关键词: 广域网智能存储系统，存储管理规范，元数据管理，存储中间件

Abstract: Aimed at the rapid data growth and the difficulties of network resource management and use in next generation Internet, the WAN intelligent storage system( WISS) adopts multi-level and scalable distributed storage mode to improve the performance of the network storage system based on system architecture optimization. Its storage management follows SMI-S specification. And it proposed an effective load balancing strategy and high-speed secure storage middleware solution for metadata management and data transmission in complex network environment WISS both improves data transfer rate,and reduces management cost It achieves the goal of separating control and data flow and accclerating data transfer while expanding storage capacity at the same time. As a result, WISS enhances the performance of the whole storage system enormously.

Key words: WISS, SMI-S, Metadata management, Storage middleware