A. Teperman and A.Weit [8] introduced cooperative cache storage to distributed file system to improve performance. It shows cooperative cache algorithm and distributed transaction increase performance. In cooperative cache all the cache memory of peers integrate and use as coherent cache. In that approach he separate file management and storage management. According to that research it increase efficiency of system. Data stored in OSD (Object Storage Devices) and files store in distributed storage. So peers are divided into two types. Data store peers and Data processes peers.