Research on the Coding Mechanism-based Data Replication in Grid Environments
Sha Ji · 2008
This paper proposes a thought of coding mechanism-based grid data replication.By carring on the linear block coding to the replica data and dispersedly saving them to the grid storage nodes,erasure capacity can be formed with the coded child-replica group.Focusing on the current hot linear block coding,this paper presents the schemes of the coding data replication based on the Cauchy Reed-Solomon code,Tornado Code and Random Linear Code,and discusses the data access and reliability performance of the replicas by the modelling method.Compared with the complete data replication and block data replication,the coding data replication has the overall better performance.Specific experimental data further illustrate that the coding expenses of the coded child-replica account for a relatively small proportion of the data replication,and indicate that the coding data replication is a feasible technical scheme.