No abstract

The World Wide Web (WWW) server at the National Center for Supercomputing Applications (NCSA) is one of the most heavily accessed WWW servers in the world. This server is based on a collection of cooperating hosts that share a common le system. To increase our understanding of how users access this server and to provide a basis for assessing server and system software optimizations, we analyzed NCSA's server logs for multiple weeks during a ve month period. This paper describes the server's architecture, presents the results of our access pattern analysis, and discusses the implications for server design and extensibility. An extended version of this paper has been submitted for possible publication in the proceedings of Supercomputing '95.

The ThinkingMachines CM-5

Recently,there has been considerable interest in high performance networks.To help evaluate the highspeed-net working-related performance of mpercomputers, we selected a computational neuroscience simulation program that ha~a bandwidth requirement in ezceas of 1.5 Gigabita per second. The simulation runs on the Thinking Machines CM-2 and the target visualization engine is the Convez C3880. We benchmarked the various operation required to tmn~mit data jiom the CM-2 to the Convez C3880. Our results show that the pamllel to aem"al data tmnaformation opemtion on the CM-2 and the network inter face~are the major bottlenecks.