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A forward incremental-forever backup [10] allows the synthetic operation to create a new full backup, which is limited to the size of the incremental file, instead of the complete size of a full backup file as it would happen in a “forward mode with synthetic fulls”. The overall consumed I/O is the same as the reversed incremental, but ...
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 ...
It is therefore discussed in the "Enterprise client-server backup" article, rather than in the "Backup" article. Some solutions marketed as continuous data protection may only allow restores at fixed intervals such as 15 minutes or one hour or 24 hours, because they automatically take incremental backups at those intervals.
A differential backup saves only the data that has changed since the last full backup. This means a maximum of two backups from the repository are used to restore the data. However, as time from the last full backup (and thus the accumulated changes in data) increases, so does the time to perform the differential backup.
a backup that only contains the files that have changed since the most recent backup (either full or incremental). The advantage of this is quicker backup times, as only changed files need to be saved. The disadvantage is longer recovery times, as the latest full backup, and all incremental backups up to the date of data loss need to be restored.
Yes; Incremental: Yes No Yes No Yes No FlyBack: No ? No git: Yes Yes; snapshot Yes (via git-remote-gcrypt) Yes No No Yes ? ? git-annex: Yes No Partial (with remote block device) Yes No Yes Yes No No luckyBackup: No No No Mondo Rescue: Yes Yes; Incremental: No Yes ? No Redo Backup and Recovery: No No No rdiff-backup: Yes Yes; reverse incremental ...