Date: Thu, 8 Feb 2001 11:36:38 +1100 From: Greg Lehey <grog@lemis.com> To: Matt Dillon <dillon@earth.backplane.com> Cc: Dan Phoenix <dphoenix@bravenet.com>, Andrew Reilly <areilly@bigpond.net.au>, Alfred Perlstein <bright@wintelcom.net>, Andre Oppermann <oppermann@monzoon.net>, Rik van Riel <riel@conectiva.com.br>, Mike Silbersack <silby@silby.com>, Poul-Henning Kamp <phk@critter.freebsd.dk>, Charles Randall <crandall@matchlogic.com>, Jos Backus <josb@cncdsl.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: vinum and qmail (RE: qmail IO problems) Message-ID: <20010208113638.D38406@sydney.worldwide.lemis.com> In-Reply-To: <200102072131.f17LVQv94265@earth.backplane.com>; from dillon@earth.backplane.com on Wed, Feb 07, 2001 at 01:31:26PM -0800 References: <Pine.BSO.4.21.0102071309260.9863-100000@gandalf.bravenet.com> <200102072131.f17LVQv94265@earth.backplane.com>
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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
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