oracle dataguard Renaming a Datafile in the Primary Database

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oracle dataguard Renaming a Datafile in the Primary Database

Renaming a Datafile in the Primary Database
When you rename one or more datafiles in the primary database, the change is not
propagated to the standby database. Therefore, if you want to rename the same
datafiles on the standby database, you must manually make the equivalent
modifications on the standby database because the modifications are not performed
automatically, even if the STANDBY_FILE_MANAGEMENT initialization parameter is set
to AUTO.
The following steps describe how to rename a datafile in the primary database and
manually propagate the changes to the standby database.
1. To rename the datafile in the primary database, take the tablespace offline:
SQL> ALTER TABLESPACE tbs_4 OFFLINE;
2. Exit from the SQL prompt and issue an operating system command, such as the
following UNIX mv command, to rename the datafile on the primary system:
% mv /disk1/oracle/oradata/payroll/tbs_4.dbf
/disk1/oracle/oradata/payroll/tbs_x.dbf
3. Rename the datafile in the primary database and bring the tablespace back online:
SQL> ALTER TABLESPACE tbs_4 RENAME DATAFILE
2> '/disk1/oracle/oradata/payroll/tbs_4.dbf'
3> TO '/disk1/oracle/oradata/payroll/tbs_x.dbf';
SQL> ALTER TABLESPACE tbs_4 ONLINE;
4. Connect to the standby database, query the V$ARCHIVED_LOG view to verify all
of the archived redo log files are applied, and then stop Redo Apply:
SQL> SELECT SEQUENCE#,APPLIED FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;
SEQUENCE# APP
Primary Database Changes That Require Manual Intervention at a Physical Standby
Managing Physical and Snapshot Standby Databases 9-9
--------- ---
8 YES
9 YES
10 YES
11 YES
4 rows selected.
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
5. Shut down the standby database:
SQL> SHUTDOWN;
6. Rename the datafile at the standby site using an operating system command, such
as the UNIX mv command:
% mv /disk1/oracle/oradata/payroll/tbs_4.dbf /disk1/oracle/oradata/payroll/tbs_
x.dbf
7. Start and mount the standby database:
SQL> STARTUP MOUNT;
8. Rename the datafile in the standby control file. Note that the STANDBY_FILE_
MANAGEMENT initialization parameter must be set to MANUAL.
SQL>alter system set STANDBY_FILE_MANAGEMENT =manual;
SQL> ALTER DATABASE RENAME FILE '/disk1/oracle/oradata/payroll/tbs_4.dbf'
2> TO '/disk1/oracle/oradata/payroll/tbs_x.dbf';
9. On the standby database, restart Redo Apply:
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE
2> DISCONNECT;

If you do not rename the corresponding datafile at the standby system, and then try to
refresh the standby database control file, the standby database will attempt to use the
renamed datafile, but it will not find it. Consequently, you will see error messages
similar to the following in the alert log:
ORA-00283: recovery session canceled due to errors
ORA-01157: cannot identify/lock datafile 4 - see DBWR trace file
ORA-01110: datafile 4: '/Disk1/oracle/oradata/payroll/tbs_x.dbf'

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