Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 13 Nov 2001 11:43:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 13 Nov 2001 11:43:44 -0500 Received: from stine.vestdata.no ([195.204.68.10]:51334 "EHLO stine.vestdata.no") by vger.kernel.org with ESMTP id ; Tue, 13 Nov 2001 11:43:33 -0500 Date: Tue, 13 Nov 2001 17:43:26 +0100 From: =?iso-8859-1?Q?Ragnar_Kj=F8rstad?= To: Roy Sigurd Karlsbakk Cc: linux-kernel@vger.kernel.org, lars.nakkerud@compaq.com Subject: Re: Tuning Linux for high-speed disk subsystems Message-ID: <20011113174326.A32405@vestdata.no> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.2.5i In-Reply-To: ; from roy@karlsbakk.net on Tue, Nov 13, 2001 at 03:29:13PM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 13, 2001 at 03:29:13PM +0100, Roy Sigurd Karlsbakk wrote: > After some testing at Compaq's lab in Oslo, I've come to the conclusion > that Linux cannot scale higher than about 30-40MB/sec in or out of a > hardware or software RAID-0 set with several stripe/chunk sizes tried out. Eh, we do 60-70 MB/s reads and 110-120 MB/s writes on our RAIDs... from linux. > Does anyone know this stuff good enough to help me how to tune the system? > PS: The CPUs were almost idle during the test. Tested file system was > ext2. I'd say you should get rid of your compaq raid controller and use a regular SCSI-controller - 66Mhz 64 bit. (e.g. an adaptec) -- Ragnar Kj?rstad Big Storage - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/