A Transmission Mechanism of the Backup for Disaster Recovery in DCNs

Data center networks (DCNs), which serve as the core infrastructure for storing and processing large amounts of data, require a reliable and efficient transmission mechanism of the backup for disaster recovery. When a potential disaster is detected, this transmission mechanism should ensure that the data in nodes of DCNs which may be destroyed, can be backed up as many as possible to other security nodes within a tight deadline. This paper first analyzes and summarizes the existing transmission mechanisms of DCNs at home and abroad, as well as the characteristics and requirements of the backup for disaster recovery in DCNs. And then on this basis, the paper proposes a new transmission mechanism — DCNs backup TCP (DBTCP), which is dedicated to the backup for disaster recovery in DCNs. In addition to making as many flows as possible to meet the deadline, DBTCP also achieves low latency, high throughput, and high burst tolerance. Besides, DBTCP can coexist with current transmission mechanisms used widely, such as TCP, DCTCP and D2TCP, so that it allows incremental deployment. Through simulation and evaluation, it is confirmed that DBTCP can be adapt to the backup for disaster recovery scene of DCNs, and has outstanding performance. At present, both the backup for disaster recovery and the transmission mechanism in DCNs are domestic and overseas research hotspots. The DBTCP proposed in this paper provides a reliable and effective solution, and has a certain reference value for future research.