Abstract: With the development of cloudification and informatization of government information system, the construction of government disaster recovery datacenter in China's super large cities is also evolving to the “Cloud Times”. Urban digital governance is based on digital transformation, and the core goal is “one network to run, one network to manage” . The planning and construction of a good disaster backup system for city level government information system plays an important role in ensuring public data security and government business continuity. This paper discusses the characteristics, model, architecture and key points of the network construction of super large cities disaster recovery datacenter with high degree of data concentration and many departments.

Key words: disaster recovery, government information system, disaster recovery datacenter, data level disaster recovery