Cost-efficient live VM migration based on varying electricity cost in optical cloud networks

Information and Communication Technology (ICT) proliferation has led to widespread use of cloud-computing services. ICT constitutes a significant portion of the worldwide energy consumption, and reduction in operating energy expenditures is a high priority for cloud-service providers. Spatial and temporal variations in electricity price can be exploited to reduce the operating cost. One approach is to employ live VM migration for moving, at the right time of the day, virtualized workloads (i.e., VMs) towards those datacenters (DCs) with cheaper energy price. Our approach for cost-efficient VM migration based on varying electricity prices significantly reduces the energy cost to operate cloud services.