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Benchmarks of a Weather Forecasting Research Model on Superclusters

Benchmarks of a Weather Forecasting Research Model on Superclusters. Daniel B. Weber, Ph.D. Research Scientist CAPS/University of Oklahoma February 14, 2001. LL=UNM/Los Lobos 512 PIII/733 IBM RR=UNM/Road Runner 128 PII/450 AltaCluster NT=NCSA 128 PIII/550 NT Cluster

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Benchmarks of a Weather Forecasting Research Model on Superclusters

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  1. Benchmarks of a Weather Forecasting Research Model on Superclusters Daniel B. Weber, Ph.D. Research Scientist CAPS/University of Oklahoma February 14, 2001

  2. LL=UNM/Los Lobos 512 PIII/733 IBM RR=UNM/Road Runner 128 PII/450 AltaCluster NT=NCSA 128 PIII/550 NT Cluster TCS=Terascale Computing System/PSC 256 Alpha EV-67

  3. INTEL Benchmark Summary • 20% increase in compute time for 2proc/node configuration on Intel Based systems due to bus competition • File system very slow on Intel based systems without fiber channel • File system is a weak link (UNM-LL) • 5.5mb/sec sustained for 480 2proc/node tests writing 2.1mb files from 8 separate processors simultaneously • passing through linux file server not r6000

  4. ALPHA Benchmark Summary • Alpha EV-67 (TCS) is 5 times faster computationally than the INTEL PIII/733 • Alpha (TCS) file system is very slow at times, need to look at the configuration, shows potential for very fast transfer rates • MPI overhead for a 256 processor TCS job is on the order of 15%, very good network performance.

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