Date: Mon, 1 Nov 1999 17:19:36 +0100 From: Eivind Eklund <eivind@FreeBSD.ORG> To: Don <don@calis.blacksun.org> Cc: Jacques Vidrine <n@nectar.com>, freebsd-fs@FreeBSD.ORG Subject: Re: journaling UFS and LFS Message-ID: <19991101171936.J72085@bitbox.follo.net> In-Reply-To: <Pine.BSF.4.05.9910301936530.44134-100000@calis.blacksun.org>; from don@calis.blacksun.org on Sat, Oct 30, 1999 at 07:40:35PM -0400 References: <19991030233304.03DB31DA4@bone.nectar.com> <Pine.BSF.4.05.9910301936530.44134-100000@calis.blacksun.org>
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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
* Ability to span more than one disk
* Performance guarantees
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. It is designed to run at the bottom end of a chain of
stacked filesystems. If you want e.g. symlinks to work, you need
to stack a layer.
(2) It is not designed to run on a single spindle. Single spindle
performance will be horrible.
Eivind.
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