关键词: 数据布局, 聚类, 一致hash, 数据关联性

Abstract: The prominent feature of the modern information systems is the distributed applications clustering based on massive data, so optimizing the storage of mass data to improve the response time of the application service while making full use of the storage resources is an important task. Because of the dependency of the data, the data placement algorithm which simply considers the load balancing is lack of practicability, so it needs to further consider the denpendency of the data to improve the response time of the application service. So it establishes a denpendency matrix, clusters the data based on the dependency matrix, and then distributes the data to each data center. It analyses data movements of the application and compared with the consistent hashing, the results show that the data movements is greatly decreased.

Key words: data placement, clustering, consistent hash, data dependence