From owner-freebsd-scsi Fri Oct 15 16:53:19 1999 Delivered-To: freebsd-scsi@freebsd.org Received: from chuggalug.clues.com (chuggalug.clues.com [194.217.82.22]) by hub.freebsd.org (Postfix) with ESMTP id AA8A414D4F for ; Fri, 15 Oct 1999 16:53:15 -0700 (PDT) (envelope-from geoffb@chuggalug.clues.com) Received: (from geoffb@localhost) by chuggalug.clues.com (8.9.3/8.9.3) id AAA57754; Sat, 16 Oct 1999 00:53:11 +0100 (BST) (envelope-from geoffb) Date: Sat, 16 Oct 1999 00:53:11 +0100 From: Geoff Buckingham To: Randell Jesup Cc: scsi@FreeBSD.ORG, Mike Sinz Subject: Re: FreeBSD 3.2 / Slow SCSI Dell PowerEdge 4300 Message-ID: <19991016005311.C56536@chuggalug.clues.com> References: <199910152017.OAA51280@panzer.kdm.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.4i In-Reply-To: ; from Randell Jesup on Fri, Oct 15, 1999 at 07:14:15PM +0000 Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Fri, Oct 15, 1999 at 07:14:15PM +0000, Randell Jesup wrote: > Looking at the bonnie results from 10398: > > write cache enabled > -------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 > Number of Tags > NO 100 7222 89.2 6801 21.8 2347 8.5 7330 93.3 7368 14.6 226.5 4.7 > 2 100 7263 90.3 6357 20.3 2730 9.9 7025 90.5 7321 14.9 209.4 4.6 > 3 100 7115 88.1 6406 20.8 2289 8.9 7307 93.9 7335 15.0 212.6 4.5 > 4 100 7281 90.0 6204 20.8 2278 9.1 7267 93.7 7350 15.3 217.6 4.8 > 8 100 7236 89.7 6007 19.4 2284 8.7 7239 93.1 7374 14.9 213.4 4.5 > 16 100 6775 83.7 6110 19.5 2283 8.7 7239 93.1 7380 14.8 217.8 4.8 > 32 100 7265 89.9 4385 13.9 2274 8.7 7302 93.7 7324 14.5 218.9 4.5 > 64 100 6731 83.3 3038 9.8 2271 8.7 7337 94.6 7356 14.7 213.6 4.4 Having brough bonnie into this I must offer some words of caution. Bonnie only has three seekers for the random seek test, which is potentialy very different from a heavily loaded qmail/exim/apache box. Most machines nowdays have a lot of RAM so large testfiles need to be used to minimise cacheing effects (I have allways used -s 1024 but this takes some time :-) -- GeoffB> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message