How is aufs different from UnionFS union filesystem?
AuFS started as an implementation of UnionFS Union File System. An union filesystem takes an existing filesystem and transparently overlays it on a newer filesystem. It allows files and directories of separate filesystem to co-exist under a single roof. AuFS can merge several directories and provide a single merged view of it.
How to mount a branch in Linux aufs?
You can also mount by having permissions set for each branches. The above command will mount the /tmp/aufs-root, by having “/tmp/dir1” as writable, and “/home/lakshmanan” as readonly. Any change you do in /tmp/aufs-root, will be saved only under “/tmp/dir1”, since that is the only writable directory.
Which is an example of Aufs in Ubuntu?
On Debian based systems, for example on Ubuntu, do the following to install aufs. This example shows how to mount two directories of a same filesystem. The first two commands created 2 new directories. The mount.aufs is the command to mount the filesystem as Union mount.
How to install aufs on a Debian based system?
On Debian based systems, for example on Ubuntu, do the following to install aufs. This example shows how to mount two directories of a same filesystem. The first two commands created 2 new directories.
What happens when you merge two directories in UnionFS?
Contents of directories which have the same path within the merged branches will be seen together in a single merged directory, within the new, virtual filesystem. When mounting branches, the priority of one branch over the other is specified. So when both branches contain a file with the same name, one gets priority over the other.
What do you need to know about UnionFS?
Jump to navigation Jump to search. Unionfs is a filesystem service for Linux, FreeBSD and NetBSD which implements a union mount for other file systems. It allows files and directories of separate file systems, known as branches, to be transparently overlaid, forming a single coherent file system.
Which is the newer version of UnionFS 2.x?
Version 2.x is a newer, redesigned, and reimplemented one. aufs is an alternative version of unionfs. overlayfs written by Miklos Szeredi has been used in OpenWRT and considered by Ubuntu and has been merged into the mainline Linux kernel on 26 October 2014 after many years of development and discussion for version 3.18 of the kernel.