Distributed database systems are of more importance since Internet-based applications are developing rapidly.Modern Cloud applications and mobile applications require database with better performance and scalability.How to allocate partitioned data to database servers is important to the efficiency of the whole system.This paper proposes a heuristic data allocation method to achieve minimizing overall data operation cost.Experimental results show that the proposed data allocation method can reduce the data operation cost,thus improves the execution efficiency of the application.