linux-kernel - Re: Versioning file system

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Message-ID: <467853BB.1090109@zytor.com>
Date:	Tue, 19 Jun 2007 15:07:55 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Chris Snook <csnook@...hat.com>,
	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,
	alan <alan@...eserver.org>
Subject: Re: Versioning file system

Alan Cox wrote:
> 
> Yes but tdskb:foo.mac[1013,1013,frob];4 is *not* elegant.

I think describing VMS pathname syntax as "not elegant" is kind of like
describing George W. Bush as "not a genius."

> POSIX is very
> clear about what is acceptable as magic in a pathname, and the unix spec
> even more so.  The NetApp approach recognizes two important things
> 
> 1.	Old version access is the oddity not the norm
> 2.	Standards behaviour is important
> 

3. An atomic snapshot is more useful than a bunch of disconnected
per-file version.  Kind of like CVS vs SVN.

	-hpa
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