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From: aglew@ccvaxa.UUCP
Newsgroups: net.arch
Subject: Re: VERY LARGE main memories; HOW M
Message-ID: <5100141@ccvaxa>
Date: Fri, 26-Sep-86 01:15:00 EDT
Article-I.D.: ccvaxa.5100141
Posted: Fri Sep 26 01:15:00 1986
Date-Received: Tue, 30-Sep-86 04:48:48 EDT
References: <1128@tekig5.UUCP>
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Nf-ID: #R:tekig5.UUCP:1128:ccvaxa:5100141:000:787
Nf-From: ccvaxa.UUCP!aglew    Sep 26 00:15:00 1986


>This is another problem with virtual memory - central memory is
>starting to get cheaper and bigger than the disk memory.  The biggest
>disk drive available with a Cray these days is a DD-49 (holds about
>151 MW).  One memory image of the 4GW Cray 3 would fill 26 DD-49s to
>capacity.  What are you going to operate virtual memory out of?
>
>J. Giles
>Los Alamos

Main memory will be as much high speed RAM as you can afford.
Virtual memory will be slightly slower speed but less expensive RAM.
You'll still be able to page - but paging will be done so fast that
you won't have time for all the complicated paging algorithms that
are used today.

Andy "Krazy" Glew. Gould CSD-Urbana.    USEnet:  ihnp4!uiucdcs!ccvaxa!aglew
1101 E. University, Urbana, IL 61801    ARPAnet: aglew@gswd-vms