From owner-freebsd-performance@FreeBSD.ORG Wed Apr 20 14:13:52 2005 Return-Path: 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 60EDF16A4CE for ; Wed, 20 Apr 2005 14:13:52 +0000 (GMT) Received: from mh1.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id A8D3743D4C for ; Wed, 20 Apr 2005 14:13:51 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh1.centtech.com (8.13.1/8.13.1) with ESMTP id j3KEDodv079349; Wed, 20 Apr 2005 09:13:51 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <42666371.9080800@centtech.com> Date: Wed, 20 Apr 2005 09:13:05 -0500 From: Eric Anderson User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.5) Gecko/20050325 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Claus Guttesen References: <4264F8A8.3080405@centtech.com> <426507DC.50409@centtech.com> <42650EB2.4040409@centtech.com> <426642D4.8000202@centtech.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.82/842/Tue Apr 19 16:39:01 2005 on mh1.centtech.com X-Virus-Status: Clean cc: freebsd-performance@freebsd.org Subject: Re: some simple nfs-benchmarks on 5.4 RC2 X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Apr 2005 14:13:52 -0000 Claus Guttesen wrote: >>That's about what I expected. RAID 5 depends on fast xor, so a slow processor >>in a hardware RAID5 box will slow you down a lot. >> >>You should try taking the two RAID5's (6 disks each) created on your original >>controller and striping those together (RAID 50) - this should get you some >>better performance, probably not as close as the amr device, but I would guess >>somewhere in the 80-90mb/s range. > > > This can't be done in hardware, since atabeast only supports raid 0, > 1, 4 and 5. But I will definitively have this in my mind this when we > get a new storage-system (a different one). > > Thank you for your guidance. You could use the atabeast to do two raid 5's, then use vinum to stripe those two. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology A lost ounce of gold may be found, a lost moment of time never. ------------------------------------------------------------------------