中文摘要：

目前数据中心的结构多采用server-centric或树状结构设计。Server-centric结构由于交换节点之间缺乏直接相连的链路，影响了服务器之间通信的路径多样性。树状结构采用层次结构，不利于同层各交换节点之间的数据交换。该文介绍了一种用于构建数据中心的新型结构，即双列循环移数结构（two lineb barrel shifter，TLBS）。理论分析和仿真实验结果显示：该结构可克服树状结构中同层节点数据交换不便的缺点，同时具备丰富的数据路径多样性。该结构网络直径低，扩展性较强，是一种理想的数据中心构建结构。

英文摘要：

Many of today＇s data centers use server-centric or tree like structures. Sever centric systems have few direct links between switch nodes, which influences the path diversity for the communication between servers. Tree like systems use tier structures, which limits data switching between switch nodes in the same tier. This paper introduces a data center architecture, named the two line barrel shifter （TLBS）. Tests indicate that this architecture has good path diversity and provides convenient data switching between nodes in the same tier in a tree-like structure. In addition, this architecture has low diameters and strong scalability, so it is an ideal data center architecture.