A User Preference Driven Approach for Multi-QoS Constrained Task Scheduling in Grid

Focusing on the fact that the grid users may require various QoS and have quite different preferences on each QoS, a User Preference Driven Approach(UPDA) is proposed to schedule grid tasks with multi-QoS constraints. In UPDA, user´s needs and preferences are modeled into matrixes to serve as the basis of scheduling and Analytical Hierarchy Process(AHP) method is adopted to perform a pair wise comparison between different kinds of QoS demands to gain the preference on each QoS. Furthermore, UPDA tries to offer optimal performance on the multi-QoS targets with the consideration of the resource utilization, which is just in compliance with the ground rule of fully utilizing of spare resource in grid. Simulation results confirm that UPDA can not only better satisfy the diverse requirements of users, but also perform well in term of the resource utilization rate from the system´s perspectives.