SaaS应用中基于SLA的资源分配研究

随着云计算的普及,软件即服务(Software as a Service,SaaS)得到了广泛的关注.SaaS应用中,需要满足客户服务等级协议(Service Level Agreement,SLA)要求、减少SLA服务违例的同时,尽量提高系统资源的利用率,这对资源分配策略提出了挑战.提出了SaaS模式下的基于SLA的资源分配策略:基于对客户请求动态变化的分析,针对"首次租用服务"和"租用服务升级"两种请求类型,提出了一种用户请求与底层资源的映射策略;提出了提高虚拟机重用度的基于SLA的资源效率优化分配算法.实验表明,该资源分配算法可以在有效保证服务质量的同时,提高资源的利用率.

SLA-based Resource Allocation in Software as a Service Applications

With the popularity of cloud computing,software as a service has been widespread concerned.In SaaS applications we need to meet customer service level agreements requirements,reduce the number of SLA violations,and maximize the utilization of system resources,this poses a challenge for resource allocation strategies.In this paper,under the SaaS model we proposed a SLA-based resource allocation strategies:based on the analysis of the dynamic changes of customer requests,for ’frist time rent’ and ’upgrade service’ two request types we proposed a user requests to infrastructure resource mapping strategy;proposed a SLA-based resource efficiency optimize allocation algorithm to improve the reusability of the virtual machine.The experiments show that the resource allocation algorithm can effectively guarantee the quality of service,and improve resource utilization at the same time.