Tandem builds single-fault-tolerant computer systems. At the hardware level, the system is designed as a loosely coupled multi-processor with fail-fast modules connected via dual paths. It is designed for online diagnosis and maintenance. A range of CPUs may be inter-connected via a hierarchical fault-tolerant local network. A variety of peripherals needed for online transaction processing are ...

This paper presents a path-based fault-injection approach to increase the eeciency of computer system dependability evaluation. Our approach utilizes knowledge about the execution path to ensure that injected faults are activated. The control ow associated with each path is analyzed to determine the faults that would be activated by that path. By selecting a set of paths that covers a signiican...

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Paper discusses principles of the redundancy classification for the design of fault tolerant computer systems. The basic functions of classification: definitive, characteristic and predictive are presented. Shown that proposed classification of redundancy posses a substantial predictive power. Proposed classification suits for the analysis of roles of hardware and software to achieve fault tole...

This paper describes the development of an Advanced Research Integrated Avionics (ARIA) system for a research effort at West Virginia University (WVU) focusing on the design of fault-tolerant control systems toward improving aviation safety. The system seeks to improve upon WVU’s existing avionics system by incorporating more functionality, flexibility, and computational performance while impos...

The aim of our research is to develop a distributed system platform that supports a variety of tasks. Currently, we are implementing Internet applications on the system, including a service redirector, firewall, and web applications. These applications have different levels of dependability requirements. Depending on their criticality, a single task may execute on one or more computer nodes. So...

Computer-based control of refrigeration chambers must be fault tolerant because of their critical mission. Poor or no response in case of wrong operation of the system may result in the loss of the products. Achieving fault tolerance involves all elements in the control system, including microcontrollers and the interconnection network. This work presents a practical architecture for distribute...