摘要： 网络存储技术的应用使存储系统和存储结构发生了显著的变化。柔性网络化数据存储中心(数据中心)采用基于IP的存储技术，使主机可以绕过服务器直接访问存储设备。该文分析了数据中心的体系结构，实验结果表明，数据中心相对于服务器存储，其性能有了大幅提高。应用于数据中心的“网络化光盘库”丰富了数据中心的存储层次，大容量磁盘缓存和光盘镜像技术提高了光盘库的性能。基于生物免疫思想的安全机制能有效地阻止对数据中心存储节点的异常访问和操作。

关键词: 数据中心, 网络存储, NAS, SAN, 光盘库

Abstract: Along with widely using information technology, modern storage system is improved to satisfy user needs. Flexible networked data storage center(data center) is an IP-based storage system in which storage devices can be accessed directly by hosts without passing through a server. This paper analyzes the system architecture of data center. The experimental results show that data center provides higher performance than server-based storage system. Network attached optical jukebox leads data center to a hierarchical storage structure. Mass disk buffer combined with CD mirror technology makes jukebox more efficient. Security of data center is also considered. A biological immunity——inspired security mechanism in data center is used to protect storage nodes from abnormal access and operation.

Key words: Data center, Network storage, NAS, SAN, Optical jukebox