Fault-tolerant computing: fundamental concepts

Nelson, Victor P.

doi:10.1109/2.56849

Cited by 249 publications

(84 citation statements)

References 11 publications

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“…The goal of fault-tolerance is to improve dependability in a system by enabling it to perform its intended functions in the presence of a given number of faults [21]. There exists several definitions of dependability [22].…”

Section: Reliability In Composite Servicesmentioning

confidence: 99%

A Proxy-Based Approach to Enhancing the Autonomic Behavior in Composite Services

Ezenwoye¹,

Sadjadi²

2008

JNW

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Abstract-Web services paradigm is allowing applications to electronically interact with one another over the Internet. The business process execution language (BPEL) takes this interaction to a higher level of abstraction by enabling the development of aggregate Web services. However, the autonomous and distributed nature of the partner services in an aggregate Web service present unique challenges to the reliability of the composite services. In this paper, we present an approach where existing BPEL processes are automatically instrumented, so that when one or more of their partner services do not provide satisfactory service (e.g., because of a service being overwhelmed, crashed, or because of a network outage), the request for service is redirected to a proxy Web service, where the failed or slow services are replaced by substitute services.

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Section: Reliability In Composite Servicesmentioning

confidence: 99%

A Proxy-Based Approach to Enhancing the Autonomic Behavior in Composite Services

Ezenwoye¹,

Sadjadi²

2008

JNW

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“…The critical task (CT) subsystem is implemented using dual-modular redundancy (DMR) and executes CTs in lockstep. Under lockstep execution, processors perform the same calculations on the same inputs in the same clock cycle, the results of which are compared regularly to detect when a failure, whether transient, intermittent, or permanent, has occurred [2]. The CT subsystem is functionally isolated from the non-critical task (NCT) subsystem (though in practice they may share a communication medium) to prevent NCTs from disrupting the execution of CTs.…”

Section: Introductionmentioning

confidence: 99%

Reducing the cost of redundant execution in safety-critical systems using relaxed dedication

Meyer

George

Calhoun

et al. 2011

2011 Design, Automation &Amp; Test in Europe

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Abstract-We introduce on-demand redundancy, a set of architectural techniques that leverage the tightly-coupled nature of components in systems-on-chip to reduce the cost of safety-critical systems. On-demand redundancy eases the assumptions that traditionally segregate the execution of critical and non-critical tasks (NCTs), making resources available for critical tasks at potentially arbitrary points in both space and time, and otherwise freeing resources to execute non-critical tasks when critical tasks are not executing. Relaxed dedication is one such technique that allows non-critical tasks to execute on critical task resources. Our results demonstrate that for a wide variety of applications and architectures, relaxed dedication is more cost-effective than a traditional approach that employs dedicated resources executing in lockstep. Applied to dual-modular redundancy (DMR), relaxed dedication exposes 73% more NCT cycles than traditional DMR on average, across a wide variety of usage scenarios.

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“…Self-healing systems can be seen in the context of work on fault-tolerant computing [88] and resilience [29], where the goal is to enable a system to maintain its intended function even when facing faults, and recovery oriented computing [89] which contributes by providing dependable internet services.…”

Section: Surveymentioning

confidence: 99%

Self-healing and self-repairing technologies

Frei

McWilliam

Derrick

et al. 2013

Int J Adv Manuf Technol

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This article reviews the existing work in selfhealing and self-repairing technologies, including work in software engineering, materials, mechanics, electronics, MEMS, self-reconfigurable robotics, and others. It suggests a terminology and taxonomy for self-healing and selfrepair, and discusses the various related types of other self-* properties. The mechanisms and methods leading to selfhealing are reviewed, and common elements across disciplines are identified.

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Fault-tolerant computing: fundamental concepts

Cited by 249 publications

References 11 publications

A Proxy-Based Approach to Enhancing the Autonomic Behavior in Composite Services

A Proxy-Based Approach to Enhancing the Autonomic Behavior in Composite Services

Reducing the cost of redundant execution in safety-critical systems using relaxed dedication

Self-healing and self-repairing technologies

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