As Internet is developing rapidly, new information is generated with an incredibly high speed. In this situation, publish/subscribe services provided by Cloud providers are used to recommend useful information to the users in the Internet. However, the middleware models and routing algorithms in existing publish/subscribe approaches cannot perform efficiently in the P2P Cloud, which is one of the novel Cloud types that belongs to the distributed Cloud. The P2P Cloud brings challenge to publish/subscribe services because it has larger scale and more complicated network architecture than the traditional Cloud. In this paper, a Potential Field based service framework is proposed to provide high-quality publish/subscribe services in P2P Cloud. A middleware is designed in the framework to match subscribe requests and published information. Furthermore, a Potential Field Model is constructed. Under the model, event brokers are organized as P2P overlay for routing on request message. The simulation results show our proposed method has advantages in recall rate, response time, and bandwidth cost against other methods.
['Jiangfeng Li', 'Zhenyu Liao', 'Zehong Zhou', 'Jian Xu', 'Qinpei Zhao', 'Chenxi Zhang']
A Potential Field Based Framework for Publish/Subscribe Service in P2P Cloud