公开(公告)号：EP1287441B1

公开(公告)日：2018-08-15

申请号：EP01923430.1

申请日：2001-04-10

Applicant: BlackBerry Limited

Inventor： HIND, Hugh ,  DUNK, Craig

IPC: G06F17/00

CPC classification number: G06F17/30581 ,  Y10S707/99942 ,  Y10S707/99952 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: A system and method for synchronizing data records between multiple databases is provided. Each database includes data records that are modified to include at least one pair of synchronization parameters. In a two-database system including a first database and a second database, each data record is modified to include synchronization parameters for both the first and second databases. When an update is made to a data record at one of the databases, an update message is transmitted to the other database including both synchronization parameters from the database where the update is made, along with the updated data record. An efficient master-slave configuration between the databases then enables either database to resolve conflicts without further communications. The system and method scale to systems having more than two databases by modifying the data records in at least one of the databases to include a pair of synchronization parameters for each of the other databases to which it is being synchronized, and by providing a multi-level master-slave configuration. The system and method permits the ability to add and delete records and to securely communicate between all synchronized databases.