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A synthetic backup is an alternative method of creating full backups. Instead of reading and backing up data directly from the disk, it will synthesize the data from the previous full backup (either a regular full backup for the first backup, or the previous synthetic full backup) and the periodic incremental backups.
In some situations, continuous data protection requires less space on backup media (usually disk) than traditional backup. Most continuous data protection solutions save byte or block-level differences rather than file-level differences. This means that if one byte of a 100 GB file is modified, only the changed byte or block is backed up.
A reverse incremental backup method starts with a non-image full backup. After the full backup is performed, the system periodically synchronizes the full backup with the live copy, while storing the data necessary to reconstruct older versions. This can either be done using hard links—as Apple Time Machine does, or using binary diffs.
Site-to-site backup. backup, over the internet, to an offsite location under the user's control. Similar to remote backup except that the owner of the data maintains control of the storage location. Synthetic backup. a restorable backup image that is synthesized on the backup server from a previous full backup and all the incremental backups ...
Backup solutions generally support differential backups and incremental backups in addition to full backups, so only material that is newer or changed compared to the backed up data is actually backed up. The effect of these is to increase significantly the speed of the backup process over slow networks while decreasing space requirements.
A differential backup is a type of data backup that preserves data, saving only the difference in the data since the last full backup.The rationale in this is that, since changes to data are generally few compared to the entire amount of data in the data repository, the amount of time required to complete the backup will be smaller than if a full backup was performed every time that the ...
Full: Creates a new backup archive every time and backs up everything specified by the user. Differential: Backups only backup the changes made since the latest full backup. Incremental: Only backs up the changes made since the last incremental backup. Incremental backups are a chain and loss of any one of the incremental backups renders the ...
Backup types Areca could handle the following types of backups: Full Backup: When a full backup is performed, ALL files are stored in your archive (whether they have been modified or not). Incremental backup: When an incremental backup is performed, only the files which have been modified since the last backup are stored in your archive.