From owner-freebsd-performance@FreeBSD.ORG Thu Nov 3 02:16:09 2005 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8C12E16A41F for ; Thu, 3 Nov 2005 02:16:09 +0000 (GMT) (envelope-from mv@roq.com) Received: from p4.roq.com (ns1.ecoms.com [207.44.130.137]) by mx1.FreeBSD.org (Postfix) with ESMTP id E468A43D49 for ; Thu, 3 Nov 2005 02:16:08 +0000 (GMT) (envelope-from mv@roq.com) Received: from p4.roq.com (localhost.roq.com [127.0.0.1]) by p4.roq.com (Postfix) with ESMTP id 5AB674D058; Thu, 3 Nov 2005 02:16:33 +0000 (GMT) Received: from [192.168.46.52] (ppp166-27.static.internode.on.net [150.101.166.27]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by p4.roq.com (Postfix) with ESMTP id DBB3D4D093; Thu, 3 Nov 2005 02:16:30 +0000 (GMT) Message-ID: <436972DE.8070002@roq.com> Date: Thu, 03 Nov 2005 13:15:58 +1100 From: Michael VInce User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.7.12) Gecko/20051019 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Markus Kovero References: <000801c5d434$579de280$b3db87d4@multiplay.co.uk> <000801c5d434$579de280$b3db87d4@multiplay.co.uk> <3.0.1.32.20051102022618.00a73dc0@pop.redshift.com> <436896BD.6090405@multiwise.fi> In-Reply-To: <436896BD.6090405@multiwise.fi> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP Cc: freebsd-performance@freebsd.org Subject: Re: SATA: RAID 5 controller recommendations X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Nov 2005 02:16:09 -0000 I have seen some network based SMP related performance problems vanish in 6.0 tests, admittedly I haven't done hard drive based tests but I wouldn't surprise me of performance drops on HDs in SMP on 6.0 are gone as well. Mike Markus Kovero wrote: > Dell's CERC sata raid thingy works fast for me but when I turn SMP on > read performance drops 50%+ (raid1,raid5,raid10 and single volumes). > I don't know if its aac problem or what. > In leenox it works very well though. > > Yours > Markus Kovero > > ray@redshift.com wrote: > >> At 09:17 PM 11/2/2005 +1100, Michael VInce wrote: >> | For SATA I have always been getting the Dell 750s (now 850s) which >> use | the 'aac' >> | Adaptec AdvancedRAID Controller driver, do 'man aac' for more details. >> | Dell supply them with a 64meg cache and are hardware raid, I have >> always | just installed FreeBSD on them and only 1 hard drive comes >> up as RAID | should be. >> | | I have only been ordering the machines in dual drive mirror 1 >> Raid, but | you could get a PowerEdge Tower servers like the 830 >> which do raid 5, I | never used one though. >> | Alternatively all the Dell SCSI RAID systems have 256megs cache >> which | use the LSI Logic MegaRAID ( man amr ) >> | Stay away from the ultra low end SC1425 systems they have some kind >> of | software based raid. >> | | The thing I have noticed is that if you compare other (often >> claiming to | be much cheaper) servers from other companies they >> often really skimp on | their hard drive subsystems with software >> based stuff claiming its RAID. >> | | I used to be anti Dell and build my own U1 servers from case and >> up and | had a keen interest in cheap RAID technologies but I gave up >> a little | while ago. >> | I believe Dell are great value when you consider their RAID | >> implementations and as long as you are happy with Intel chips. >> | | Mike >> | | Steven Hartland wrote: >> | | > Anyone got any SATA RAID 5 controllers they can recommend >> | > 64Bit PCIX. >> | > >> | > Steve >> >> Steve - 3ware is very good. >> >> Mike - I have some benchmarks from a guy using a Dell with a raid and >> was >> surprised to see how slow they were compared to our other hardware. >> I didn't >> run them myself, but the guy is on the list here some place. I can >> send you a >> copy of the spreadsheet if you want to look it over. >> >> Ray >> >> _______________________________________________ >> freebsd-performance@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >> To unsubscribe, send any mail to >> "freebsd-performance-unsubscribe@freebsd.org" >> >> >