中文摘要：

把用户的文件分片后均衡存储在不同的分布式存储节点上，并利用虚拟目录服务器和基于P2P—DHT的目录服务器把文件元数据与文件数据片高效地对应起来，以提供高效目录服务，分布式存储节点以P2P方式工作以快速完成用户对文件数据的请求任务。分布式网络存储系统DNSS充分利用了CDN和P2P的技术优势，有较高的可用性、可靠性和可扩展性。DNSS已经在中国科学技术大学应用。

英文摘要：

The user＇ s file is balanced stored at different distributed storage nodes after being split. File metadata and file data slice are matched high-efficiently by virtual directory server and P2P-DHT-based directory server in order to provide high-efficient directory service. Distributed storage nodes complete quickly by means of P2P system the tasks of file data requested by users. Distributed network storage system （DNSS） takes full advantage of the technology superiority of CDN and P2P and is of high availability, reliability and sealability. DNSS has been used in University of Science and Technology of China.