DR: A Two-Stage Dynamic Replication Strategy for Data Grid

One major challenge in data grids is how to provide good and timely access to huge amount of data in distributed locations, given the high latency of interconnection networks. Dynamic replication strategies are regarded as one of the major optimization technique for reducing access latency. In addition to reducing data access time, replication also aims to use network and storage resource efficiently. Some strategies for data replication have previously been proposed, but they assumed unlimited storage for replicas. In this paper, we propose a two-stage dynamic replication strategy to provide an integrated environment for efficient access to data. Simulation results demonstrate that 2 DR maintains a balance between improvement in data access time and storage resource usage.