| J. H. Wensley, L. Lamport, J. Goldberg, M. W. Green, K. N. Levitt, P. M. Melliar-Smith, R. E. Shostak, and C. B. Weinstock. SIFT: Design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1255, 1978. |
....of the system as a whole revolves around the dependability of that one voter. Current distributed voting schemes assume that there is a sufficiently low probability of failure during that last stage that this doesn t become a problem. This voting methodology has had several embodiments ([3, 4, 5, 6]) in the development of fault tolerant computing. More recently, distributed voting has been used for fault diagnosis in linear processor arrays ( 7] where, in the absence of a centralized voter, the array elements share error flags stemming from output comparisons performed between connected ....
Wensley, J., "SIFT: The Design and Analysis of a Fault-Tolerant Computer for Aircraft Control," Proceedings of the IEEE, Vol. 66, October 1978, pp. 1240-1255.
....of California, San Diego, Department of Computer Science and Engineering, E mail: marzullo cs.ucsd.edu 1 Introduction Fault tolerant algorithms are often designed under the assumption that no more than t out of n processes or components can fail. This approach was pioneered by the SIFT project [22], and has since been widely applied to the design of algorithms for real critical systems, e.g. air trac control [6] other highly available services like le servers [15] and so on. It is such a common assumption that most fault tolerant algorithms found in the literature today adopt it without ....
J. H. Wensley, L. Lamport, J. Goldberg, M. W. Green, K. M. Levitt, P. M. Melliar-Smith, R. E. Shostak, and C. B. Weinstock. SIFT: design and analysis of a fault-tolerant computer for air trac control. IEEE, 66(10):1240-1255, Oct. 1978.
....failures, rather than the level of perceived threat. When a persistent fault is diagnosed, the faulty unit is isolated, repaired and then reinserted. In most cases, this delay is made as short as possible to maintain a similar level of redundancy for the whole mission. Architectures such as SIFT [33] and GUARDS [21] assign di#erent levels of redundancy to concurrent tasks according to their criticality. In other fault tolerant architectures such as Delta 4 [22] and FRIENDS [8] di#erent redundancy levels and techniques are assigned according to fault assumptions rather than criticality. In ....
J. Wensley, L. Lamport, J. Goldberg, M. Green, K. Levitt, P. Melliar-Smith, R. Shostack, and C. Weinstock. SIFT: the design and analysis of a fault-tolerant computer for aircraft control. Proc. IEEE, 66:1240--1255, Oct. 1978.
.... is synchronous and when #### if the system is asynchronous extended with a failure detector of the class [2, 11] The use of the # of # assumption dates back to the earliest work on fault tolerant computing [22] It was first applied to distributed coordination protocols in the SIFT project [23] which designed a fly by wire system. The reliability of systems like this is a vital concern, and using the # of # assumption allows one to represent the probabilities of failure in a simple manner. For example, if each process has a probability # of being faulty, and processes fail ....
J. H. Wensley, M. W. Green, K. N. Levitt, and R. E. Shostak. SIFT: Design and Analysis of a Fault-Tolerant Computer for Aircraft Control. In 2nd IEEE International Conference on Software Engineering, pages 458--469, 1976.
.... failures in [Lamport 84] These various state machine implementations were first characterized using the Agreement and Order requirements and a stability test in [Schneider 85] The state machine approach has been used in the design of significant fault tolerant process control applications [Wensley et al. 78] It has also been used in the design of distributed synchronization including read write locks and distributed semaphores [Schneider 80] input output guards for CSP and conditional Ada SELECT statements [Schneider 82] and in the design of a failstop processor approximation using processors ....
Wensley, J., et al. SIFT: Design and Analysis of a Fault-Tolerant Computer for Aircraft Control. Proc. IEEE 66, 10 (Oct. 1978), 1240-1255. -30-
....of implementing fail stop processors is established by this argument, the practicality is not. However, recent work in the implementation of highly reliable processors gives reason to believe that it is indeed practical to implement fail stop processor approximations. Both FTMP [10] and SIFT [26] could be configured to behave like a collection of fail stop processor approximations; both employ replicated processor and memory units. Redundancy can also be introduced at lower levels in a variety of ways [1, 25] The level at which redundancy is applied is an important issue and is treated ....
WENSLEY, J., WENSKY, J. H., LAMPORT, L., GOLDEER(, J., GREEN, M., LEVITT, K. N., MELLIARSMITH, P.M., SOSTAK, R. E., AD WSOC, C.B. SIFT: Design and analysis of a fault- tolerant computer for aircraft control. Proc. IEEE 66, 10 (Oct.
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J. H. Wensley, L. Lamport, J. Goldberg, M. W. Green, K. N. Levitt, P. M. Melliar-Smith, R. E. Shostak, and C. B. Weinstock. SIFT: Design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1255, 1978.
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J. Wensley, P. M. Melliar-Smith, et al, "SIFT: Design and analysis of a fault-tolerant computer for aircraft control," Proceedings of the IEEE, vol. 66, no. 10 (October 1978), pp. 1240-1255.
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J. Wensley, P. M. Melliar-Smith, et al, "SIFT: Design and analysis of a fault-tolerant computer for aircraft control," Proceedings of the IEEE, vol. 66, no. 10 (October 1978), 1240-1255.
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J. H. Wensley, L. Lamport, J. Goldberg, M. W. Green, K. N. Levitt, P. M. Melliar-Smith, R. E. Shostak, and C. B. Weinstock. SIFT: Design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1255, Oct. 1978.
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J. H. Wensley, L. Lamport, J. Goldberg, M. W. Green, K. N. Levitt, P. M. Melliar-Smith, R. E. Shostak, and C. B. Weinstock. SIFT: Design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1255, Oct. 1978.
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J. Wensley et al. SIFT: Design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1254, October
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J H Wensley et. al., "SIFT: Design and Analysis of a Fault-Tolerant Computer for AirTraffic Control", Proceedings of the IEEE, 66(10), pp. 1240-55, Oct. 1978.
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Wensly, J. H., Lamport, L., Goldberg, J., Levitt, K. N., Melliar-Smith, P. M., Shostak, R. E., Weinstock, C. B.: SIFT : Design and Analysis of fault tolerant computer control for aircraft. In: Proceedings of IEEE 66(10):1240--1255 (1978)
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J. H. Wensley, L. Lamport, J. Goldberg, M. W. Green, K. N. Levitt, P. M. MelliarSmith, R. E. Shostak, C. B. Weinstock, "SIFT: Design and Analysis of a FaultTolerant Computer for Aircraft Control," Proceedings of the IEEE, Vol.66, No.11, November 1978, pp.1240--1255.
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J. Wensley, \SIFT: Design and Analysis of a Fault-Tolerant Computer for Aircraft Control," in Proceedings of the IEEE, vol. 66, pp. 1240-1255, October 1978.
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J.H. Wensley et al. SIFT design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1255, October 1978.
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J. Wensley, \SIFT: Design and Analysis of a Fault-Tolerant Computer for Aircraft Control," in Proceedings of the IEEE, vol. 66, pp. 1240-1255, October 1978.
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45 J.H. Wensley, L. Lamport, J. Goldberg, M.W. Green, K.N. Levitt, P.M. Melliar-Smith, R.E. Shotak, and C.B. Weinstock. SIFT: The Design and Analysis of a Fault-Tolerant Computer for Aircraft Control. Proc. IEEE, 66(10):1240--1255, 1978.
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J. Wensley, "SIFT: Design and Analysis of a Fault-Tolerant Computer for Aircraft Control," in Proceedings of the IEEE, vol. 66, pp. 1240--1255, October 1978.
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J.H. Wensley et al. SIFT design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240-1255, October 1978.
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J.H. Wensley, L. Lamport, J. Goldberg, M.W. Green, K.N. Levitt, P.M. Melliar-Smith, R.E. Shostack and C.B. Weinstock. "SIFT: The Design and Analysis of a FaultTolerant Computer for Aircraft Control". In Proceedings of the IEEE. Vol. 66, Nr. 10, Oct. 1978, pages 1240--1255.
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Wensley, J. H., Lamport, L., Goldberg, J., Green, M. W., Levitt, K. N., Melliar-Smith, P. M., Shostak, R. E., und Weinstock, C. B.: SIFT: Design and analysis of a faulttolerant computer for aircraft control. Proc. IEEE. 66(10):1240--1255. Oct. 1978.
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J. H. Wensley et al. SIFT: Design and analysis of a fault-tolerant computer for aircraft control. Proceedings of the IEEE, 66(10):1240--1255, October
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J.H. Wensley, L. Lamport, J. Goldberg, M.W. Green, K.N. Levitt, P.M. Meliar-Smith, R.E. Shostak, and C.B. Weinstock, "SIFT: Design and Analysis of a Fault-Tolerant Computer for Aircraft Control, " Proc. IEEE, vol. 66, no. 10, pp. 1,240-1,255, Oct. 1978.
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