User:SRombauts/sandbox

aufs is an alternative version of unionfs a filesystem service which implements a union mount for Linux file systems. It is developed by Junjiro Okajima since early 2006.

It is a complete rewriting of unionfs, mainly to improve reliability and performances. It has also introduced some new concepts, like writable branch balancing, and many little improvement. Some of these new ideas are now re-implemented in the unionfs 2.x branch.

Another big difference is that part of unionfs 1.x is currently merged in the linux kernel (and 2.x in the --mm experimental tree) whereas aufs is not. This is because his author consider that aufs is still in development stage.

Aufs has been chosen for replacement of unionfs by the Knoppix live CD Linux distribution since the end of 2006, "for better stability & performance"