Minimizing Last-Minute Inter-Datacenter Backup with Risk-Awareness

摘要

Network failure caused by disasters results in communication disruption and huge data loss in backbone Datacenter (DC) networks. To minimize such losses, in this paper, we consider an early- warning triggered risk-aware mutual backup model, which significantly reduces the last-minute backup duration. We specifically consider the joint optimization of probabilistic backup path and site selection and the amount of data to be backed up. We propose a mixed integer linear program (ILP) for backup time minimization using dual DCs at backup sites. Further, we perform extensive numerical simulations to show that, in case of disasters, dual DC backup with Risk-aware probabilistic path selection gives significantly shorter backup windows as compared to existing algorithms.