Walk the Line: Consistent Network Updates With Bandwidth Guarantees
New advances in technologies for high-speed and seamless migration of VMs turns VM migration into a promising and efficient means for load balancing, configuration, power saving, attaining a better resource utilization by reallocating VMs, cost management, etc. in data centers. Despite these numerous benefits, VM migration is still a challenging task for providers, since moving VMs requires update of network state, which consequently could lead to inconsistencies, outages, creation of loops and violations of Service Level Agreement (SLA) requirements. Many applications today like financial services, social networking, recommendation systems, and web search cannot tolerate such problems or degradation of service.