Author: Robert Hyatt
Date: 09:52:13 07/11/03
Go up one level in this thread
On July 10, 2003 at 23:18:30, Vincent Diepeveen wrote: >On July 10, 2003 at 16:36:50, Robert Hyatt wrote: > >>>You show up with a cray supercomputer and i may only bring something my hands >>>can carry :) >> >>Feel free to do so. I'll take a T932 over _anything_ you can carry by >>hand, no questions asked. > >The Cray the NWO owned a bunch of years ago was replaced by the 1024 processor >TERAS machine in 2000. Please read what I wrote. "over anything you can carry by hand..." I think that is pretty clear. And you aren't going to carry a 1024 processor TERRA by hand. > >It now is upgraded to 1440 processors. That is a new machine with 416 processors >is added to it. Most jobs they found out at the TERAS were either up to 8 cpu's >or up to 32 cpu's. > >>>I'm not sure about the microprocessor designs, we can ask AMD and intel after >>>it. Apple doesn't produce microprocessors at all. They use IBM processors >>>nowadays and before IBM they used Motorola. >> >>Apple produces _machines_. They do circuit layout and testing on a Cray. > >That's funny because i do not own a single apple product AFAIK. My sister does >though. That's typical however as she is a graphics artist and VJ and makes a >small chance to get our first female prime minister :) > >>> >>>However about the weather forecasting guess why the 1024 processor from december >>>2002 till end of gulfwar II was overloaded with weather guys :) >>> >>>It was like this. On average 400 cpu's got used up until december. Then suddenly >>>a dang at the machine. When i checked out which dudes prevented me from doing a >>>few tests, i knew it was going to be war soon. >>> >>>Weather guys LOVE memory. For them vector processing isn't so important as is a >>>huge memory. >> >>They are related. Vector processing lets you _use_ "huge memory" efficiently. > >Yes put that in between "", see below. > >>> >>>I remember a weather guy some 7 years ago who as a selfemployed managed to lay >>>his hands on an outdated Sun machine with 2 processors. He was in the skies so >>>happy. I asked him then why he was so happy with those dusted cpu's and he >>>explained that he didn't care for the cpu's but for the 2 GB memory inside :) >> >>Cray's don't come with 2 gigs of memory. The T90 typically has 16-32 gigs. > >that's funny because that poor Cray T916 which was replaced by the TERAS, it has >1 terabyte since 2000 already. It has soon nearly 2. Different machine. You won't do this on your Terra: double x [1000][1000][1000]; and then do anything useful with it. That is the power of the Cray, to handle large arrays _and_ stomp through them impossibly quick without regard to NUMA issues. > >The climate job that runs now at the TERAS needs around 350000 cpu hours and 10 >terabyte of i/o, so 1 TB memory is more than welcome for it. > >When it would run on the old Cray T916 (strong oxens) that would take 150 years >it says. > >Best regards, >Vincent
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