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arXiv 1709.08765math.OCcs.DCcs.MA
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分散式Optimization中的网络拓扑与通信-计算权衡

Network Topology and Communication-Computation Tradeoffs in Decentralized Optimization

Angelia Nedić, Alex Olshevsky, Michael G. Rabbat

摘要:

在分散优化中,节点合作以最小化总体目标函数,该总体目标函数是每个节点私有目标函数的总和(或平均值)。算法将本地计算与所有节点或节点子集之间的通信交织在一起。受各种应用的启发-传感器网络中的分布式估计、海量数据集的拟合模型和多机器人系统的分布式控制,仅举几例-已经朝着具有理论性能保证的鲁棒、实用算法的发展取得了重大进展。本文概述了这一领域的最新工作。通常,收敛速率不仅取决于所涉及的节点的数量和期望的准确度水平,而且还取决于节点在其上通信的网络的结构和性质(例如,链路是有向的还是无向的、静态的还是时变的)。我们调查的国家的最先进的算法和他们的分析适合这些不同的情况下,突出了网络拓扑结构的作用。

英文摘要:

In decentralized optimization, nodes cooperate to minimize an overall objective function that is the sum (or average) of per-node private objective functions. Algorithms interleave local computations with communication among all or a subset of the nodes. Motivated by a variety of applications---distributed estimation in sensor networks, fitting models to massive data sets, and distributed control of multi-robot systems, to name a few---significant advances have been made towards the development of robust, practical algorithms with theoretical performance guarantees. This paper presents an overview of recent work in this area. In general, rates of convergence depend not only on the number of nodes involved and the desired level of accuracy, but also on the structure and nature of the network over which nodes communicate (e.g., whether links are directed or undirected, static or time-varying). We survey the state-of-the-art algorithms and their analyses tailored to these different scenarios, highlighting the role of the network topology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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