Optimal Replica Placement Strategy for Hierarchical Data Grid Systems

Grid computing is an important mechanism for utilizing distributed computing resources. These resources are distributed in different geographical locations, but are organized to provide an integrated service. In order to speed up data access efficiency data grid systems replicate essential data in multiple locations, so that a user can access the data from a site in his vicinity. This paper studies replica placement in Data Grid systems, taking into account several important issues described below. First, the replicas should be placed in proper server locations so that the workload on each server is balanced. Second, we choose the optimal number of replicas to balance the data access efficiency, and the expensive maintenance costs for multiple copies of data. Clearly, optimizing access cost of data requests and reducing the cost of replication are two conflicting goals. Finding a good balance between them is a challenging task. We propose efficient algorithms for selecting optimal...

• Type: Conference
• Year: 2006
• Where: CCGRID
• Authors: Pangfeng Liu, Jan-Jan Wu
• Keywords: CCGRID 2006, Cluster Computing, Data Access Efficiency, Data Grid Systems, Replicas