摘要
交换机迁移作为一种弹性控制方式对于软件定义网络(SDN)中多控制器负载均衡具有重要作用.针对现有迁移方案存在迁移效率低下和高迁移代价问题,提出基于效能优化的交换机动态迁移策略.首先,分析控制器负载组成并构建负载差异矩阵,设置触发因子进行负载不均衡判定.然后确定迁移对象,建立迁移效能模型,同时考虑负载均衡率和迁移代价来确定迁移交换机和迁入控制器.最后,通过设定迁移三元组完成迁移映射,实现高效交换机迁移.仿真结果表明,该策略可以有效降低控制器响应时间,减小迁移代价并提高控制器吞吐量,同时将负载均衡率保持在较高水平,具有良好的拓扑适应性.
As an elastic control approach,switch migration plays an important role in multi-controller load balancing in software defined networking (SDN).In order to solve the problems of low migration efficiency and high migration cost in the existing schemes,this paper proposes Switch Dynamic Migration (SDM) Strategy based on efficiency optimization.We firstly analyze the composition of controller loads in detail,set up the load difference matrix to know the distribution of loads,and introduce a trigger factor,which is used to judge load balancing on controllers through comparing the overload threshold.Then,we formulate the migration objects,and introduce the migration efficiency model,which considers load balance rate and migration cost simultaneously to select the migrating switches and immigrating controllers.Finally,we set migration triplet to complete the migration mapping and achieve the efficient switch migration.Simulation results show this mechanism could lower controller response time effectively,reduce migration cost and improve controller throughputs.Besides,it keeps high load balancing rate and has good topology adaptability.
作者
姚蓝
胡涛
伊鹏
胡宇翔
兰巨龙
李子勇
YAO Lan;HU Tao;YI Peng;HU Yu-xiang;LAN Ju-long;LI Zi-yong(National Digital Switching System Engineering & Technology Research Center,Zhengzhou,Henan 450002,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2019年第7期1482-1489,共8页
Acta Electronica Sinica
基金
国家网络空间安全专项课题(No.2017YFB0803204)
国家863高技术研究发展计划(No.2015AA016102)
国家自然科学基金创新研究群体科学基金(No.61521003)
国家自然科学基金(No.61802429,No.61872382)
关键词
软件定义网络
交换机迁移
多控制器
网络优化
software defined networking
switch migration
multi-controller
network optimization
