Cloud database is the key technology in cloud computing. The effective and efficient service quality of the cloud database is inseparable from communication technology, just as improving communication quality will reduce the concurrency phenomenon in the ticketing system. In order to visually observe the impact of communication on the cloud database, we propose a Communication-Database (C-D) Model with a single-server database over the quasi-static Rayleigh fading channel, which consists of three parts: CLIENTS SOURCE, COMMUNICATION SYSTEM and DATABASE SYSTEM. This paper uses the queuing model, M/G/1//K, to model the whole system. The C-D Model is analyzed in two cases: nonlinearity and linearity, which correspond to some instances of SISO and MIMO. The simulation results of average staying time, average number of transactions and other performance characteristics are basically consistent with the theoretical results, which verifies the validity of the C-D Model. The comparison of these experimental results also proves that poor communication quality does lead to the reduction in the quality of service.

翻译：云层数据库是云计算的关键技术。云层数据库的高效和高效服务质量与通信技术密不可分,正如提高通信质量将减少入场券系统中的通货现象一样。为了对通信对云层数据库的影响进行视觉观察,我们提议了一个通信数据库(C-D)模型,在准静态雷利脱轨频道上有一个单一服务器数据库,由三个部分组成:CLIENTS SOURCE、COMMINICONON 系统以及DATABASE系统。本文使用排队模型M/G/1/K来模拟整个系统。C-D模型在两种情况下进行了分析:非线性和线性,这与SISO和MIMO的一些实例相对应。平均停留时间的模拟结果、平均交易次数和其他性能特点与理论结果基本一致,这些理论结果证实了C-D模型的有效性。这些实验结果的比较还证明,通信质量差能导致服务质量下降。