中文摘要：

为了解决分布式系统的性能评价问题,描述了一种基于分层排队网络模型的分布式系统性能预测方法,提出一种分析分层排队网络模型的方法——集合点平均值分析（RMVA）方法来计算平均响应时间、平均吞吐量等性能参数.以DBMS为例建立了DBMS的分层排队网络模型,通过模拟实验验证了该模型及算法的合理性及有效性.

英文摘要：

Research for the problem of the performance evaluation of the distributed system, it discusses a model based on layered queuing net of distributed systems performance prediction method, and proposes an method to analyze the layered queuing net model -- Rendezvous Mean Value Analysis （RMVA） to calculate the average response time, the average throughput and other performance parameters. Taking DBMS as example, it establishes the layered queuing net model of DBMS, finally verifies the rationality and validity of the model algorithm.