In order to improve the survivability of the database, a remote backup method(MMDRB) was presented. The local database was monitored in real time, and the data changes of it were encapsulated into records, which were put into a mass buffer. Then, records in the mass buffer were sent to several remote one-level databases asynchronously, and the data changes were replayed on the remote one-level databases. And also, the data changes of the remote one-level databases were monitored and replicated to several remote two-level databases. The multi-point and multi-hop remote backup of the local database was achieved. The proposed method had the features of multi-point and multi-hop backup, good real-time capability, fine backup granularity and low network requirement. The theoretical analysis and the experiment results showed that this method was a new good approach of database remote backup.
