Advances in High Performance Computing by Ashutosh Tiwary, Janusz Kowalik, Bob Abarbanel, John Lixvar,

By Ashutosh Tiwary, Janusz Kowalik, Bob Abarbanel, John Lixvar, Vish Jumani (auth.), Lucio Grandinetti, Janusz Kowalik, Marian Vajtersic (eds.)

Most of the papers during this quantity have been offered on the NATO complex study Workshop excessive functionality Computing: expertise and alertness, held in Cetraro, Italy from 24 to 26 of June, 1996. the most goal of the Workshop was once to debate a few key clinical and technological advancements in excessive functionality computing, determine major tendencies and defme fascinating learn ambitions. the amount constitution corresponds, commonly, to the description of the workshop technical schedule: basic thoughts and rising platforms, software program know-how, algorithms and functions. one of many Workshop thoughts was once an attempt to increase somewhat the scope of the assembly from scientific/engineering computing to enterprise-wide computing. The papers on functionality and scalability of database servers, and Oracle DBMS replicate this test we are hoping that once interpreting this number of papers the readers can have a good suggestion approximately a few very important learn and technological concerns in excessive functionality computing. we want to supply our because of the NATO clinical and Environmental Affairs department for being the important sponsor for the Workshop. additionally we're happy to recognize different associations and corporations that supported the Workshop: ecu Union: eu fee DGIII-Industry, CNR: nationwide study Council of Italy, collage of Calabria, Alenia Spazio, Centro Italiano Ricerche Aerospaziali, ENEA: Italian nationwide corporation for brand spanking new know-how, strength and the surroundings, Fujitsu, Hewlett Packard-Convex, Hitachi, NEC, Oracle, and Silicon Graphics-Cray study. Editors January 1997 vii record OF individuals Ecole Nonnale Su¢rieure de Lyon, 69364 Abarbanel. Robert M.

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The Stanford Flash Multiprocessor. Proceedings of the 21st International Symposium on Computer Architecture. pp 18-27. April 1994. [6] P. Stenstrom. T. Joe and A. Gupta. Comparative Performance Evaluation of the Cache-Coherent NUMA and COMA Architectures. Proceedings of the Symposium on Architectural Support for Programming Languages and Operating Systems (ASPLOS). 1992. [7] T. L. Hennessy. Evaluating the Memory Overhead Required for COMA Architectures. 1994. [8] M. Stonebraker. The Case for Shared Nothing.

The explanation for June 1995 was the big number of SGI PowerChallenge and IBM SP2 systems entering the list at this time. This was a clear sign for the change in the technology used by the HPC community. Near the end of 1996, a new generation of systems such as the Cray T3E, Fujitsu VPP700 and SGI Origin are the major reason for the increase in the replacement rate. 620 Replaced Systems 83 121 115 216 144 137 183 143 Table 2: The replacement rate defined as number of systems omitted because of their performance being too small.

This requires that programmers rewrite their programs to explicitly manage all data communication. In addition, performance often suffers since the overhead of passing a message is measured in tens to hundreds of microseconds; which is tens of thousands of instructions on a modem microprocessor. These performance and programming overheads have limited the use of these machines to a small user base who could justify the effort to recode their application in return for the high aggregate computing power of a large MPP.

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