linux-kernel - Re: [RFC] VFS: FS CoW using redirection

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Message-ID: <20060823180552.GC28873@filer.fsl.cs.sunysb.edu>
Date:	Wed, 23 Aug 2006 14:05:52 -0400
From:	Josef Sipek <jsipek@....cs.sunysb.edu>
To:	Jörn Engel <joern@...nheim.fh-wedel.de>
Cc:	Al Boldi <a1426z@...ab.com>,
	Eric Van Hensbergen <ericvh@...il.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] VFS: FS CoW using redirection

On Wed, Aug 23, 2006 at 07:24:02PM +0200, Jörn Engel wrote:
> On Sun, 9 July 2006 15:50:36 +0300, Al Boldi wrote:
> > 
> > Consider something simple like this:
> > 
> > VFS - anyFS1 (r/w) used normally, unless ENotFound, then redirect read to
> >     \              anyFS2, or CoW from anyFS2 to anyFS1.
> >       anyFS2 (r/o) used normally.
> 
> That concept is known as union mount.  Jan Blunck did some patches in
> that direction, you might be able to find them in the archives.  If
> not, just send him a mail.

Or you can give Unionfs a try: http://www.unionfs.org

Josef "Jeff" Sipek.

-- 
The box said "Windows XP or better required". So I installed Linux.
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