Note: For these types of backup in data warehouse, a chain length can be either a count for partial backups, or a time interval to repeat an entire cycle from starting point. After finishing a cycle by reaching a preset endpoint, a new cycle will start. To use a procedure of mixed backup, you must work in an Advanced Task Wizard mode.
It is a combination of full backup and a couple of subsequent incremental backups, which will continue until finishing a preset length of a mixed backup chain. After a first full backup, any next backup will be incremental, saving only a difference between current dataset and a previous incremental copy.
Where to use: The mixed incremental type of backup will be efficient for such tasks as backing up projects, user folders. Windows libraries and shared resources, where frequent changes neighbor with an occasional need to restore a particular previous data version.
It is a sequence of full backup and a multiple subsequent differential backups that will continue until reaching a preset length of a mixed backup chain. After a first full backup, any next backup will be differential, saving only a difference between current dataset and a previous full copy.
Where to use: The mixed differential type of backup can work especially effective to the databases and dynamic website content, where stability and regularity are most important attributes of perfect backup. It is also an efficient part of different strategies such as Grandfather-Father-Son backup.
Since data backup sare not meant to be used as separate documents, it seems reasonable to enable automatic compression, in order to save storage space and transferring time (may be important if you back up online, or back up to FTP locations).
Note: You may compress your files as a whole, or zip each file separately. The first method often saves more space, as the second is less time-consuming and significantly faster.
After choosing a backup type, it is important to choose how often the task will be performed, and specify a backup schedule.
Handy Backup supports and manages all types of data backup described in this article, as well as many other great features and options, providing a total automation of your backup strategy for any data existed!
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