Coda Distributed File System is a network file system full featured. Coda is a file system in advanced networking. The project was developed at CMU since 1987 by the systems group of M. Satyanarayanan. department.Coda in the SCS is a distributed filesystem with its origin in AFS2. It has many features that are very desirable for network filesystems. Currently, Coda has several features not found elsewhere.1. disconnected operation for mobile computing2. is freely available under the Liberal banner license3. high performance through client side persistent caching4. replication5 server. security model for authentication, encryption and access control6. continuous operation during partial cuttings network server network7. adaptation8 network bandwidth. scalability9 good. well-defined semantics of sharing, even in the presence of New failuresWhat network in this version: · Coda now works on 64 bit systems. • The client and server have been built and successfully used on a machine with EM64T extensions with a 64-bit Linux kernel. • The new RVM 1.14 and RPC2-2.5 releases also incorporate defect fixes 64-bit key. • Another welcome change is that Venus is now trying to keep the rights to access memory cache available to users, even after a system reboot or restart the client, which should improve life for people who often stop or double boot their machines.