A Comprehensive Survey on Data Replication Techniques in Cloud Storage Systems

摘要

Cloud storage is a service model for data storage, which is located in the network on large number of servers, where data is maintained, managed and backed-up remotely. Data replication is a technique used by large-scale cloud storage systems to ensure high availability, reliability and consistency. In this paper, a detailed study and survey of the various data replication techniques in cloud storage systems are presented. Data replication techniques falls into categories named static and dynamic replication. In a static data replication model, the number of replicas to be created and the node to place the replica is decided statically at the time of cloud storage system setup. However, in dynamic replication model, creation and placement of data is done dynamically according to changing environment and user access pattern. The review is completed with classification and comparison of the reviewed mechanisms and some related issues and some suggestions to solve it are mapped out.