网格环境下担保约束的信任调度

Trust Schedule for Assured Constraint in Grid Environment

信任调度模型依据信任度大小选择资源,存在因信任度不够而导致的资源闲置和任务无法执行。针对上述问题,将担保契约纳入信任模型,给出调度契约和担保契约的结构定义及协商算法,提出支撑契约和担保的体系结构,设计基于信任的担保契约资源调度算法。实验结果表明,基于信任的担保契约调度算法在信任模型基础上,放宽了对资源的选择范围,保持双方的信任水平不下降,使任务的满足率和资源利用率均得以提高。

Resource schedule based on trust model is depends on trust value of resources, which results the idle of resources and the task stagnancy at the same time, Assured contract is applied in trust model to solve the problem. This paper presents the definition and negotiating algorithms of schedule contract and assured contract respectively. As to the requirement, it proposes an infrastructure for the contract deployed. The resource schedule algorithm based on the assured trust is designed. Experimental result shows that the assured trust schedule algorithm is efficient on task fulfill ratio and resource utilization ratio in grid computing environments.