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Resilience in Large Scale Distributed Systems

机译:大型分布式系统的弹性

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摘要

Distributed systems are comprised of multiple subsystems that interact in two distinct ways: (1) physical interactions and (2) cyber interactions; i.e. sensors, actuators and computers controlling these subsystems, and the network over which they communicate. A broad class of cyber-physical systems (CPS) are described by such interactions, such as the smart grid, platoons of autonomous vehicles and the sensorimotor system. This paper will survey recent progress in developing a coherent mathematical framework that describes the rich CPS “design space” of fundamental limits and tradeoffs between efficiency, robustness, adaptation, verification and scalability. Whereas most research treats at most one of these issues, we attempt a holistic approach in examining these metrics. In particular, we will argue that a control architecture that emphasizes scalability leads to improvements in robustness, adaptation, and verification, all the while having only minor effects on efficiency – i.e. through the choice of a new architecture, we believe that we are able to bring a system closer to the true fundamental hard limits of this complex design space.
机译:分布式系统由多个子系统组成,这些子系统以两种不同的方式进行交互:(1)物理交互和(2)网络交互;即控制这些子系统的传感器,执行器和计算机,以及它们之间进行通信的网络。此类交互描述了广泛的网络物理系统(CPS),例如智能电网,自动驾驶汽车排和感觉运动系统。本文将调查开发一个连贯的数学框架的最新进展,该框架描述了丰富的CPS“设计空间”,其中包含基本限制以及效率,鲁棒性,适应性,验证和可扩展性之间的折衷。尽管大多数研究最多只处理其中一个问题,但我们尝试采用整体方法来检查这些指标。特别是,我们将争辩说,强调可伸缩性的控制体系结构会导致健壮性,自适应性和验证性的提高,而同时对效率的影响却很小-即通过选择新的体系结构,我们相信我们能够使系统更接近此复杂设计空间的真正基本硬性极限。

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