On Thu, 13 Dec 2007, Geoff Jacobs wrote:
Mark Hahn wrote:
When I try to use the array of
integer actual(9915,9915,9915)
I don't speak fortran natively, but isn't that array
approximately 3.6 TB in size?
Oops, forgot to put the decimal in the right place.
9915^3 * 8 bits/integer / 1024^3 bytes/GB = 907 GB.
It could be done with a 64 bit kernel. Too big for PAE.
Yeah, if you had a box with several hundred memory slots....
Which I say only semi-sarcastically. They sound like they're coming,
they're coming. Who knows, maybe they're here and I'm just out of
touch.
If it is a sparse matrix, them just maybe one can do something on this
scale, but otherwise, well, it's like telling mathematica to go and
compute umpty-something factorial -- it will go out, make a herioc
effort, use all the free memory in the universe, and die valiantly
(perhaps taking down your computer with it if the kernel happens to need
some memory at a critical time when their isn't any). Large scale
computation as a DOS attack...
rgb
--
Robert G. Brown
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone(cell): 1-919-280-8443
Web: http://www.phy.duke.edu/~rgb
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