Author: Vincent Diepeveen
Date: 04:53:57 08/08/03
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On August 07, 2003 at 17:45:24, Jorge Pichard wrote: >http://www.cpuplanet.com/news/article.php/2242421 putting a sporthal full of dual xeon or dual opteron machines is not very difficult for a government of course. Also very cheap. The question is how they connect the nodes to each other. That's the pricey part of a supercomputer. Then they need to get to work 4 more things to call it a supercomputer IMHO. First of all OpenMP and MPI. Secondly an OS that without crashing runs at it and i bet that default (experimental) NUMA linux kernel will go only to 64 processors so i wonder how you can call this worlds largest supercomputer anyhow if each accessible node is just 64 cpu's which right now is the maximum linux can work with. Third is they need a huge bandwidth and fast latency and in such a way that we can work with more than 64 processors at a time. We can put in of course 100mbit network cards and 2 routers or so then we have to work 32 cpu's. but suppose we want to run a job of 500 cpu's or something similar and we cannot let each cpu communicate fast with the other cpu's. You still want to call that a supercomputer? Because at the internet they do, but i wouldn't. Now the only good thing we know is that the clusters of IBM usually are not so bad.
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