When you create a broker, you specify the user name and password that are used to connect to the broker database. The process of creating a broker creates the necessary broker tables in the user's schema within the broker database if the tables do not already exist. DB2 authenticates the user name using operating system user management; you do not have to define the user name to DB2 itself.
To create a DB2 database on Linux or UNIX:
When you issue the command that creates the broker, tables are created within the database to hold the information required.