一种基于备份代价重要度的虚拟网络功能备份方法

为了保证网络服务的可靠性，降低备份资源成本开销，首先在初始映射视图中计算每个虚拟网络功能的备份代价重要度，每次迭代选择具有最大和次大备份代价重要度的虚拟网络功能进行联合备份，通过相应的选择和更新模型最终得到最优的备份策略。最后，将该方法与其他三种方法进行对比实验，所提算法在备份成本开销、占用的物理节点数量、服务请求接受数量和备份资源利用率上具有良好的性能。

Method for virtual network function backup based on backup-cost importance

To ensure the reliability of network services and reduce the cost of backup resources, first, by ordering the backup-cost importance of the virtual network functions, this paper made a joint backup of virtual network function with the largest and second largest backup-cost importance in each iteration, and obtained the optimal backup strategy through the corresponding selection and updated model. Finally, the method was compared with other three methods, the proposed method has better performance in the backup cost, the amount of used physical node, the number of accepted service requests and backup resource utilization.