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Data Replica Placement Policy Based on Load Balance in Cloud Storage System

Data replication technology has been widely used in cloud storage system. How to select the appropriate data center to place data replication to effectively improve the access performance of cloud storage system became a problem which is worthy of study. To solve this problem we presented a replica placement algorithm based on load balance in this paper. According to the capital value of the data center, the algorithm selects a new replica node and can ensure load balance between the data centers. Related simulation experiments show that the algorithm can quickly and effectively respond to user requests and it is reliable and efficient.