linux-kernel - Re: Versioning file system

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Message-ID: <20070619203843.GU8154@parisc-linux.org>
Date:	Tue, 19 Jun 2007 14:38:43 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	John Stoffel <john@...ffel.org>
Cc:	Jack Stone <jack@...keye.stone.uk.eu.org>,
	Chris Snook <csnook@...hat.com>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, akpm@...ux-foundation.org,
	viro@...iv.linux.org.uk, "H. Peter Anvin" <hpa@...or.com>,
	alan <alan@...eserver.org>
Subject: Re: Versioning file system

On Tue, Jun 19, 2007 at 04:34:42PM -0400, John Stoffel wrote:
> >>>>> "Jack" == Jack Stone <jack@...keye.stone.uk.eu.org> writes:
> 
> Jack> The whole idea of the file system is that it wouldn't return the
> Jack> file in the file listing. The user would have to know that the
> Jack> file system was versioning to access the older versions as they
> Jack> would explicitly have to request them.
> 
> So tell me what happens when I do:
> 
> 	touch foo:121212121212

You create a new file called 'foo:121212121212'.  If you then modify it,
you could access the old version as foo:121212121212:0.

(The .snapshot directory makes more sense than magic names, since you
can see what versions of a file are available without a special tool).
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