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<p><b>Abstract</b>—This paper proposes a hierarchical error detection framework for a Software Implemented Fault Tolerance (SIFT) layer of a distributed system. A four-level error detection hierarchy is proposed in the context of Chameleon, a software environment for providing adaptive fault-tolerance in an environment of commercial off-the-shelf (COTS) system components and software. The design and implementation of a software-based distributed signature monitoring scheme, which is central to the proposed four-level hierarchy, is described. Both intralevel and interlevel optimizations that minimize the overhead of detection and are capable of adapting to runtime requirements are proposed. The paper presents results from a prototype implementation of two levels of the error detection hierarchy and results of a detailed simulation of the overall environment. The results indicate a substantial increase in availability due to the detection framework and help in understanding the trade-offs between overhead and coverage for different combinations of techniques.</p>
Software implemented fault tolerance, hierarchical error detection, distributed systems, data and control signatures, speculative execution.
Zbigniew Kalbarczyk, Saurabh Bagchi, Ravishankar K. Iyer, Balaji Srinivasan, Keith Whisnant, "Hierarchical Error Detection in a Software Implemented Fault Tolerance (SIFT) Environment", IEEE Transactions on Knowledge & Data Engineering, vol. 12, no. , pp. 203-224, March/April 2000, doi:10.1109/69.842263
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