To support the large and various applications generated by the Internet of Things (IoT), Fog Computing was introduced to complement the Cloud Computing and offer Cloud-like services at the edge of the network with low latency and real-time responses. Large-scale, geographical distribution, and heterogeneity of edge computational nodes make service placement in such infrastructure a challenging issue. Diversity of user expectations and IoT devices characteristics also complicate the deployment problem. This article presents a survey of current research conducted on Service Placement Problem (SPP) in the Fog/Edge Computing. Based on a new classification scheme, a categorization of current proposals is given and identified issues and challenges are discussed.

中文翻译：

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雾和边缘计算中的服务放置问题概述

为了支持物联网 (IoT) 产生的各种大型应用程序，引入了雾计算来补充云计算，并在网络边缘提供低延迟和实时响应的类云服务。边缘计算节点的大规模、地理分布和异构性使得在此类基础设施中放置服务成为一个具有挑战性的问题。用户期望和物联网设备特性的多样性也使部署问题复杂化。本文介绍了对雾/边缘计算中服务放置问题 (SPP) 的当前研究的调查。基于新的分类方案，给出了当前提案的分类，并讨论了已识别的问题和挑战。