Validation Rules based on Concurrency Control (VRCC) For Network File System

File systems are central parts of any modern operation system, and are expected to be both fast and exceedingly reliable. Network file System (NFS) is one of the components in the distributed file system. This paper implements the system to manage file concurrency control using the Optimistic Concurrency Control method and Validation rules in NFS. In this system, Validation by using the read-write conflict rules to ensure that the scheduling of a particular transaction is serially equivalent with respect to all other overlapping transaction. It includes collection of processes, possibly running on different operating system and machines, sharing common file system and up-to-date file to make read and write. To assist in performing validation, each transaction is assigned a transaction when it enters the validation phase. If the transaction is validated and completes checked and is aborted, or if the transaction is read only, the number is released for reassignment