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Newsgroups: comp.unix.bsd.freebsd.misc Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!zombie.ncsc.mil!news.mathworks.com!gatech!howland.reston.ans.net!news.sprintlink.net!dorite!not-for-mail From: root@dyson.iquest.net (John S. Dyson) Subject: Re: disk IO Message-ID: <3umn9u$2p1@dyson.iquest.net> Lines: 62 Sender: news@iquest.net (News Admin) Organization: John S. Dyson's Machine References: <3uj5ej$169@trauma.rn.com> <3ukr1k$8u1@vodka.intele.net> Date: Thu, 20 Jul 1995 23:02:22 GMT In article <3ukr1k$8u1@vodka.intele.net>, Barnacle Wes <wes@intele.net> wrote: >larry@rn.com (Larry Snyder) wrote: >>I'm running Linux 1.2.11 and am considering switching to freeBSD >>to install the netscape server >> >>what is the disk IO on EIDE drives like with FreeBSD as compared >>against Linux? > >I don't know what Linux i/o rates are like, but with my setup, using a >Kouwell (i.e. Cheap) VL-Bus EIDE controller and WD Caviar disk drives >(420 and 850 meg) on my 486dx2/66, I get 1.3 Mb/sec read and 980 Kb/sec >write from iozone. > This is the IOZONE auto results for my 486DX2/66 (straight--untuned) with 20MB of RAM while receiving a newsfeed and sup update of the FreeBSD tree (system not idle). But the competing disk activity was on other drives... The drive is a caviar-540 and STANDARD ISA IDE... The filesystem has been used for mostly static storage, but have done some package builds from the ports tree. This test was not cooked at all and the first run... I have seen easily >2500Mbytes/second (I think 2800) on EIDE interfaces running this same test on the 1GB Caviars. IOZONE: Performance Test of Sequential File I/O -- V2.01 (10/21/94) By Bill Norcott Operating System: POSIX 1003.1-1990 -- using fsync() IOZONE: auto-test mode MB reclen bytes/sec written bytes/sec read 1 512 1458888 5592405 1 1024 1698958 7895160 1 2048 1917396 9586980 1 4096 2003249 11184810 1 8192 2164802 13421772 2 512 1483068 5263440 2 1024 1864135 7895160 2 2048 2080895 10324440 2 4096 2314098 11671106 2 8192 2354696 12782640 4 512 1335499 4880644 4 1024 1789569 6547206 4 2048 2056976 7895160 4 4096 2018311 9099506 4 8192 2147483 10526880 8 512 1364347 1685622 8 1024 1743087 1804608 8 2048 1907179 1927723 8 4096 1977425 2022112 8 8192 1945184 1966560 16 512 1203746 1676411 16 1024 1586029 1934669 16 2048 1809169 1854476 16 4096 1999519 2018311 16 8192 2041334 1964760 Completed series of tests John dyson@root.com