Synchronous Replica Consistency Protocol with Notification and Response

Data Grids provide geographically distributed resources for large-scale data-intensive applications that generate and share large data sets. Replication has been used to reduce the access latencies and ensure fault tolerance for such large scale data sharing. In spite of the advantages offered, Replication results in consistency problems if the applications are allowed to modify the data in an uncontrolled manner. In this paper a synchronous replica consistency protocol with notification and response is proposed. It deals with keeping the replicas coherent in an effective manner. It can increase the performance and will achieve optimal bandwidth utilization for file replications. The protocol is simulated in Java. It has been compared with other consistency protocols and the experimental results shows that the proposed scheme offers better performance in terms of replication time still maintaining the consistency among replicas.