NetCP: Consistent, Non-Interruptive and Efficient Checkpointing and Rollback of SDN

摘要: Network failures are inevitable due to its increasing complexity, which significantly hampers system availability and performance. While adopting checkpointing rollback recovery protocols (C/R for abbreviation) from distributed systems into computer networks is promising, several specific challenges appear as we design a C/R Software-Defined Networks (SDN). The should be coordinated with other applications in the SDN controller, each individual switch not interrupt traffic traversing it, controller faces challenge of time space overhead. We propose framework SDN, named NetCP. NetCP coordinates get consistent global checkpoints, it leverages redundant forwarding tables switches so avoid interrupting traffic, analyzes dependencies between make minimal decision. have implemented prototype using current standard tools demonstrate that achieves consistency, non-interruption, efficiency negligible