This paper proposes a new Calking Dynamic Replication Distribution Algorithm(CDRDA) considering the communication cost among storage resource brokers and the characteristic of data accessing.

• 本文针对一种简化的数据网格环境；考虑存储资源代理对数据的访问频率和代理间的网络性能；提出一种填空式数据副本分配算法(CDRDA).