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The particular attraction of hardware voting is that a high degree of fault-tolerance should be achievable in a largely software transparent manner and with a minimal performance penalty. The proposals are particularly applicable to systems using multiple transputers, allowing both the natural parallelism of the application and the redundancy demanded by… (More)
This paper describes the RaFT simulation environment, a software tool for use in the development of hardware-based fault-tolerant systems using transputers. The concepts behind the RaFT project are presented, together with an overview of previous work into the design of a fault-tolerant transputer node. The simulation environment described seeks to emulate… (More)
This paper introduces the concept of process evacuation, a technique for moving processes between processing elements in the presence of faults. The technique forms part of the RaFT support environment, a framework for building fault-tolerant applications on transputers. The paper describes the layered structure of the support environment and how process… (More)
This paper describes how an existing application may be integrated into the RaFT system to provide enhanced fault-tolerance. Some fault-tolerance is provided transparently using hardware voting, but the RaFT system is in principle able to do more by exploiting reconfiguration. The example application is a simplified railway signalling system and a pipeline… (More)
List of range countries by populations, where the plan is to be implemented and national organizations in each country involved in the preparation of the action plan: Geographical Scope The Spoonbill has a wide distribution from Europe to East Asia. Its distribution is partly included within the geographical range of the actions of AEWA. The present Action… (More)
"A wonderful son of whom I am very proud": the mother of a 14 year old boy with attention deficit/hyperactivity disorder describes her experiences.
The paper describes the structure of an experimental fault-tolerant transputer architecture (EFTA) based on industry standard transputer modules. The architecture represents one possible implementation of a reliable processing element defined by the Reconfiguration and Fault-Tolerance (RaFT) project. The paper presents an overview of fault protection… (More)