David Powell's A Generic Fault-Tolerant Architecture for Real-Time PDF

By David Powell

ISBN-10: 1441948805

ISBN-13: 9781441948809

ISBN-10: 1475733534

ISBN-13: 9781475733532

The layout of desktops to be embedded in severe real-time purposes is a posh activity. Such platforms mustn't ever purely warrantly to fulfill difficult real-time time cut-off dates imposed by way of their actual atmosphere, they need to warrantly to take action dependably, regardless of either actual faults (in undefined) and layout faults (in or software). A fault-tolerance process is crucial for those promises to be commensurate with the security and reliability specifications of many lifestyles- and mission-critical functions. This publication explains the motivations and the result of a collaborative project', whose aim used to be to seriously reduce the lifecycle expenditures of such faultĀ­ tolerant structures. The end-user businesses partaking during this venture already set up fault-tolerant structures in severe railway, house and nuclear-propulsion purposes. even though, those are proprietary structures whose architectures were adapted to satisfy domain-specific standards. This has ended in very expensive, rigid, and infrequently hardware-intensive ideas that, by the point they're constructed, confirmed and licensed to be used within the box, can already be out-of-date by way of their underlying and software program technology.

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Extra resources for A Generic Fault-Tolerant Architecture for Real-Time Dependable Systems

Sample text

Following the comprehensive development model described in [Laprie et af. 1995], the validation strategy is closely linked to the design solutions and the proposed generic architecture. The validation environment that supports the strategy includes components for verification and evaluation, using both analytical and experimental techniques . 3 illustrates the relationship between the components of the validation environment, and their interactions with the architecture development environment.

The above considerations are for the general case, where no assumptions are made on the way the nodes are interconnected together, apart from the fact that they are indeed fully interconnected. 4). We can therefore practically exclude the case of a Byzantine clock, and thus consider only convergence-averaging algorithms. Indeed, when a given node sends a message, the message is physically broadcast to all other nodes by hardware. Thus, for each emission, Byzantine faults can occur only during transmission or reception of messages.

Both for cost-effectiveness and flexibility, the fault injection environment is based on the software-implemented fault injection (SWIFI) technique [Hsueh et al. 1997]. This also allows tests to be conducted more efficiently, since: a) a limited number of errors can simulate the consequences of a large number of faults, b) it is less likely that the injected error fails to exercise the dependability mechanisms. Two main levels of injection are considered, according to whether the targeted mechanisms are implemented by the ICN-manager board or by the intra-channel processors.

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A Generic Fault-Tolerant Architecture for Real-Time Dependable Systems by David Powell


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