Tuesday, September 1, 2009

Moving to a to new domain. Oracle Database.

Moving your Oracle database instance to a to new domain? I recently moved several Oracle database servers to a new physical location. We changed domains and IP addresses in the move.

This is what I needed to do to update the production databases to the new domain.

Update the host information in both listener.ora and tnsnames.ora.

Edit

$TNSADMIN/listener.ora
$TNSADMIN/tnsnames.ora

Update Global Names:
Changing the Domain in a Global Database Name

Use the ALTER DATABASE statement to change the domain in a database global name. Note that after the database is created, changing the initialization parameter DB_DOMAIN has no effect on the global database name or on the resolution of database link names.

The following example shows the syntax for the renaming statement, where database is a database name and domain is the network domain:

SQL> ALTER DATABASE RENAME GLOBAL_NAME TO SID.DOMAIN.COM;


SQL> SELECT * FROM GLOBAL_NAME;

GLOBAL_NAME

----------------------------------------------------------------------------

SID.DOMAIN.COM


Updating DB_DOMAIN

SQL> show parameters db_domain

db_domain string OLD_DOMAIN.COM

SQL> alter system set db_domain='NEW_DOMAIN.COM' scope=spfile;

SQL>

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup
ORACLE instance started.


Verify the DB_DOMAIN was updated.

SQL> show parameters db_domain
db_domain string new_domain.com

SERVICE_NAME - Service name only needs to be updated if you have set a fixed name in the init.ora file. If you have not set it then it will automatically take on the SID + db_domain. This should match your Global Names parameter.

SQL> show parameters SERVICE_NAME
service_names string SID.domain.com

Renaming SERVICE_NAME
SQL> create pfile from spfile;

SQL> shutdown immediate;
Database closed.

Database dismounted.
ORACLE instance shut down.

Edit init.ora and remove service name from file.

SQL> startup pfile='/app/oracle/product/10.2/dbs/initSID.ora'

SQL> show parameters SERVICE_NAME
SQL> create spfile from pfile='/app/oracle/product/10.2/dbs/initSID.ora';
SQL> shutdown immediate;

SQL> startup
ORACLE instance started.

SQL> create pfile from spfile;
SQL> show parameters SERVICE_NAME;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
service_names string SID.DOMAIN.COM
SQL>

Database Links -

Drop and create all database links used to connect to any database with an updated domain.

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