Abstract: Scheduling reliability not only depends on resources but also environment of correlation task and resource in grid. For the reliability problem, the author considered the influence of environment as risk, and proposed a risk model based on network congestion, virus alarm signal and system reliability and its risk infrastructure. The risk evasion scheduling algorithm of the model was put forward based on trust degree. Experiments show that the risk evasion scheduling algorithm is efficient in reducing risk and significantly improves the success rate of the scheduling.

摘要： 网格资源调度中，调度的可靠性不仅依赖资源本身，还受制于调度的环境。针对可靠性问题，将调度中环境带来的影响归纳为风险，以网络拥塞、病毒警报和系统可靠性为参数，给出了风险模型；提出了支撑该模型的体系结构；在信任度基础上，给出了规避风险的资源调度算法。实验表明，所提出的调度算法尽可能规避了存在的风险，大幅度提高了调度的成功率，实现了调度的优化。

关键词: 网格调度, 风险模型, 算法, 体系结构, grid scheduling, risk model, algorithm, architecture