From owner-freebsd-fs  Tue Nov  2 13:59:30 1999
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Date: Tue, 2 Nov 1999 15:46:14 -0500
From: Greg Lehey <grog@lemis.com>
To: Eivind Eklund <eivind@FreeBSD.org>, Don <don@calis.blacksun.org>
Cc: Jacques Vidrine <n@nectar.com>, freebsd-fs@FreeBSD.org
Subject: Re: journaling UFS and LFS
Reply-To: Greg Lehey <grog@lemis.com>
References: <19991030233304.03DB31DA4@bone.nectar.com> <Pine.BSF.4.05.9910301936530.44134-100000@calis.blacksun.org> <19991101171936.J72085@bitbox.follo.net>
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In-Reply-To: <19991101171936.J72085@bitbox.follo.net>; from Eivind Eklund on Mon, Nov 01, 1999 at 05:19:36PM +0100
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On Monday,  1 November 1999 at 17:19:36 +0100, Eivind Eklund wrote:
> On Sat, Oct 30, 1999 at 07:40:35PM -0400, Don wrote:
>> This is getting off topic. What features would you like to see in a new
>> file system. Some suggestions were made. Would you like to add anything to
>> this list?
>
> Yes.
> * Easy to do concurrent access from multiple hosts to the same
>   physical media

You can never do this in the general case (where any host may request
access to any part of the disk).  The best you could do there is a
file server, but they're not quite our terms of reference.

> * Ability to span more than one disk

That's not necessarily a file system feature.  Vinum does that now.

> I have design papers on the FS designed for G2, which was intended to
> support all of the features I've seen listed so far.  It has a couple
> of drawbacks:
> (1) It is not designed to have the semantics of a standard Unix
>     filesystem.

That doesn't surprise me, if you want to implement the first of your
suggestions.

Is there anything in there which would be of interest in our
environment?

Greg
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