HTML version of Scripted Foils prepared May 6 97

Foil 15 HPCC Software issues

From The Use of Web Technologies (at NPAC) in HPCC Collaboration and Education Trip to Digital Corporation in New Hampshire -- May 8 97. by Geoffrey C. Fox *

1 We can distinguish Decomposition and Integration
2 Decomposition is performed by an HPF or other Parallelizing compiler; or by a user writing a Fortran + Message Passing code "by hand"
3 MPI integrates decomposed parts together with high bandwidth latency constraints
4 Systems such as AVS integrate larger modules together and much of "software engineering" (modular style of programming) involved with this
5 Web is a powerful integration model suitable for large coarse modules with modest latency and sometimes modest bandwidth requirements
  • naturally "integrate" data(bases), people, computation together
6 Collaboration, computational steering, multidisciplinary science are all integration and not decomposition problems!

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