Performance evaluation of node in cloud storage

There is a method to evaluate the performance of the node storage the replica in the cloud storage, under this method we can get better node when we place the replica according to user requirement for service. First, establish the model of the performance of the node storage the replica using the analytic hierarchy process. Then, obtain the weighting of each factor in model using the combination weight. At last, the valuations of nodes are calculated and the rank of nodes is given by grey comprehensive evaluation. Experiment results show that the proposed method could provide more reasonable replica strategies effectively.