Basic HTML version of Foils prepared 12 May 1996

Foil 50 Computational Chemistry at NPAC

From General Collection of Foils for CRPC Annual Meeting CRPC Annual Meeting -- 14-17 May 1996 Argonne. by Geoffrey C. Fox


http://www.npac.syr.edu/users/bernhold/comp_chem
Use of modeling in chemistry has exploded
in recent years, driving the push for larger
and more accurate calculations to simulate
"real world" chemical phenomena.
Chemistry applications range in cost from N2 to N4, N6, and higher (N proportional to the size of the molecule). Can be both CPU- and memory-intensive.
Interested both in legacy and "HPCC-designed" applications
  • Existing codes are often quite large (100,000+ lines) and embody perhaps decades of effort -- not rewritten lightly!
  • Many legacy codes can be retrofitted with simple parallel algorithms that allow reasonable efficiency for small-scale parallelism on local resources (including NOWs).
  • Large-scale calculations require parallel computing using a distributed-data model. Naive parallel algorithms are generally insufficient. Requires codes constructed from scratch.



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