From owner-freebsd-geom@FreeBSD.ORG Wed Mar 28 13:21:35 2007 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 8681E16A401 for ; Wed, 28 Mar 2007 13:21:35 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: from web30313.mail.mud.yahoo.com (web30313.mail.mud.yahoo.com [209.191.69.75]) by mx1.freebsd.org (Postfix) with SMTP id 51BFC13C44B for ; Wed, 28 Mar 2007 13:21:35 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: (qmail 54721 invoked by uid 60001); 28 Mar 2007 13:21:34 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=vTBBacIiLM5CADIjNMuZn9kX/RQ2u15E4rr3f2N4Ar2auWoiop3Xx23MfBVKh2g4NwOkcclU4c0RUSYkEsWvTNenjvPrEz7h31RydmJ3qcpF3PIb4IrU91e2CAO+DPz1zv4JfFw3IGH9U8QTfoVtoz8Hb6ot+D3X9PrkXXqEjnc=; X-YMail-OSG: lZMElLcVM1l77JBe1zIJNehY9u7h7CvJbKx5k32duj4ZMPZdqbHArDGdGFUstAOXilV_kjhxpwDy6NcTAlSZJOxJP7fUWOJFyQZTOt7NVD1yS4UVRNgfy37eSOHZXw-- Received: from [85.212.45.2] by web30313.mail.mud.yahoo.com via HTTP; Wed, 28 Mar 2007 06:21:34 PDT Date: Wed, 28 Mar 2007 06:21:34 -0700 (PDT) From: "R. B. Riddick" To: "Szabó" "Péter" , freebsd-geom@freebsd.org In-Reply-To: <008701c77139$613694b0$6502a8c0@peteruj> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <657228.54534.qm@web30313.mail.mud.yahoo.com> Cc: Subject: Re: raid3 is slow X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Mar 2007 13:21:35 -0000 --- Szabó Péter wrote: > raid3 > Transfer rates: > outside: 102400 kbytes in 1.179933 sec = 86785 kbytes/sec > middle: 102400 kbytes in 1.148816 sec = 89135 kbytes/sec > inside: 102400 kbytes in 1.171987 sec = 87373 kbytes/sec > Looks good... > #diskinfo -vt /dev/label/nmivol1 > outside: 102400 kbytes in 1.839020 sec = 55682 kbytes/sec > middle: 102400 kbytes in 2.112483 sec = 48474 kbytes/sec > inside: 102400 kbytes in 3.416896 sec = 29969 kbytes/sec > Looks slow... > # atacontrol mode ad0 > current mode = UDMA100 > # atacontrol mode ad1 > current mode = UDMA100 > # atacontrol mode ad2 > current mode = UDMA100 > # atacontrol mode ad3 > current mode = UDMA100 > # atacontrol mode ad6 > current mode = SATA150 > Looks good... > gstripe may help, and extends disk space, but less secure. > Yup... > #dd if=/dev/zero of=/mnt/new/x.x bs=1m count=128 > 128+0 records in > 128+0 records out > 134217728 bytes transferred in 11.410957 secs (11762180 bytes/sec) > Hmm And what if u try this: dd if=/dev/raid3/... of=/dev/null bs=1m count=128 ? > > Disks ad0 ad1 ad2 ad3 ad6 intrn > > KB/t 8.42 8.42 8.42 8.42 5.67 113904 buf > > tps 287 287 287 287 1780 133 dirtybuf > > MB/s 2.36 2.36 2.36 2.36 9.85 69984 desiredvnodes > > % busy 25 26 24 26 99 21586 numvnodes > 8KB/transfer is a little low for my taste... Looks like ur copy program uses 32KB transfers, instead of 128KB transfers... > > I use mc to copy. > What if u try dd if=/source-file/on/raid3-device of=/dev/null bs=1m count=128 ? -Arne ____________________________________________________________________________________ Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html