PaaS混搭云构建与节点优化配比分析

摘要

针对传统企业信息系统如何向云服务模式过渡、降低服务运行成本的问题，分析用于搭设云服务的开源PaaS平台“Cloud Foundry”的技术架构及其动态扩展性特征，提出一种基于此平台重用已有服务器的混搭云构建方法。通过对用户访问量的典型特征分析，针对用户访问具有周期性的特点，提出一种结合预测的混搭云负载均衡节点调度算法。考虑云服务采用虚拟化技术的性能损耗，从总计算成本最小化的角度出发，给出物理服务器与虚拟服务器的最优配比算法。%For the migration from traditional enterprise information system to the mode of cloud service and the effort to reduce service running cost,the technology architecture and dynamic expansion features of Cloud Foundry (CF)as well as an open source platform of PaaS were analyzed,and a construction method of mix cloud was proposed to reuse legacy servers based on CF.Besides that,an node scheduling algorithm of mix cloud load balancing was put forward based on forecasting through the analysis of typical characteristics of user traffic.Considering the performance loss of virtualization technology used in cloud ser-vices,an algorithm to acquire the optimized proportion of physical servers and virtual server was given from the perspective of minimizing total computing cost.