Pub Date : 1900-01-01DOI: 10.1109/ISORC.1999.776383
T. Uslander
The mission of the EU-funded OPERA (Operator Training by Distributed Real-Time Simulations) project (ESPRIT Project No. 24950) is the training of operators in the chemical industry by means of flexible and configurable simulation applications running in a cost-effective IT environment. This paper outlines how the problem of real-time operation combined with the requirement for high-performance computing may be solved in a standard environment. The OPERA system provides a way to integrate hybrid simulation models and is highly scalable. It runs either on a single computer or on a multiprocessor LAN cluster. OPERA's results appear to be useful for solving many problems, far beyond the initial requirements in the domain of distributed simulation.
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Pub Date : 1900-01-01DOI: 10.1109/ISORC.1999.776370
E. de Jong
Designing distributed real time systems is an intricate and not very well structured task. Besides complex functional capabilities, these systems often require high standards on real time performance, reliability, and availability. Though architectures like CORBA hide the distributed infrastructure of the underlying platform from the application software, supporting real time performance and fault tolerant services remains a complex design problem. The paper presents an architecture for distributed real time systems in which fault tolerance is supported by transparent replication of mission critical components. The architecture is based on a shared data space through which components interact. The architecture is supported by middleware that provides a distributed implementation of the shared data space. The implementation is based on a light weight asynchronous communication protocol that is able to deliver real time performance.
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