1. School of Information Technology, Deakin University, Geelong, VIC, Australia
2. Jiangsu Province Engineering Research Center of Advanced Computing and Intelligent Services, School of Software, Nanjing University of Information Science and Technology, Nanjing, China
3. National Engineering Research Center for Big Data Technology and System, Services Computing Technology and System Lab, Cluster and Grid Computing Lab, School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan, China