Abstract: Owing to the reason that the dynamic of cloud computing may affect the Quality of Service (QoS) of business workflow,the business workflow execution should be monitored,a novel checkpoint selection strategy for time-constrained instance-intensive business workflow was proposed.According to the magnitude of business workflow activities and fitting function,the strategy could output the checkpoint position.Through the throughput based analysis of business workflow checkpoint,the strategy could predict the execution time of business workflow.Experimental results demonstrated that the proposed strategy could complete business workflow in cloud computing platform to guarantee satisfactory user's requirements.

Key words: business workflow, checkpoint, quality of service, throughput

摘要： 鉴于云计算的动态性导致商务工作流的服务质量得不到保障,需要在商务工作流的执行过程中对其进行监测分析,提出一种针对实例密集型商务工作流检测点的选择策略。该策略通过对商务工作流活动规模进行分析,用一次拟合函数确定检测点的位置。通过分析商务工作流检测点时刻的吞吐量,该策略完成了对整个商务工作流运行时间的预测。通过实验验证,该策略下的商务工作流在云环境下的服务质量能够达到用户要求。

关键词: 商务工作流, 监测点, 服务质量, 吞吐量