Date: Mon, 3 Feb 2003 08:31:46 -1000 From: Clifton Royston <cliftonr@lava.net> To: Chad Ziccardi <ziccardi@digitalfreaks.org> Cc: Gabriel Ambuehl <gabriel_ambuehl@buz.ch>, "Rouzer, Charles A (Chuck)" <car@vitalit.com>, freebsd-cluster@FreeBSD.ORG Subject: Re: freebsd cluster target market Message-ID: <20030203083146.A26322@lava.net> In-Reply-To: <20030203123902.D20589@digitalfreaks.org>; from ziccardi@digitalfreaks.org on Mon, Feb 03, 2003 at 12:40:36PM -0500 References: <000901c2b8ef$57e4eb70$0201000a@LAPTOP> <20030110132550.A18143@lava.net> <193699876562.20030112164424@buz.ch> <001701c2ba84$6f307010$0201000a@LAPTOP> <37722441765.20030112230029@buz.ch> <20030203123902.D20589@digitalfreaks.org>
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On Mon, Feb 03, 2003 at 12:40:36PM -0500, Chad Ziccardi wrote:
> begin quote from Gabriel Ambuehl <gabriel_ambuehl@buz.ch> written 2003-01-12:
>
> > I actually once HAD vinum doing network RAID. It's an awful hack and
> > not of any practical use, but enough for proof of concept:
> >
> > Mount foreign filesystem over NFS. Use vn(4) and vnconfig to create a
> > FS backed "partition", use disklabel to assign the correct partition
> > type to it and you're set. It's just horrible unstable, slow and prone
> > to error.
Great (ly twisted) minds think alike, I guess. We experimented with
this some here as a "skunkworks" (unofficial) project using various
combinations of Linux, FreeBSD, OpenBSD, and BSD/OS. The problem is
that no combination we tried seemed to have a solid and stable enough
implementation of NFS and of vinum or "loopback FS" + raidframe, etc.
etc. to get it working reliably. Let alone performing well.
On the freebsd-current list, PHK is sounding pretty enthusiastic
about getting NBD implemented as an available block driver under GEOM.
That would be the "right place" to make it work with pretty much
everything disk-related in FreeBSD, I think.
-- Clifton
--
Clifton Royston -- LavaNet Systems Architect -- cliftonr@lava.net
"If you ride fast enough, the Specialist can't catch you."
"What's the Specialist?" Samantha says.
"The Specialist wears a hat," says the babysitter. "The hat makes noises."
She doesn't say anything else.
Kelly Link, _The Specialist's Hat_
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