Abstract: For the dynamic resources of grid nodes result in failure of task execution in the grid environment, a reliability evaluation model for grid nodes is proposed. The model takes the usages of CPU, memory and network into account, uses fuzzy logic to deduce the probability of successful task execution of grid nodes. Experimentation is designed to use the model for task scheduling. The results demonstrate that the model not only makes a good evaluation of grid nodes reliability, but also improves task scheduling performance.

Key words: grid computing, reliability, fuzzy logic