From owner-freebsd-stable  Tue May 28  0:31:35 2002
Delivered-To: freebsd-stable@freebsd.org
Received: from wantadilla.lemis.com (wantadilla.lemis.com [192.109.197.80])
	by hub.freebsd.org (Postfix) with ESMTP id D26C037B40A
	for <freebsd-stable@FreeBSD.ORG>; Tue, 28 May 2002 00:31:27 -0700 (PDT)
Received: by wantadilla.lemis.com (Postfix, from userid 1004)
	id 6660D814A1; Tue, 28 May 2002 17:01:25 +0930 (CST)
Date: Tue, 28 May 2002 17:01:25 +0930
From: Greg 'groggy' Lehey <grog@FreeBSD.org>
To: Lamont Granquist <lamont@scriptkiddie.org>
Cc: Cy Schubert - CITS Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>,
	Kirk Strauser <kirk@strauser.com>, freebsd-stable@FreeBSD.ORG
Subject: Re: Hardware RAID vs vinum
Message-ID: <20020528170125.S16567@wantadilla.lemis.com>
References: <20020528095948.D16567@wantadilla.lemis.com> <20020528002940.G449-100000@coredump.scriptkiddie.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20020528002940.G449-100000@coredump.scriptkiddie.org>
User-Agent: Mutt/1.3.23i
Organization: The FreeBSD Project
Phone: +61-8-8388-8286
Fax: +61-8-8388-8725
Mobile: +61-418-838-708
WWW-Home-Page: http://www.FreeBSD.org/
X-PGP-Fingerprint: 9A1B 8202 BCCE B846 F92F  09AC 22E6 F290 507A 4223
Sender: owner-freebsd-stable@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-stable.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-stable>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-stable>
X-Loop: FreeBSD.ORG

On Tuesday, 28 May 2002 at  0:30:35 -0700, Lamont Granquist wrote:
>
>
> On Tue, 28 May 2002, Greg 'groggy' Lehey wrote:
>> On Monday, 27 May 2002 at  6:02:23 -0700, Cy Schubert - CITS Open Systems Group wrote:
>>>
>>> It turned out that moving the application to hardware RAID improved
>>> performance by 40 times.
>>
>> This can only happen if there's something very wrong with the software
>> RAID-5, either the implementation or the configuration.
>
> My first thought was cache on the hardware RAID array.

Mine too.  But that wouldn't normally give that much of on
improvement.

Greg
--
See complete headers for address and phone numbers

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message