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From: vaf@Valinor.Stanford.EDU (Vince Fuller)
Newsgroups: comp.sys.dec
Subject: Performance comparison: pmax vs. vax
Message-ID: <7062@lindy.Stanford.EDU>
Date: 11 Jan 90 02:20:11 GMT
Sender: news@lindy.Stanford.EDU (News Service)
Reply-To: vaf@Valinor.Stanford.EDU
Organization: Stanford University
Lines: 16


I'm interested in hearing about experiences that others have had with
the performance of the two different DEC architectures. Ideally, I'd
like to know what folks feel about the pmax (DS3100) vs the microvax
3800 series, for overall system performance, not just CPU speed (the
DS3100 seems to win that one). In particular, how do the systems stack
up for heavily I/O bound processes? My impression from having a pmax on
my desk is that the RZ55 disk + SCSI combination is rather slow. How
does it compare to a microvax-3800 with RF71 + Qbus? We are considering
using these systems a) a big network server machine (domain service,
mail relaying, etc.) and b) as general purpose timesharing/development
machine. I'd like to get a feel for which architecture will give better
overall performance in each case.

        Thanks,
        --Vince