Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site watrose.UUCP Path: utzoo!watmath!watrose!cdshaw From: cdshaw@watrose.UUCP (Chris Shaw) Newsgroups: net.micro,net.college Subject: Re: Overloaded Computing Systems Message-ID: <7195@watrose.UUCP> Date: Mon, 7-Jan-85 17:47:10 EST Article-I.D.: watrose.7195 Posted: Mon Jan 7 17:47:10 1985 Date-Received: Tue, 8-Jan-85 03:13:59 EST References: <773@amdahl.UUCP> <10468@watmath.UUCP> <1312@eosp1.UUCP> <4844@utzoo.UUCP> Reply-To: cdshaw@watrose.UUCP (Chris Shaw) Organization: U of Waterloo, Ontario Lines: 23 Xref: watmath net.micro:9012 net.college:616 The last time I used an IBM 4341 (approx CPU power of a VAX 780) with 80 users (active) to do editing on a 3278, there was a minimal degree of I/O wait involved. XEDIT was the editor, and I had configured it as I preferred it, so as to remove some silly quirks. The last time I used a VAX 780 with 80 users on it, I woke up regretting the pizza I ate earlier that night. Seriously... the turnaround was sooooo bad I went home. The point is this.. mainframe channel-style architecture exacts a small convenience price for a huge performance improvement. Real life has confirmed this many times over for me, and that's why I'd rather use VM/CMS for editing than vi and 4.2bsd, especially if system load is a problem. Wether the performance improvement is due to full duplex or not, I cannot answer, but I can type and read input simultaneously on a 3278, so it looks all the same to me !!! This point of information brought to you by.. CD Shaw