Fault/failure analysis of the Tandem NonStop-UX operating system

Iyer, Ravishankar K.; Hsueh, Mei-Chen; Lee, I.

doi:10.1109/dasc.1996.559205

Cited by 1 publication

(2 citation statements)

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“…Architecture of NonStop systems includes dual processors: primary and backup processors. Primary sends checkpoints, when primary processor fails, backup becomes primary, rolls back to the last checkpoint, and picks up from that point [29], [30], [31], [32], [33].…”

Section: R Edundant Configurations Have Been Used In Researchmentioning

confidence: 99%

“…One way of achieving the fault tolerance and increasing the reliability is to deploy a dual architecture, which is a widely used method of supporting the fault tolerance of various systems [15], [17], [19], [20], [21], [23], [27], [28], [29], [30], [31], [32], [33], [36], [37]. The fault tolerance of dual architectures is frequently determined by self-testing techniques and diagnostic routines.…”

Section: R Edundant Configurations Have Been Used In Researchmentioning

confidence: 99%

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Recovery Device for Real-Time Dual-Redundant Computer Systems

Samet

2011

IEEE Trans. Dependable and Secure Comput.

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This paper proposes the design of specialized hardware, called Recovery Device, for a dual-redundant computer system that operates in real-time. Recovery Device executes all fault-tolerant services including fault detection, fault type determination, fault localization, recovery of system after temporary (transient) fault, and reconfiguration of system after permanent fault. The paper also proposes the algorithms for determination of fault type (whether the fault is temporary or permanent) and localization of faulty computer without using self-testing techniques and diagnosis routines. Determination of fault type allows us to eliminate only the computer with a permanent fault. In other words, the determination of fault type prevents the elimination of nonfaulty computer because of short temporary fault. On the other hand, localization of faulty computer without using self-testing techniques and diagnosis routines shortens the recovery point time period and reduces the probability that a fault will occur during the execution of fault-tolerant procedure. This is very important for real-time fault-tolerant systems. These contributions bring both an increase in system performance and an increase in the degree of system reliability.

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