A Model of Data Replication Strategy Based on Security in Grid
一种基于安全的网格数据副本策略模型

Data replication in data grid is an important technique, by which, better access performance can be got. It is also a fault-tolerant approach, but at the same time brings some hidden trouble for security. Therefore, security and fault- tolerance should be coUigated to research. Combining data replication with security, we proposed a mathematic model which can determine data replication quantity. In this model, taking economic interest and reputation index of service supplier into account, an optimization problem of two targets was simplified under reasonable hypothesis. Numeric calculation and analysis show that there is an optimal quantity for the data replication.