基于资源复用的Openflow流表存储优化方案

An optimization scheme for resource-reuse-based Openflow flow table storage

Openflow是现有SDN(软件定义网络)系统中最核心的技术之一。文章针对现有SDN技术中可能存在的资源紧张问题,提出了基于资源复用的Openflow流表存储优化方案,涉及SDN中Openflow流表的操作。在现有Openflow v1.3.1的基础上,定义了一种新的流表结构,提出了一种计算流表关联度的算法,并设计了更新流表的新流程。实验结果表明,该方案优化了流表表项的信息存储,能够高效利用现有硬件资源,达到在同样硬件条件下存储更多的流表表项的目的。

Openflow is one of the most key core technologies in the existing Software Defined Network （SDN）systems.In view of the possible resource shortage in the existing SDN technology,this paper proposes a resource-reuse-based Openflow flow ta-ble storage optimization scheme involving the operation of the Openflow flow table in SDN.On the basis of the existing Open-flow v1.3.1,it defines a new table structure,proposes an algorithm for computing the correlation degree of the flow table and designs a new procedure for its updating.The experimental results show that this scheme optimizes the information storage of the table entries,efficiently utilizes the available hardware resource,thereby storing more table entries under the same hard-ware conditions.