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Vinchin Blog Full backup, differential backup and incremental backup

Full backup, differential backup and incremental backup

2018-11-19

Generally, there are three types of backup: full backup, differential backup, and incremental backup.
Full backup:
Back up all selected folders and do not rely on the archive properties of the files to determine which files to back up. (during the backup process, any existing marks are cleared, and each file is marked as backed up, in other words, the archive attribute is cleared).

Differential backup:

A differential backup is for a full backup: all files that have changed since the last full backup are backed up. (during a differential backup, only the marked files and folders are backed up. It does not clear the mark, that is, it does not mark as backed up after backup, in other words, it does not clear the archive attribute).
Incremental backup:
Incremental backup is for the last backup (no matter what kind of backup): back up all changed files since the last backup. (during incremental backup, only the marked selected files and folders are backed up. It clears the marks, that is, marks the files after the backup, in other words, clears the archive attribute.)

Vinchin Backup & Recovery supports all three types of backup, and there is the Forever Incremental Backup feature For VMware, Xenserver, RHV/oVirt, Oracle Linux Virtualization Manager, Openstack, etc. By setting forever incremental backup, the backup server will make one full backup for the first time and make incremental backup forever to speed up backup and save your storage space.


Different backup types can have certain combinations. The following examples are for your reference: Full backup and differential backup

Full backup on Monday and differential backup from Tuesday to Friday. If the data is corrupted on Friday, you only need to restore the full Monday backup and the differential backup on Thursday. This strategy takes less time to back up data, but less time to restore data.
Incremental and full backup
Full backup on Monday and incremental backup from Tuesday to Friday. If the data is corrupted on Friday, you need to restore the normal Monday backup and all incremental backups from Tuesday to Friday. This strategy takes less time to back up data, but it takes more time to restore data.

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