From owner-freebsd-stable Wed May 29 16:28:39 2002 Delivered-To: freebsd-stable@freebsd.org Received: from zircon.seattle.wa.us (sense-sea-CovadSub-0-80.oz.net [216.39.147.80]) by hub.freebsd.org (Postfix) with SMTP id CBD2E37B403 for ; Wed, 29 May 2002 16:28:31 -0700 (PDT) Received: (qmail 78864 invoked from network); 29 May 2002 23:28:30 -0000 Received: from localhost (127.0.0.1) by localhost with SMTP; 29 May 2002 23:28:30 -0000 Subject: Re: Hardware RAID vs vinum From: Joe Kelsey To: Scott Long Cc: freebsd-stable@freebsd.org In-Reply-To: <20020529141141.GC2262@hollin.btc.adaptec.com> References: <2C7CBDC6EA58D6119E4A00065B3A24CB04636E@btcexc01.btc.adaptec.com> <20020529134211.L82424@wantadilla.lemis.com> <20020529141141.GC2262@hollin.btc.adaptec.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.5 Date: 29 May 2002 16:28:30 -0700 Message-Id: <1022714910.9847.16.camel@zircon.zircon.seattle.wa.us> Mime-Version: 1.0 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, 2002-05-29 at 07:11, Scott Long wrote: > On Wed, May 29, 2002 at 01:42:11PM +0930, Greg 'groggy' Lehey wrote: > > > > I'm sure that there are good reasons for small stripe sizes. I don't > > believe that efficiency is one of them. I think your problem is that > > you're looking at single-request latency. That's usually not an > > issue, though it may impact copy performance. As I said, though, > > that's not usually where you would use RAID-5. The real issue is not > > so much latency as throughput. I hope I've been able to make it more > > understandable. > It is obvious that I have tread onto religious territory here, and > as such there is probably little I can say to convince you of my > points. I think that we must then agree to disagree =-) Au contraire. There is no religion involved. Greg presented hard facts. You can either refute his facts by presenting your own hard facts or else concede the point. If you cannot refute the facts, then you, by implication, concede the argument. /Joe To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message