并行PC系统结构及其I／O性能评价

传统的微／小型计算机采用共享总线结构，其带宽，扩展性，可用性，可靠性等受到限制，因此，总线形成了系统内部通信瓶颈，并行PC结构是一种新型的，以交换网络为中心的、高效的系统结构，它解决了传统PC机存在的不足和缺陷，本文对并行PC系统结构了介绍，然后采用M／M／1排队模型，针对传统PC和并行PC的I／O性能进行了评价与比较，最后给出结论及建议。

Parallel PC Architecture and Its I/O Performance Evaluation

Traditional micro and mini computer systems adopt the shared bus architecture with limited capabilities such as bandwidth, scalability, availability and reliability. Thus shared buses form the bottleneck for the system's internal communications. Parallel PC is an emerging architecture, which is around the switching network and very efficient in overcoming the shortcomings and flaws of traditional PCs. This paper first describes the architecture, then evaluates and compares traditional PCs with parallel PCs using the M/M/1 queueing model, and finally gives our conclusions and suggestions.