Dynamic Data Replication Strategy in Cloud Environments

Replication of a popular file and storing its replica in the locations closer to the clients who are making requests is the best choice to reduce the execution time. Although replication helps in increasing availability, the question of how to decide an optimal replication number and correct locations to place the replicas are open challenges. In this paper, a brief survey on various data center selection and replication strategies used are described. Further, a system model with two phases, data center selection and dynamic data replication, is proposed with an aim to effectively increase the data availability and also reduce user waiting time by very small number of replicas is presented in this paper.