What is disaster recovery backup?

Disaster tolerance and backup are two concepts, and disaster tolerance backup in general is the abbreviation of "disaster tolerance backup".

Disaster recovery actually refers to the whole process of information system responding to disasters, which should include both pre-disaster backup and post-disaster recovery. Disaster tolerance focuses on the ability of system switching to deal with disasters; Backup is mainly used for data recovery after disaster.

Before the emergence of integrated disaster recovery and backup products, disaster recovery system and backup system were independent of each other.