Basic HTML version of Foils prepared September 13 1999

Foil 53 HPcc as Multi-Tier Commodity Software Model

From Integration of Information Technology and Computational Science in Education and Research Computer Science Seminar -- August 27 1999. by Geoffrey C. Fox
Essential idea is consider a three tier model
  • Top tier is the client
  • Second tier are servers coordinated by object web commodity technologies such as the Web and CORBA and communicating via HTTP(Web), IIOP(CORBA), RMI or custom Java sockets.
  • JWORB is a nifty server built by NPAC which understands all object models
  • Use middle tier component/container model -- Enterprise Javabeans or equivalent technology
  • Third tier are services such as databases, parallel computers and scientific library engines (NetSolve)
Preserve the first two tiers as a high functionality commodity information processing system and confine HPCC to the third (lowest) tier.
  • MPI becomes the high performance "machine code" for message passing which you use if HTTP, IIOP or RMI have insufficient performance

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