From owner-freebsd-hackers Sat Nov 8 03:43:01 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id DAA04274 for hackers-outgoing; Sat, 8 Nov 1997 03:43:01 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from unicorn.uk1.vbc.net (unicorn.uk1.vbc.net [194.207.2.11]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id DAA04252; Sat, 8 Nov 1997 03:42:49 -0800 (PST) (envelope-from gordon@drogon.net) Received: from localhost (gordon@localhost) by unicorn.uk1.vbc.net (8.8.5/8.8.5) with SMTP id LAA31926; Sat, 8 Nov 1997 11:42:42 GMT Date: Sat, 8 Nov 1997 11:42:41 +0000 (GMT) From: Gordon Henderson X-Sender: gordon@unicorn To: Stefan Esser cc: Amancio Hasty , hackers@FreeBSD.ORG Subject: Re: Seagate Cheetah performance... In-Reply-To: <19971108114521.06151@mi.uni-koeln.de> Message-ID: Distribution: world Organization: Home for lost Drogons MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Sat, 8 Nov 1997, Stefan Esser wrote: > Please test all three drives with Bonnie. Use a test file at > least twice as much as your system's RAM, and report your > findings ... > > You'll get a different picture, I assume ! As Stefan says, you have to use a test file size more than your memory system has, and the bigger the better, and bonnie is fairly universally accepted, isn't it? To show you how misleading things can be, when a memory cache gets in the way, heres a bonnie outout on a 32MB file (on a 256MB machine) -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 32 6321 96.0 26077 76.1 14800 91.8 6127 94.8 40595 94.4 3320.7 90.0 40MB/sec read rate! Impressive, huh? (interesting to note how innefficient character reading/writing is over block reading/writing!) Is there a Bonnie that copes with > 2GB files yet? I'm using one that I've had for several years now... Gordon