In the past few years cloud computing has emerged as a popular computing model to support large amount of data. Cloud computing is featured by powerful computing capabilities. However, the resource allocation puts forward new challenges. A highly efficient database resource allocation scheme is of great significance in parallel processing of cloud computing. In this paper, we propose a novel dynamic resource allocation algorithm with cooperation strategy to handle the load within the cloud between resources. We first model and analyze the resource allocation problem. We introduce a heuristic information-based algorithm with the cooperation of all the computing nodes. We analyze the algorithm and also evaluate its performance by simulation experiments. The experiment results indicate that our algorithm conducts resource allocation fast and effectively, achieving superior performance as well