Disaster backup and recovery technology can efficiently ensure the information system to work normally when the disaster occurs,so it becomes a very important field in information security.

This paper introduces briefly the concepts of the disaster backup and recovery,expounds in detail the disaster backup and recovery techniques and the representative products,and looks forward to the development of the disaster backup techniques.

This paper introduces the disasters that probably occur in library s information system,analyzes on the importance of the disaster backup and recovery of library s information system,and puts forward some corresponding solving methods.

The Disaster Recovery System of Large-scale ERP System Research and Construction;

The database disaster recovery system is an effective approach to improve the security of data.