From owner-freebsd-stable@FreeBSD.ORG Thu Dec 23 19:40:09 2004 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4B1F716A4CE for ; Thu, 23 Dec 2004 19:40:09 +0000 (GMT) Received: from yak.fluid.com (yak.fluid.com [63.76.105.204]) by mx1.FreeBSD.org (Postfix) with ESMTP id 242E443D5A for ; Thu, 23 Dec 2004 19:40:09 +0000 (GMT) (envelope-from darren@3x3x3.org) Received: from boomstick.fluid.com ([63.76.105.102]) by yak.fluid.com with esmtpa (Exim 4.43 #1) id 1ChYjJ-00059m-HW; Thu, 23 Dec 2004 11:34:33 -0800 Message-ID: <41CB1F52.2010800@3x3x3.org> Date: Thu, 23 Dec 2004 11:41:06 -0800 From: darren david User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Mike Tancsa References: <41CAB1A9.9040903@speechpro.com> <6.2.0.14.0.20041223101407.1053a0e8@64.7.153.2> In-Reply-To: <6.2.0.14.0.20041223101407.1053a0e8@64.7.153.2> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: Igor Robul cc: freebsd-stable@freebsd.org Subject: Re: Poor performance with 3Ware 7506LP RAID X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: darren-freebsd@3x3x3.org List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Dec 2004 19:40:09 -0000 >> Hello, >> we have performance problem with 3Ware 7506LP RAID5. For example if we >> execute rsync for large array of data, then >> 'systat -vmstat' shows 100% load on twed0, and many other processes >> wait disk I/O. >> >> Also, which SATA RAID controller would you recomend for >> Samba/Courier-IMAP server for company with 80 users? > > > I think the 7xxx series is not so great for RAID5 speed wise. I know on > our 7810, its lucky to get 15MB/s on block writes on 6 160G > ST3160021A... I havent tested the 8xxx series in RAID5, but supposedly > they are faster as is the 9000. But I dont know about the stability of > the 9xxx series drivers (twe vs twa). If speed and reliability is what > you want, look at RAID10. Our one mail server on RAID10 sees about > 15-40 concurrent connections a second at peak times. With a lot of RAM > and Maildir format, there is hardly any blocking going on. I'm running a 9500 on 5.3-STABLE with 4x250 RAID 5, performance is solid and it's totally stable. Can't say the same for the 3dm2 software, tho. Still no luck getting that up and running. darren