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Placement of services with flexible structures specified by a YANG data model

机译:使用Yang数据模型指定的灵活结构放置服务

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Network function visualization and software-defined networking allow services consisting of virtual network functions to be designed and implemented with great flexibility by facilitating automatic deployments, migrations, and reconfigurations for services and their components. For extended flexibility, we go beyond seeing services as a fixed chain of functions. We present a YANG model for describing the service structure in deployment requests in a flexible way that enables changing the order of functions in case the order of traversing them does not affect the functionality of the service. Upon receiving such requests, the network orchestration system can choose the optimal composition of service components that gives the best results for placement of services in the network. This introduces new complexities to the placement problem by greatly increasing the number of possible ways a service can be composed. In this paper, we describe a heuristic solution that selects a Pareto set of the possible compositions of a service as well as possible combinations of different services, with respect to different resource requirements of the services. Our evaluations show that the selected combinations consist of representative samples of possible structures and requirements and therefore, can result in optimal or close-to-optimal placement results.
机译:网络功能可视化和软件定义的网络允许通过促进服务及其组件的自动部署,迁移和重新配置,以虚拟网络函数组成的服务通过促进自动部署,迁移和组件来设计和实现。为了扩展灵活性,我们超出了作为固定功能链的服务。我们介绍了一种阳模型,用于以灵活的方式描述部署请求中的服务结构,这使得在遍历它们的顺序不影响服务的功能时启用功能的顺序。在接收到此类请求后,网络编排系统可以选择服务组件的最佳组成,该组成部分为在网络中放置服务提供最佳结果。这将通过大大增加可以组成服务的可能方式的数量来引入新的复杂性。在本文中,我们描述了一种启发式解决方案,可以在服务的不同资源需求方面选择服务的可能组成的可能组合物以及不同服务的组合。我们的评估表明,所选择的组合由可能的结构和要求的代表性样本组成,因此可能导致最佳或近距离的放置结果。

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