| 摘要 |
A database system comprising a first database (10) including a database manager (11) and a schema (12) with set of rules enabling the database manager to store and access data items (14a, 14b) in the first database, and a second database (20) storing a plurality of data items (24a, 24b). The schema (12) further including rules (25') to enable the database manager (11) to access at least a subset of the data items (24a, 24b) in the second database (20). The first database further includes a first link (26) pointing from the primary item (14a) to a replica (14b) of the secondary item (24b) stored in the first database (10), and a second link (27) pointing from the replica (14b) to the secondary item (24a) in the second database (20). According to the invention, it is possible to use replication in order to achieve integration, compared with conventional replication, which is made only for the purpose of allowing access, or to achieve decreased access latency. |
