linux-kernel - Re: Versioning file system

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Message-ID: <4678550D.6070705@zytor.com>
Date:	Tue, 19 Jun 2007 15:13:33 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	david@...g.hm
CC:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	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

david@...g.hm wrote:
> 
> the only trouble I ever had with the .snapshot approach is when tar or
> find would decend down into the .snapshot when I didn't really intend
> for it to do so.
> 

Netapp optionally made .snapshot not show up in readdir, which solved
that problem.

I have a bigger issue with it starting with only one dot, which is
traditionally used for user configuration information.  I think
..snapshot would have been a better choice, and by extension leaving
double-dot filenames as filesystem namespace (I know that contradicts
POSIX, but the only namespace available in POSIX is /../ which is a
global namespace.)

	-hpa
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