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There's an easier way to do this :
You tnsnames.ora needs changing
Next the service 'ernie' needs to be created manually on the primary database and started.
ernie = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = pdbuserv04.uservices.umn.edu)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = bdbuserv01.uservices.umn.edu)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = ernie) ) )
Several of the default parameters can now be set for 'ernie'.
BEGIN DBMS_SERVICE.CREATE_SERVICE('ernie','ernie'); END; / DBMS_SERVICE.START_SERVICE('ernie');
Finally a database STARTUP trigger should be created to ensures that this service is only offered if the database is primary.
BEGIN DBMS_SERVICE.MODIFY_SERVICE ('ernie', FAILOVER_METHOD => 'BASIC', FAILOVER_TYPE => 'SELECT', FAILOVER_RETRIES => 200, FAILOVER_DELAY => 1); END; /
Search B19306_01 for 'ernie' and more details.
CREATE TRIGGER CHECK_ERNIE_START AFTER STARTUP ON DATABASE DECLARE V_ROLE VARCHAR(30); BEGIN SELECT DATABASE_ROLE INTO V_ROLE FROM V$DATABASE; IF V_ROLE = 'PRIMARY' THEN DBMS_SERVICE.START_SERVICE('ernie'); ELSE DBMS_SERVICE.STOP_SERVICE('ernie'); END IF; END; /
Kind of. They could be "Primary" and "Standby". "ernie" is what the customer sees. An extra entry.
This seems both the production and DR need to have exact same service name.
So a "lsnrctl status" would show both.
Service "ernie" has 1 instance(s).
Instance "PRIMARY", status READY, has 1 handler(s) for this service...
You can use DBMS_SERVICE.CREATE_SERVICE to create several aliases for the same database.