Modeling and Evaluating of Resource Allocation in Openstack Cloud Computing Platform

Infrastructure as a service (IaaS) is a form of cloud computing, which converts physical machines (PMs) to various types of resources by virtualization technology, and delivers these resources to customers by a on-demand way. However, different customer requirements complicate the usage of resources. In this paper, we employ a high level formalization way, Performance Evaluation Process Algbra (PEPA), to model the Openstack IaaS cloud computing platform based on the angle of resources allocation and use fluid flow to analyze the model. The performance parameters achieved from the analysis reveal the optimal equilibrium point between customer satisfaction and idelness ratio of plant.