A fault-tolerant architecture for resilient interactive systems

Camille Fayollas, Philippe A. Palanque, J. Fabre, D. Navarre, Eric Barboni, Martin Cronel, Y. Déléris
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Abstract

Research contributions to improve interactive systems reliability as, for now, mainly focused towards fault occurrence prevention by removing software bugs at development time. However, Interactive Systems complexity is so high that whatever efforts are deployed at development time, faults and failures occur at operation time. Root causes of such failures may be due to transient hardware faults or (when systems are used in high atmosphere) may be so called "natural faults" triggered by alpha particles in processors or neutrons from cosmic radiations. This paper proposes an exhaustive identification of faults to be handled in order to improve interactive systems reliability. As currently no research has been carried out in the field of interactive systems to detect and remove natural faults, this paper proposes a software architecture providing fault-tolerant mechanisms dedicated to interactive systems. More precisely, the paper how such architecture addresses the various component of interactive applications namely widgets, user application and window manager. These concepts are demonstrated through a case study from the domain of interactive cockpits of large civil aircrafts.
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弹性交互系统的容错架构
目前,对提高交互系统可靠性的研究主要集中在通过在开发阶段消除软件错误来防止故障的发生。然而,交互式系统的复杂性是如此之高,以至于无论在开发时部署了什么努力,错误和失败都会在操作时发生。此类故障的根本原因可能是由于瞬态硬件故障,或者(当系统在高大气中使用时)可能是由处理器中的α粒子或宇宙辐射中的中子触发的所谓“自然故障”。为了提高交互系统的可靠性,本文提出了一种详尽的故障识别方法。由于目前在交互系统领域还没有对自然故障的检测和去除进行研究,本文提出了一种为交互系统提供容错机制的软件体系结构。更准确地说,本文讨论了这种体系结构如何处理交互式应用程序的各种组件,即小部件、用户应用程序和窗口管理器。这些概念通过大型民用飞机交互式驾驶舱领域的案例研究进行了论证。
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