背景:数据中心是一间配备有网络设备的控制室。网络设备包括文件服务器、集线器、路由器和调制解调器。一个数据中心可以是只安装了几个集线器的机架,也可以是装有数十台服务器、小型机和互联网设备的大房间。它以存储设备为主,包括磁盘冗余阵列、磁带库、光盘库、数据库平台以及和用于将这些设备相连的网络互连设备等。无论是由PC、 Background: A data center is a control room equipped with network equipment. Network devices include file servers, hubs, routers, and modems. A data center can be a rack with only a few hubs installed, or a large room with dozens of servers, minicomputers and Internet appliances. It is dominated by storage devices, including redundant arrays of disks, tape libraries, optical libraries, database platforms, and network interconnect devices used to connect these devices. Whether by the PC,