数据中心网络可扩展性和多路路由研究

发布时间：2018-08-15 11:31

【摘要】：当前的数据中心使用传统网络结构,随着数据中心中主机数量的增多,网络成为了影响应用程序性能的主要瓶颈,传统网络中存在的资源分片,对虚拟机迁移支持不足,数据传输性能较低等问题逐渐显现出来。要从根本上解决这些问题,必须重新设计低层网络模型。针对传统网络在数据中心应用场景下表现出的不足,本文提出了一种更加适用于数据中心的新网络模型。新模型中引入一个集中式的控制器来管理和维护网络中的拓扑结构,主机位置等信息,不再使用生成树协议,使网络中可以存在冗余路径,然后在这个基础上利用考虑带宽的多路路由算法,使流量可以比较均匀的分布在多条路径上相比于传统网络结构我们的设计具备三个优势：第一新模型提供一个大的广播域网络,不存在资源碎片问题并对虚拟机迁移的支持更好；第二具有更强的可扩展性,新模型中移除了不必要的广播,解决了网络规模较大时广播风暴消耗大量带宽的问题；第三使用多路路由算法,同时使用多条路径,网络传输性能更佳。
[Abstract]:The current data center uses traditional network structure. With the increase of the number of hosts in the data center, the network becomes the main bottleneck that affects the performance of the application program. The resources in the traditional network are partitioned, and the migration of virtual machine is not supported enough. Problems such as low data transmission performance are gradually emerging. In order to solve these problems fundamentally, we must redesign the low-level network model. Aiming at the deficiency of traditional network in data center application scenario, a new network model which is more suitable for data center is proposed in this paper. In the new model, a centralized controller is introduced to manage and maintain the network topology, host location and other information, no longer using the spanning tree protocol, so that there can be redundant paths in the network. And then, on this basis, we use the bandwidth considering multipath routing algorithm, Compared with the traditional network structure, our design has three advantages: first, the new model provides a large broadcast domain network. There is no resource fragmentation problem and better support for virtual machine migration. Secondly, the new model has better scalability, removing unnecessary broadcast in the new model, which solves the problem that broadcast storm consumes a lot of bandwidth when the network scale is large. Third, using multipath routing algorithm and using multiple paths at the same time, network transmission performance is better.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP308

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