The virtual file system provides the unified api to users . this thesis analyzes the main characters of the architecture of the deltafile and the design plan and the implementation technology of file lock 、 fat long file name and buffer cache in detail 本论文详细讨论了deltafile嵌入式文件系统体系结构的主要特性,并以文件锁、 fat长文件名和块高速缓存为对象,对它们的总体设计方案和具体实现技术进行了详细的描述。