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How rdiff-backup works

Independent backup expert Brien Posey discusses rdiff-backup in this Expert Answer.

What is rdiff-backup and how does it work?

Rdiff-backups are backups based on the rdiff-backup tool. This free tool makes copy backups, but does so in a unique way.

The software initially works by creating a mirror copy of the data to a target storage device. Once the initial copy has been made, only the differences are backed up from that point forward. These differences (diffs) are stored in a dedicated subdirectory. This allows for point-in-time recovery capabilities. The backup works as a mirror copy and an incremental backup in one.

This was last published in March 2013

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