Bup

Bup is a Backup system written in Python. It uses several formats from Git but is capable of handling very large files like operating system images. It has block-based deduplication and optional par2-based error correction.

History
Bup development began in 2010 and was accepted to Debian the same year.

Design
Bup uses the git packfile format writing packfiles directly, avoiding garbage collection.

Availability
Bup is available from source and notably part of the following distributions
 * Debian
 * Ubuntu
 * Arch Linux
 * pkgsrc (NetBSD etc.)