The data replication not only reduces network lag and bandwidth consumption when accessing long-range data, but also improves load balance of network, security and reliability of data.

数据复制不仅可以降低远程访问数据的网络延迟及带宽消耗，还可以提高网络的负载平衡，并且提高数据的安全性、可靠性。

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Then, the author discusses them from four aspects: the configuration of server, information organization and resource storage, load balance, and network security.

接着从服务器配置技术、资源组织与存储技术、负载均衡技术和网络安全技术几个方面予以论述。

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