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- From: zstern@adobe.com (Zalman Stern)
- Subject: Re: HOw many PC's make an Amdahl mainframe
- Message-ID: <1993Jan26.215541.9957@adobe.com>
- Sender: usenet@adobe.com (USENET NEWS)
- Organization: Adobe Systems Incorporated
- References: <1k46ioINNijv@fido.asd.sgi.com>
- Date: Tue, 26 Jan 1993 21:55:41 GMT
- Lines: 31
-
- In article <1k46ioINNijv@fido.asd.sgi.com> gints@prophet.esd.sgi.com (Gints
- Klimanis) writes:
- > An Amdahl CEO in yesterday's San Jose Mercury news claimed there was no
- > room in the world that could how enough personal computers to match the
- > power of an Amdahl mainframe. Any guesses as to the # of PC's and disk
- > drives required to match this Amdahl Mount Everest of computing?
-
- How do you define "room"? I'm sure the blimp hangar over at Moffet would do
- it. I expect the average machine room you stuff an Amdahl mainframe in could
- hold enouhg PCs to numerically add up to an Amdahl mainframe. Being
- generous, the Mainframe = 1000 SPECMarks (N way multiprocessor) and 10
- Gigabytes/sec of "I/O bandwidth". At 30 SPECMarks per 486 box, thats 33 PCs.
- At 10 Megabytes per second I/O Bandwidth per EISA 486 (a probably bogus
- number) thats 1000 PCs. Assuming 3 cubic feet per PC that's somewhere
- between 100 and 3,000 cubic feet. You can put 1 or 2 gigs of disk in each PC
- to take care of the disk farm. Then just pile all them PC's up floor to
- celing and you're ready to do some real computin'!
-
- Comments like this indicate that the big iron boys are pretty desperate.
- They are fighting the dynamics of the market. There are *relatively* few
- problems that require "mainframe power." Over time mainframes must either
- become cheaper or more powerful. More powerful is limited because there are
- fewer and fewer problems that require that kind of power and it becomes
- harder and harder to make the machine more powerful. Cheaper is a problem
- because the margins go down and a lot of a mainframe's costs are not
- hardware oriented. (I.e. service, paying for the space and other central
- facilities required.)
- --
- Zalman Stern zalman@adobe.com (415) 962 3824
- Adobe Systems, 1585 Charleston Rd., POB 7900, Mountain View, CA 94039-7900
- "...And I didn't even need pants!!"--Dilbert on The Net (by Scott Adams)
-