Enhancing the performance of post-failure restoration schemes in multi-tenant networks

Failure in the physical network can cause a temporal or permanent unavailability of some resources, which can lead to a quality of service (QoS) degradation and loss of revenue. While much work has been dedicated to the survival of delay-constrained applications, little attention has been paid to enhancing the performance of the post-failure recovery scheme by maintaining the performance for the affected applications. In this paper, we introduce a QoS provisioning framework that overcomes the limitations of post-failure recovery techniques. The framework aims at not only fixing the failed applications, but also providing sufficient QoS guarantees for the hosted applications in case of link/node failure while maximizing the resources utilization. Simulation results of a data center hosting multicast applications prove that the proposed method boosts the recovery scheme to achieves better restoration ratio in a considerably fast execution time, and increases the revenue.