Trust-QoS enhanced grid service scheduling

At present existing scheduling algorithms in service grid largely ignore the impact of trust mechanism. It is rather doubtful to adopt these algorithms in a realistic environment. Based on the grid trust model and trust utilization functions, a computational service scheduling problem based on trust QoS enhancement is proposed. A novel trust-QoS enhanced heuristic based on trust relationship is put forward. The algorithms are evaluated with large scale simulation. Simulation results demonstrate trust-driven heuristics perform better than time-driven heuristic. The algorithm based on trust relationship achieves better integrative performance on performance-QoS, trust-QoS, etc. than trust-driven Min-Min and Sufferage heuristic algorithms.