From owner-freebsd-hackers Wed Feb 7 16:37:43 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from sydney.worldwide.lemis.com (asbestos.linuxcare.com.au [203.17.0.30]) by hub.freebsd.org (Postfix) with ESMTP id 7264137B401 for ; Wed, 7 Feb 2001 16:37:24 -0800 (PST) Received: (from grog@localhost) by sydney.worldwide.lemis.com (8.11.1/8.9.3) id f180aco38540; Thu, 8 Feb 2001 11:36:38 +1100 (EST) (envelope-from grog) Date: Thu, 8 Feb 2001 11:36:38 +1100 From: Greg Lehey To: Matt Dillon Cc: Dan Phoenix , Andrew Reilly , Alfred Perlstein , Andre Oppermann , Rik van Riel , Mike Silbersack , Poul-Henning Kamp , Charles Randall , Jos Backus , freebsd-hackers@FreeBSD.ORG Subject: Re: vinum and qmail (RE: qmail IO problems) Message-ID: <20010208113638.D38406@sydney.worldwide.lemis.com> References: <200102072131.f17LVQv94265@earth.backplane.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: <200102072131.f17LVQv94265@earth.backplane.com>; from dillon@earth.backplane.com on Wed, Feb 07, 2001 at 01:31:26PM -0800 Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-418-838-708 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wednesday, 7 February 2001 at 13:31:26 -0800, Matt Dillon wrote: > > In anycase, while VINUM is great for striping disks I recommend that > you use CCD to begin with, because CCD is a whole lot less complex. > You can stripe IDE drives but the two drives must be on different IDE > controllers (not just primary secondary, but each drive must be primary > on its own controller). Then striping will help. I'd contest that. I find configuring ccd very confusing. But recall that error recovery with ccd is extremely primitive. With Vinum you can add mirroring on the fly, and if a mirror dies, the volume carries on running. > Of course, I would not recommend using IDE at all if you are > pushing 600MB/day in mail. You really should be using a SCSI > based system... something like the VALINUX boxes (running > either Linux or FreeBSD). If you have only one drive per IDE controller, performance can be very good. You definitely don't want more than one drive, though. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message