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Re: Bug#832451: ITP: aufs4 -- advanced multi layered unification filesystem version 4.x



On Mon, 2016-07-25 at 21:05 +0200, Thomas Goirand wrote:
> On 07/25/2016 06:12 PM, Jan Luca Naumann wrote:
> > Package: wnpp
> > Severity: wishlist
> > Owner: Jan Luca Naumann <j.naumann@fu-berlin.de>
> > 
> > * Package name    : aufs4
> >   Version         : 4.6+20160523
> >   Upstream Author : Junjiro R. Okajima <hooanon05g@gmail.com>
> > * URL             : http://aufs.sourceforge.net/
> > * License         : GPL2+
> >   Programming Lang: C
> >   Description     : advanced multi layered unification filesystem
> > version 4.x
> > 
> > Aufs is a stackable unification filesystem such as Unionfs, which
> > unifies
> > several directories and provides a merged single directory.
> > In the early days, aufs was entirely re-designed and re-implemented
> > Unionfs Version 1.x series. After
> > many original ideas, approaches and improvements, it
> > becomes totally different from Unionfs while keeping the basic
> > features.
> > See Unionfs Version 1.x series for the basic features.
> > Recently, Unionfs Version 2.x series begin taking some of same
> > approaches to aufs's.
> > 
> > I'm intending to package the version 4.x for Debian. The module
> > should use dkms to be build as kernel module.
> > 
> > I hope to do the work as part of the filesystems project on Alioth:
> > https://alioth.debian.org/projects/filesystems/
> > 
> > I need a sponsor for the package.
> 
> We have already overlayfs in modern kernels. Could you explain why we
> need aufs4 as well?

I believe aufs stil has these advantages over overlayfs:

- Can be exported via NFS
- White-outs share an inode rather than
requiring an inode each
- Sparse files remain sparse when copied-up
-
Multiple writeable branches
- Creating a hard link does not require a
copy-up

Ben.

-- 

Ben Hutchings
Knowledge is power.  France is bacon.

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