An Investigation of CPU utilization relationship between host and guests in a Cloud infrastructure

Cloud computing stands as a revolution in IT world in recent years. This technology facilitates resource sharing by reducing hardware costs for business users and promises energy efficiency and better resource utilization to the service providers. CPU utilization is a key metric considered in resource management across clouds. The main goal of this thesis study is directed towards investigating CPU utilization behavior with regard to host and guest, which would help us in understanding the relationship between them. It is expected that perception of these relationships would be helpful in resource management. Working towards our goal, the methodology we adopted is experimental research. This involves experimental modeling, measurements and observations from the results. The experimental setup covers several complex scenarios including cloud and a standalone virtualization system. The results are further analyzed for a visual correlation. Results show that CPU utilization in cloud and virtualization scenario coincides. More experimental scenarios are designed based on the first observations. The obtaining results show the irregular behavior between PM and VM in variable workload. CPU utilization retrieved from both cloud and a standalone system is similar. 100% workload situations showed that CPU utilization is constant with no correlation co-efficient obtained. Lower workloads showed (more/less) correlation in most of the cases in our correlation analysis. It is expected that more number of iterations can possibly vary the output. Further analysis of these relationships for proper resource management techniques will be considered.