Database Schema Management Method for Creation of Duplicate Relations in Exchanges

摘要

The present invention relates to a database schema management method for a redundant relation in a database management system (DBMS) of an electronic exchanger.;When a request for generation of a redundant relation occurs, a schema manager of each processor related to a data change asks whether it is possible to allocate a memory according to a data change, and when a response message is received, the schema manager of each processor is obtained through a query The schema manager of each processor performs the schema creation according to the transmitted information and adds information to the duplicate table of the OMP database. If all the operations are successful, the backup is performed on the disk according to the contents of the log during the schema change. If one processor fails to change the schema, the rest of the processors refer to the log contents,