Expandable and Cost-Effective Network Structures for Data Centers Using Dual-Port Servers
Expandable and Cost-Effective Network Structures for Data Centers Using Dual-Port Servers
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DOI：
10.1109/tc.2012.90
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发表时间：
2013-07
影响因子：
3.7
通讯作者：
Deke Guo;Tao Chen;Dan Li;Mo Li;Yunhao Liu;Guihai Chen
中科院分区：
文献类型：
--
作者：
Deke Guo;Tao Chen;Dan Li;Mo Li;Yunhao Liu;Guihai Chen
数据中心联网的一个基本目标是以较低的设备成本高效地互连大量服务器。已经提出了几种用于数据中心的以服务器为中心的网络结构。然而，它们并不是真正可扩展的，而且规律性和对称性程度较低。受当今数据中心配备双端口的商用服务器的启发，我们考虑如何构建可扩展且经济高效的结构，而不需要昂贵的高端交换机和除两个网卡端口之外的服务器上的额外硬件。本文设计了两种这样的网络结构：HCN和BCN，这两种网络结构都是服务器度为2的。我们还为HCN和BCN设计了低开销和健壮的路由机制。虽然服务器阶数只有2，但HCN可以很容易地扩展到包含数十万台小直径和高等分宽度的服务器。此外，HCN具有高度的规律性、可扩展性和对称性，符合数据中心的模块化设计。BCN是目前已知的最大的数据中心网络结构，服务器度为2，网络直径为7。此外，BCN还具有许多吸引人的特点，包括直径小、对分宽度大、可用于一对一业务的大量节点不相交路径以及良好的容错能力。数学分析和综合仿真表明，HCN和BCN具有良好的拓扑结构，是一种可行的数据中心网络结构。
A fundamental goal of data center networking is to efficiently interconnect a large number of servers with the low equipment cost. Several server-centric network structures for data centers have been proposed. They, however, are not truly expandable and suffer a low degree of regularity and symmetry. Inspired by the commodity servers in today's data centers that come with dual port, we consider how to build expandable and cost-effective structures without expensive high-end switches and additional hardware on servers except the two NIC ports. In this paper, two such network structures, called HCN and BCN, are designed, both of which are of server degree 2. We also develop the low overhead and robust routing mechanisms for HCN and BCN. Although the server degree is only 2, HCN can be expanded very easily to encompass hundreds of thousands servers with the low diameter and high bisection width. Additionally, HCN offers a high degree of regularity, scalability, and symmetry, which conform to the modular designs of data centers. BCN is the largest known network structure for data centers with the server degree 2 and network diameter 7. Furthermore, BCN has many attractive features, including the low diameter, high bisection width, large number of node-disjoint paths for the one-to-one traffic, and good fault-tolerant ability. Mathematical analysis and comprehensive simulations show that HCN and BCN possess excellent topological properties and are viable network structures for data centers.