rdiff-backup is reverse differential backup
rdiff-backup backs up one directory to another, possibly over a network. The target directory ends up a copy of the source directory, but extra reverse diffs are stored in a special subdirectory of that target directory, so you can still recover files lost some time ago. The idea is to combine the best features of a mirror and an incremental backup. rdiff-backup also preserves subdirectories, hard links, dev files, permissions, uid/gid ownership (if it is running as root), modification times, acls, eas, resource forks, etc. Finally, rdiff-backup can operate in a bandwidth efficient manner over a pipe, like rsync. Thus you can use rdiff-backup and ssh to securely back a hard drive up to a remote location, and only the differences will be transmitted.
Sol1 has officially taken over stewardship of rdiff-backup from February 2016. Sol1 has long been a contributor and user of rdiff-backup, and will maintain the open source nature of rdiff-backup, while bringing it into the modern era.
The wiki contains documentation on use cases, and serves as a respository of scripts for people to contribute to. These scripts do many things for and around rdiff-backup.
Authors and Contributors
@sol1 is the current maintainer of rdiff-backup.
Project Lead / Maintainer History:
- Edward Ned Harvey, maintainer 2012 to 2016
- Andrew Ferguson, maintainer 2008 to 2012
- Dean Gaudet, maintainer 2006 to 2007
- Ben Escoto, original author, maintainer 2001 to 2005.
Other code contributors are:
- Daniel Hazelbaker, who contributed Mac OS X resource fork support. (July 2003)
- Dean Gaudet, for checking in many patches, and for finding and fixing many bugs.
- Andrew Ferguson, for improving Mac OS X support and fixing many user-reported bugs.
- Josh Nisly, for contributing native Windows support. (June 2008)
- Fred Gansevles, for contributing Windows ACLs support. (July 2008)
Thanks also to:
- The Free Software Foundation, for previously hosting the rdiff-backup project via their Savannah system.
- Andrew Tridgell and Martin Pool for writing rdiff, and also for rsync, which gave Ben Escoto the idea
- Martin Pool and Donovan Baarda for their work on librsync, which rdiff-backup needs.
- Michael Friedlander for initially acting interested in the idea and giving me accounts for testing
- Lots of people on the mailing list for their helpful comments, advice, and patches, particularly Alberto Accomazzi, Donovan Baarda, Jeb Campbell, Greg Freemyer, Jamie Heilman, Marc Dyksterhouse, and Ralph Lehmann.