p4 v itinium
r.rankin at qub.ac.uk
Sat May 18 04:04:36 PDT 2002
> You are comparing oranges to elephants. It appears that Athlons will not
> meet the needs of Mr Rankin due to the addressing limits that were mentioned.
> It sounds like the application will need large amounts of memory, fast
> floating point, a very optimized fortran compiler and possibly high I/O
> bandwidth which leads to Alpha Systems. I do not find comparing the cost of
> systems that will support the application vs the cost of unusable systems,
> very helpful.
Yes, it is a usable system that I am after. The budget is
about£150K and the user base have problems, probably the
majority, that will run well on p4 with 1-4GB memory. My own
impression is that I need some combination of system that will
cope with these small memory jobs and the larger memory jobs.
Some vendors have been telling me using the p4 with Linux will
enable the 4GB memory limit to be broken. If I read the
responses correctly this appears to be sales speak and not quite
The p4 + a number of itaniums was of interest as from price
performace angle. However again the correspondence on the list
implies that the compilers and job scheduling software may not
be as mature as my audience would expect. They would be looking
for a stable and easy to use envirnoment.
Is the that fact that most of their codes require double
precision floating point another indicator to move in the
direction of the usual suspects of 64bit chips.
Thanks to the list for their input.
> Best Regards,
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email: r.rankin at qub.ac.uk
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