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曙光超级服务器是典型的机群系统，ＣＯＳＭＯＳ是为其研制开发的可扩展的单一映象文件系统． 文中主要描述了ＣＯＳＭＯＳ原型系统的设计、实现及评价．其中重点介绍了双粒度合作式缓存、分布式元数据管理及网络磁盘存储分组等关键技术，并利用Ｉ／Ｏ基准程序对原型文件系统进行了性能评价，测试结果表明了该原型系统在保证系统单一映象的基础上，具备良好的可扩展性
Dawning Super Server is a typical cluster system, COSMOS is a scalable single image file system developed for it. The paper describes the COSMOS prototype system design, implementation and evaluation. The key technologies such as dual-granularity cooperative cache, distributed metadata management and network disk storage grouping are introduced emphatically, and the performance of the prototype file system is evaluated by using I / O benchmark program. The test results show that the prototype system guarantees the system Based on a single image, with good scalability