摘要
提出基于随机Petri网的网络应用系统负载Petri网(NSLPN)模型的定义,并给出该模型的一般构造方法,基于应用功能调用链将应用划分模块,根据调用链分析模块间调用关系构建出应用调用网络,并将其抽象为NSLPN模型,添加用于满足标准SPN模型以及人工干涉系统状态的辅助结构,求解系统负载稳态分布规律,具备模拟人工干涉下系统负载演变过程的能力。实例研究表明,该模型能够直观体现网络应用负载演变过程,能够为系统优化提供科学准确的数据参考。
The definition of the network-based system load Petri net(NSLPN) model based on stochastic Petri nets is proposed, and the general construction method of the model is given. The partitioning module and calling network is constructed according to the calling relationship between the calling chain analysis modules based on the system function call chain, and abstracted into an NSLPN model. An auxiliary structure for satisfying the standard SPN model and the state of the artificial interference system is added to solve the steady-state distribution law of the system load, and the ability to simulate the system load evolution process under artificial interference is provided.The case study shows that the model can intuitively reflect the evolution process of network application load and provide scientific and accurate data reference for system optimization.
引文
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