Application of VCG in Replica Placement Strategy of Cloud Storage

With the rapid development of the cloud computing and big data, many data center network are growing more large scale, and the number of servers is increasing at an exponential rate. In this paper, VCG (Vickrey-Clarke-Groves) mechanism was introduced into replica placement. Mapping from replica placement model to VCG mechanism was established and suitable payment function was designed. Data storage strategy is built on the distributed file system. In order to ensure the reliability of data storage GFS and HDFS are further both referred to the concept of replica of data block. This paper generally introduced replica strategy, and mentioned that the storage location of data replica is a key point of the research on replica technology currently. This paper mainly applied one cloud platform simulation tool---the CloudSim to simulate the algorithm. The performance of the algorithm was analyzed in the CloudSim platform and compared it with other related algorithms. The simulation experiments were done on the replica placement strategy of the data block, which shows that replica placement strategy can also achieve the established goal.