A New Optimistic Replication Strategy For Large-Scale Mobile Distributed Database Systems

This paper proposes a new optimistic replication strategy for maintaining the eventual consistency inlarge-scale mobile distributed database systems. The proposed strategy consists of three components inorder to support the characteristics of such systems. These components are: replication architecture,updates propagation protocol, and replication method. The purpose of the replication architecture is toprovide a comprehensive infrastructure for distributing replicas among wide areas. The purpose of thepropagation protocol is to transfer data updates between the components of the replication architecturein a manner that achieves the eventual consistency of data and improves the availability of recentupdates to all replicas. The replication method provides a mechanism for implementing the propagationprotocol, and automating the propagation of updates among the different replicas. The effectiveness ofthe proposed strategy is compared with two baseline replication strategies and shown that it achievesupdates propagation delay reduction. Also, the results showed that the horizontal extension provided bythe proposed strategy is more suitable than the vertical extension for large scale mobile distributeddatabase systems.