Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!husc6!rutgers!dayton!ems!meccts!pwcs!dennisg From: dennisg@pwcs.StPaul.GOV (Dennis Grittner) Newsgroups: comp.sys.mac Subject: Re: Why is A/UX disk I/O only 50KB/sec? Message-ID: <3241@pwcs.StPaul.GOV> Date: Mon, 27-Jul-87 18:15:58 EDT Article-I.D.: pwcs.3241 Posted: Mon Jul 27 18:15:58 1987 Date-Received: Wed, 29-Jul-87 01:53:52 EDT References: <2363@ames.arpa> <344@swanee.OZ> Reply-To: dennisg@pwcs.StPaul.GOV (Dennis Grittner) Organization: City of St. Paul Public Works Lines: 29 In article <344@swanee.OZ> gustav@swanee.OZ (Gustav) writes: >In article <2363@ames.arpa>, jaw@ames.arpa (James A. Woods) writes: >> During Phoenix USENIX, at the Unisoft booth, on the Mac II, >> a "time cat /usr/dict/words > /dev/null" took about four seconds >> of clock time. > >Well, let me compare this to our VAX 11/750 running 4.2BSD. The disk >we use is RA81: Lots of stuff removed about times, etc. > >The system at the moment has 5 users and the load is 4.2. >Mac II wins a long way! What you are witnessing on the 11/750 is called DEC never could do I/O. I can't recall his name , but at a Uniforum in D.C. the best comment I heard ( at a networking type forum ) was the famous " my dog could do a better job of designing I/O than DEC did on the Vax ". I haven't benched the latest Vaxen but I sure did the older ones and I bought a Pyramid just to get a Unix box that could do I/O. That's not a BSD I/O problem it's a Vax I/O limitation. -- Dennis Grittner City of Saint Paul, Minnesota (612) 298-4402 Room 700, 25 W. 4th St. 55102