From owner-freebsd-hackers Sun Jan 21 22:23:02 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id WAA12876 for hackers-outgoing; Sun, 21 Jan 1996 22:23:02 -0800 (PST) Received: from ulc199.residence.gatech.edu (root@ulc199.residence.gatech.edu [199.77.162.99]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id WAA12868 for ; Sun, 21 Jan 1996 22:22:59 -0800 (PST) Received: (from ken@localhost) by ulc199.residence.gatech.edu (8.6.11/8.6.11) id BAA25087; Mon, 22 Jan 1996 01:22:40 -0500 From: Kenneth Merry Message-Id: <199601220622.BAA25087@ulc199.residence.gatech.edu> Subject: Re: some RAID numbers. To: gibbs@freefall.freebsd.org (Justin T. Gibbs) Date: Mon, 22 Jan 1996 01:22:39 -0500 (EST) Cc: mrcpu@cdsnet.net, hackers@FreeBSD.org In-Reply-To: <199601212308.PAA12349@freefall.freebsd.org> from "Justin T. Gibbs" at Jan 21, 96 03:08:43 pm X-Mailer: ELM [version 2.4 PL24 ME8a] Content-Type: text Sender: owner-hackers@FreeBSD.org Precedence: bulk Justin wrote: > (Jaye ? ) wrote: > >I'd like to see the output from bonnie, just so I have some comparisons. > >I have a barracuda with a 2940, and I don't see much better numbers. > I don't have an Atlas, but there are many people on this list that > do. Hopefully one of them will give more exact numbers. I don't > recall the Bonnie results, but iozone for a 2940W to a wide Atlas > was ~7.2MB/s with a command overhead of ~430us (using Bruce's > disklatency program). Here are some numbers from my system: i486/100, Adaptec 2842, 32 mb ram, 256K cache, Quantum Atlas XP34300 FreeBSD 2.1R, Tagged Command Queueing enabled Done on /var, which is only 2% full. (200 meg partition) machine was pretty much idle iozone with 8K blocks, 150 meg file: ---- IOZONE writes a 150 Megabyte sequential file consisting of 19200 records which are each 8192 bytes in length. It then reads the file. It prints the bytes-per-second rate at which the computer can read and write files. Writing the 150 Megabyte file, 'iozone.tmp'...24.875000 seconds Reading the file...31.031250 seconds IOZONE performance measurements: 6323071 bytes/second for writing the file 5068645 bytes/second for reading the file ---- I'm not entirely sure why the writes are significantly faster than the reads. Here are the bonnie results: ---- {area238:/var/tmp:4:0} bonnie File './Bonnie.2611', size: 104857600 Writing with putc()...done Rewriting...done Writing intelligently...done Reading with getc()...done Reading intelligently...done Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done... -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 100 1921 97.2 6121 92.9 2283 53.2 1966 94.6 4848 82.4 94.2 13.6 ---- > -- > Justin T. Gibbs > =========================================== > FreeBSD: Turning PCs into workstations > =========================================== Ken -- Kenneth Merry ken@ulc199.residence.gatech.edu Disclaimer: I don't speak for GTRI, GT, or Elvis.