CAJ | 학술논문

软件定义网络(software defined network,简称SDN)通过集中式的控制器提高了网络的可编程性,成为近年来网络领域非常热门的话题。以Openflow网络为代表的软件定义网络将逻辑控制与数据转发相隔离,为网络虚拟化技术提供了良好的平台。集中式的抽象与控制使得SDN虚拟化框架的处理效率成为主要瓶颈。现有的SDN虚拟化框架由于缺乏对细粒度并行的支持,为编程人员充分利用多核/众核资源、控制更大规模的网络带来了极大的挑战。为了提高SDN虚拟化框架的处理效率,提出一种新的SDN虚拟化编程框架,通过新颖的API和运行时,在框架内部支持细粒度的并行处理。该框架通过对网络中流和网络资源进行抽象,使开发人员可以直接通过划分流空间来定义不同的虚拟网络,利用无锁的编程方式对共享的网络资源和流进行操作。实验结果表明,该框架在逻辑控制的执行效率方面具有良好的可扩展性,可以创建出更大规模的虚拟网络,并对其进行更为复杂的控制。
연건정의망락(software defined network,간칭SDN)통과집중식적공제기제고료망락적가편정성,성위근년래망락영역비상열문적화제。이Openflow망락위대표적연건정의망락장라집공제여수거전발상격리,위망락허의화기술제공료량호적평태。집중식적추상여공제사득SDN허의화광가적처리효솔성위주요병경。현유적SDN허의화광가유우결핍대세립도병행적지지,위편정인원충분이용다핵/음핵자원、공제경대규모적망락대래료겁대적도전。위료제고SDN허의화광가적처리효솔,제출일충신적SDN허의화편정광가,통과신영적API화운행시,재광가내부지지세립도적병행처리。해광가통과대망락중류화망락자원진행추상,사개발인원가이직접통과화분류공간래정의불동적허의망락,이용무쇄적편정방식대공향적망락자원화류진행조작。실험결과표명,해광가재라집공제적집행효솔방면구유량호적가확전성,가이창건출경대규모적허의망락,병대기진행경위복잡적공제。
Software defined network (SDN), which introduces centralized controllers to drastically increase network programmability, has been a hot topic in the network domain. Software defined network separates control plane from data plane of network equipment, establishing a good platform for network virtualization. As the network scales up, the performance of SDN virtualization framework becomes a key bottleneck. Still, current SDN virtualization frameworks lack support for fine-grained parallelism, making them challenging for developers to fully exploit many cores to virtualize large networks. This paper presents a novel API and runtime for fine-grained parallel programming in SDN virtualization framework. By abstracting flows and network resources, the framework programming model enables developers to easily write programs to directly define various virtual networks and parallelly operate the network resource or flow objects by a lock-free manner. Experimental results show that the presented framework has a better logical control performance, allowing one to implement rich functional virtual networks.