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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