Developed by Junjiro Okajima in 2006, aufs is a complete rewrite of the earlier Unionfs. It aimed to improve reliability and performance, but also introduced some new concepts, like writable branch balancing, and other improvements - some of which are now implemented in the Unionfs 2.x branch.
Several Linux distributions have chosen aufs as a replacement for Unionfs, including:
- Knoppix live CD Linux distribution - since the end of 2006, "for better stability and performance"
- NimbleX since version 2008. Switched simultaneously with Linux-Live
- Slax (and Linux-Live scripts in general) since version 6
- Xandros Linux distribution, available in the ASUS Eee PC model 901.
- Ubuntu 10.04 LTS Live CD
- Debian 6.0 Live media
- Gentoo Linux LiveDVD 11.0
- Gentoo Linux LiveDVD 11.2
- Gentoo Linux LiveDVD 12.0
- Salix Live via Linux-Live scripts until version 13.1.1 and via SaLT from version 13.37.
- Puppy Linux Versions can run fully in RAM with changes saved to disk on shutdown. For example Slacko 5.3.3. running as a LiveCD
aufs seems to have problems with some underlying file systems, notably btrfs.
- History of the Aufs project maintained by Junjiro Okajima
- Goals and new features of aufs in the project's homepage
- Knoppix release note explaining the switch from Unionfs to aufs.
- Linux Live scripts use AUFS for better stability
- "Gentoo Linux - Gentoo Linux - LiveDVD 11.0". Gentoo.org. 2011-03-08. Retrieved 2012-04-19.
- "Gentoo Linux - Gentoo Linux releases 11.2 LiveDVD". Gentoo.org. 2011-08-07. Retrieved 2012-04-19.
- "Gentoo Linux - Gentoo Linux releases 12.0 LiveDVD". Gentoo.org. 2012-01-02. Retrieved 2012-04-19.
- "Btrfs rm issue · Issue #2961 · dotcloud/docker · GitHub". Retrieved 2014-05-04.
- File system
- Union mount, describing the concept of merging file system branches
- Unionfs, an older union mount project, developed by Professor Erez Zadok and his team at Stony Brook University.
- Lethe (software)