The reliability,availability and scalability of the distributed file system are studied deeply. A set scalable distri⁃buted file system was designed and implemented. Since the size of most image resources in current Internet application is less than 100 KB,the designed file system was improved to ensure the file system performance while frequently storing,reading and writing the massive small files.%在对分布式文件系统可靠性、可用性以及可伸缩性进行深入研究后，设计并实现了一套可伸缩的分布式文件系统，针对当前互联网应用中大部分图片资源大小不超过100 KB的具体应用场景，进一步对设计的文件系统做出改进，确保文件系统在应对海量小文件存储、频繁读写时具有良好的性能。
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