QoS-Aware Virtual Infrastructures Allocation on SDN-Based Clouds

Virtualization of computing and communication infrastructureswere disseminated as possible solutions for networksevolution and deployment of new services on clouddata centers. Although promising, their effective applicationfaces obstacles, mainly caused by rigidity on the managementof communication resources. Currently, the Software-DefinedNetworks (SDN) paradigm has been popularizing customizationand flexibility in network management due to separationof control and data planes. However, benefits introduced bySDN are not trivially applied to Virtual Infrastructures (VIs)provisioning on SDN-based cloud providers. An allocationmechanism needs joint information of control and data planesin order to deliver Quality-of-Service (QoS)-aware mappingswhile achieving provider objectives. In this work, we formulatethe online VI allocation on SDN-based cloud data centers as aMixed Integer Program (MIP). Following, integer constraintsare relaxed to obtain a linear program, and rounding techniquesare applied. The mechanism performs VI allocation consideringlatency, bandwidth, and virtual machine requirements. The results indicate that the VIs mean internal latency can bereduced while simultaneously enforcing other QoS constraints.