This paper aims to propose a deployment solution for Content-Centric Delivery Networks (C-CDN) based on the SDN technology in an IoT-like environment. To meet today’s network requirements in terms of reliability, scalability and performance and to match the specific IoT needs, the SDN architecture needs to be physically-distributed, but logically-centralized. The key idea is to consider the knowledge plane natively provided by the SDN controllers to build Information-Centric Networking (ICN) applications (e.g. Video distribution services). To achieve this, we put forward an adaptive and continuous consistency model for the distributed SDN controllers in large-scale deployments. More specifically, we propose to turn the standard replication technique into a scalable and intelligent replication strategy following Quorum-replicated consistency. That strategy uses the read and write Quorum parameters as adjustable control knobs for a fine-grained consistency level tuning. The main purpose is to find at run-time appropriate partial Quorum configurations that achieve, under changing network and workload conditions, balanced trade-offs between the SDN application’s continuous performance and consistency requirements. When compared to ONOS’s static consistency model, our approach which was implemented for a Content-Centric Delivery Network (C-CDN) application that we designed on top of ONOS, proved efficient in minimizing the application’s inter-controller overhead, while satisfying the SLA-style application requirements.

本文旨在为基于物联网的环境中基于SDN技术的以内容为中心的交付网络（C-CDN）提出部署解决方案。为了在可靠性，可扩展性和性能方面满足当今的网络需求并满足特定的IoT需求，SDN架构需要在物理上分布式，但要在逻辑上集中。关键思想是考虑由SDN控制器本地提供的知识平面，以构建以信息为中心的网络（ICN）应用程序（例如，视频分发服务）。为此，针对大规模部署中的分布式SDN控制器，提出了一种自适应的，连续的一致性模型。更具体地说，我们建议遵循Quorum复制的一致性，将标准复制技术转变为可伸缩的智能复制策略。该策略使用读取和写入Quorum参数作为可调整的控制旋钮，以进行细粒度的一致性级别调整。主要目的是在运行时查找适当的部分Quorum配置，该配置在不断变化的网络和工作负载条件下实现SDN应用程序的连续性能和一致性要求之间的平衡取舍。与ONOS的静态一致性模型相比，我们在ONOS之上针对以内容为中心的交付网络（C-CDN）应用程序实施的方法在降低应用程序的控制器间开销方面得到了有效证明，同时满足了SLA-样式应用需求。主要目的是在运行时查找适当的部分Quorum配置，该配置在不断变化的网络和工作负载条件下实现SDN应用程序的连续性能和一致性要求之间的平衡取舍。与ONOS的静态一致性模型相比，我们在ONOS之上针对以内容为中心的交付网络（C-CDN）应用程序实施的方法在降低应用程序的控制器间开销方面得到了有效证明，同时满足了SLA-样式应用需求。主要目的是在运行时查找适当的部分Quorum配置，该配置在不断变化的网络和工作负载条件下实现SDN应用程序的连续性能和一致性要求之间的平衡取舍。与ONOS的静态一致性模型相比，我们在ONOS之上针对以内容为中心的交付网络（C-CDN）应用程序实施的方法在降低应用程序的控制器间开销方面得到了有效证明，同时满足了SLA-样式应用需求。