linux-kernel - Re: Versioning file system

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Message-ID: <4676F9A2.6010007@zytor.com>
Date:	Mon, 18 Jun 2007 14:31:14 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	alan <alan@...eserver.org>
CC:	Bodo Eggert <7eggert@....de>, Theodore Tso <tytso@....edu>,
	Jörn Engel <joern@...fs.org>,
	Jack Stone <jack@...keye.stone.uk.eu.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	akpm@...ux-foundation.org, viro@...iv.linux.org.uk
Subject: Re: Versioning file system

alan wrote:
> On Mon, 18 Jun 2007, Bodo Eggert wrote:
> 
>> alan <alan@...eserver.org> wrote:
>>
>>> I just wish that people would learn from the mistakes of others.  The
>>> MacOS is a prime example of why you do not want to use a forked
>>> filesystem, yet some people still seem to think it is a good idea.
>>> (Forked filesystems tend to be fragile and do not play well with
>>> non-forked filesystems.)
>>
>> What's the conceptual difference between forks and extended user
>> attributes?
> 
> Forks tend to contain more than just extended attributes.  They contain
> all sorts of other meta-data including icons, descriptions, author
> information, copyright data, and whatever else can be shoveled into them
> by the author/user.

And that makes them different from extended attributes, how?

Both of these really are nothing but ad hocky syntactic sugar for
directories, sometimes combined with in-filesystem support for small
data items.

	-hpa
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