The concept that the stochastic Petri net is adopted to establish the Petri net model for MapReduce logic model is presented innovatively in this paper, whose purpose is to analyse MapReduce logic model by stochastic Petri Net workflow. Based on the research of MapReduce logic model, the stochastic Petri net model was established for MapReduce logic model. The stochastic Petri net model is coincident with the property of Petri Net workflow system. The performance equivalent equations of the stochastic Petri net workflow system is employed to analyze the performance of the model, and the performance parameters of the whole system are gained. The performance parameters indicate the advantage of MapReduce in dealing with large data set.%首次提出用随机Petri网为MapReduce逻辑模型建立Petri网模型的思想,目的在于采用随机Petri网工作流性质对其进行分析.因此,在研究MapReduce逻辑模型的基础上,为其建立了随机Petri网模型.该随机Petri网模型符合随机Petri网工作流系统的性质,本文利用随机Petri网的工作流系统的性能等价公式,分析了模型的性能,最终求出整个系统的性能参数.该性能参数能够很好地说明MapReduce处理大数据集的优势.
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