The main system resources of cluster are processors, internal memory and disks. This paper introduces the key techniques relating to SSI for realizing global resource management: distributed memory management, global disk management and global proces-sor management. 机群的主要系统资源是处理器、内存和磁盘,为实现全局资源管理的单一系统映像,文中介绍了与之有关的关键技术:分布式存储器管理、全局磁盘管理和全局处理器管理。