Cloud Rack: Enhanced virtual topology migration approach with Open vSwitch

Cloud computing has emerged to provide infrastructure for cost-effectively hosting applications with dynamically changing demands for computational resources. Dynamic resource allocation in cloud computing is made possible through virtualization technologies. In addition, live migration of services hosted in virtual machines (VMs) among multiple data centers is expected to add more flexibility in elastic resource allocation. Our recent work, Mobitopolo, has shown the proof of concept of an infrastructure to enable live migration of VMs with logical connections intact among them. However, since Mobitopolo makes more of portability, it suffers from network performance. In this paper, we propose alternative design and implementation of logical topology migration using KVM and Open vSwitch (OVS) to realize an infrastructure for applications demanding for much network performance.