文章摘要
基于SDN的数据中心网络大象流负载均衡的调度策略研究
Research on scheduling strategy of elephant flow load balancing in data center network based on SDN
投稿时间:2022-07-28  修订日期:2022-07-28
DOI:
中文关键词: 数据中心网络  大象流  负载均衡  调度策略  带宽利用率  SDN控制器单元
英文关键词: Data center network  Elephant flow  Load balancing  Scheduling strategy  Bandwidth utilization  SDN controller unit
基金项目:基金编号2021FNB01006,中国高校产学研创新基金-未来网络创新研究与应用项目:《基于SDN的数据中心网络大象流负载均衡的调度策略研究与实现》
作者单位邮编
黄宗伟 广东邮电职业技术学院 510630
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中文摘要:
      为提高网络带宽利用率、降低网络传输时延,研究基于SDN的数据中心网络大象流负载均衡的调度策略。构建基于大象流负载均衡调度总体框架,转发层sFlow信息采集代理单元采集网络各交换设备的状态信息,通过控制层的sFlow信息采集单元提交给SDN控制器单元,生成该网络的全局视图数据后,再传送给业务层的路由单元,以网络传输代价最低作为目标函数,将链路带宽资源及流量带宽需求作为约束,构建数据中心网络大象流负载均衡调度模型,采用蚁群算法求解,获得最小网络传输损耗的调度策略,由控制器单元生成流表,传送给转发层的OpenFlow交换设备。实验结果表明:链路数量越大,带宽利用率均值越高,网络传输时延越小;该调度策略可实现大象流的负载均衡调度,使链路利用比例较小。
英文摘要:
      In order to improve network bandwidth utilization and reduce network transmission delay, the scheduling strategy of elephant flow load balancing in data center network based on SDN is studied. Based on the overall framework of elephant flow load balancing scheduling, the sFlow information collection agent unit in the forwarding layer collects the state information of each switching device in the network, and submits it to the SDN controller unit through the sFlow information collection unit in the control layer. After the global view data of the network is generated, it is transmitted to the routing unit in the service layer, with the lowest network transmission cost as the objective function and the link bandwidth resources and traffic bandwidth requirements as constraints. The load balancing scheduling model of elephant flow in data center network is constructed, and the ant colony algorithm is used to solve it, so as to obtain the scheduling strategy with the minimum network transmission loss. The controller unit generates the flow table and transmits it to the OpenFlow switching equipment in the forwarding layer. The experimental results show that the larger the number of links, the higher the average bandwidth utilization rate and the smaller the network transmission delay. This scheduling strategy can realize the load balancing scheduling of elephant flow, and make the link utilization ratio smaller.
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