From owner-freebsd-stable@FreeBSD.ORG Wed Jan 14 06:11:19 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 2A23C16A4CE for ; Wed, 14 Jan 2004 06:11:19 -0800 (PST) Received: from ngfl.dialnet.com (ngmail.ngfl.dialnet.com [212.44.44.76]) by mx1.FreeBSD.org (Postfix) with ESMTP id 115F643D2D for ; Wed, 14 Jan 2004 06:11:16 -0800 (PST) (envelope-from ict@cardinalnewman.coventry.sch.uk) Received: from ngmfilt.ngfl.dialnet.com [212.44.44.121] by ngfl.dialnet.com with ESMTP (SMTPD32-6.06) id AD18311C003C; Wed, 14 Jan 2004 14:07:20 +0000 Received: from relay.ngfl.dialnet.com (unverified) by ngmfilt.ngfl.dialnet.com ; Wed, 14 Jan 2004 14:06:56 +0000 Received: from firewall.cardinalnewman.lan (swtp74-53-91.adsl.seed.net.tw [172.30.0.70]) by ngrelay.dialnet.com with SMTP (MailShield v2.04 - WIN32 Jul 17 2001 17:12:42); Wed, 14 Jan 2004 14:09:08 -0000 Received: from mail.cardinalnewman.lan (mail.cardinalnewman.lan [192.168.0.3]) i0EEAnPW005017; Wed, 14 Jan 2004 14:10:49 GMT (envelope-from ict@cardinalnewman.coventry.sch.uk) Received: from dumpster.cardinalnewman.lan (dumpster.cardinalnewman.lan [192.168.0.9])i0EEAmcF092506; Wed, 14 Jan 2004 14:10:49 GMT (envelope-from ict@cardinalnewman.coventry.sch.uk) From: ict technician Organization: Cardinal Newman School To: Ari Suutari , Karl Pielorz , freebsd-stable@freebsd.org Date: Wed, 14 Jan 2004 14:10:47 +0000 User-Agent: KMail/1.5.4 References: <200401141453.50150.ari@suutari.iki.fi> <741002750.1074086443@rainbow> <200401141527.11930.ari@suutari.iki.fi> In-Reply-To: <200401141527.11930.ari@suutari.iki.fi> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200401141410.47630.ict@cardinalnewman.coventry.sch.uk> X-Virus-Scanned: by amavisd-milter (http://amavis.org/) X-Spam-Status: No, hits=-32.2 required=5.0 tests=EMAIL_ATTRIBUTION,IN_REP_TO,QUOTED_EMAIL_TEXT,REFERENCES, REPLY_WITH_QUOTES,USER_AGENT_KMAIL version=2.50 X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp) X-Filter-Version: 1.11a (mail.cardinalnewman.lan) X-SMTP-HELO: firewall.cardinalnewman.lan X-SMTP-MAIL-FROM: ict@cardinalnewman.coventry.sch.uk X-SMTP-RCPT-TO: ari@suutari.iki.fi X-SMTP-RCPT-TO: kpielorz@tdx.co.uk X-SMTP-RCPT-TO: freebsd-stable@freebsd.org X-SMTP-PEER-INFO: swtp74-53-91.adsl.seed.net.tw [172.30.0.70] Subject: Re: Adaptect raid performance with FreeBSD X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Jan 2004 14:11:19 -0000 On Wednesday 14 January 2004 1:27 pm, Ari Suutari wrote: > Hi, > > On Wednesday 14 January 2004 15:20, Karl Pielorz wrote: > > > So, I get only about 25MB/s. Shouldn't I be getting something > > > like 70 MB/s, or even more since there are two disks that > > > can server read requests ? > > > > Hmmm, what happens if you run two of those at once? > > Running 5 dd's at once gives in iostat: > > tty da0 da1 acd0 cpu > tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id > 1 146 0.00 0 0.00 64.00 473 29.58 0.00 0 0.00 0 0 1 1 98 > 0 38 0.00 0 0.00 64.00 625 39.06 0.00 0 0.00 0 0 2 1 97 > 0 38 0.00 0 0.00 64.00 492 30.76 0.00 0 0.00 0 0 2 1 97 > 0 38 0.00 0 0.00 64.00 506 31.62 0.00 0 0.00 0 0 1 0 98 > 0 38 0.00 0 0.00 64.00 495 30.94 0.00 0 0.00 0 0 1 1 98 > > The peak seems to be 39 Mb/s. > > > But, I can't remember seeing adjusting it making any real-world > > difference - what happens if you max it out (e.g. 128, or 256)? > > I'll have to try this. However, I also doubt that it is not going > to change anything. > > Ari S. Where's the other CPU? What's da0 - send dmesg output -- i j hart ICT Technician Cardinal Newman Catholic School & Community College