Question: I want to rename my
instance and I want to know hot to use the dbnewid
procedure.
Answer:
Here is a sample session of using the
dbnewid (nid) command utility:
The dbname of the Oracle instance can
be changed using the nid utility. After the rename,
the database will need to be bounced (shutdown and mounted
again):
nid target=sys/change_on_install
dbname=lappsdb setname=yes
The following output will appear. The
command will prompt for input on the following question:
"Change database name of database <old dbname> to <new
dbname>? (Y/[N]) => "
Type Y and press enter.
----------------Output of nid command---------------
DBNEWID: Release 9.2.0.4.0 - Production
Copyright (c)
1995, 2002, Oracle Corporation. All rights reserved.
****************************************
For Oracle9i and beyond, Oracle author
Dr. Tim Hall has
this procedure to rename an Oracle database using the
new dbnewid (also called nid, for new ID)
utility:
- STEP 1: Backup the database.
- STEP 2: Mount the database after a
clean shutdown:
SHUTDOWN IMMEDIATE
STARTUP MOUNT
- STEP 3: Invoke the DBNEWID utility (nid)
specifying the new DBNAME from the command line
using a user with SYSDBA privilege:
nid TARGET=sys/password@TSH1 DBNAME=TSH2
Assuming the validation is successful the
utility prompts for confirmation before
performing the actions. Typical output may look
something like:
C:\oracle\920\bin>nid TARGET=sys/password@TSH1 DBNAME=TSH2
DBNEWID: Release 9.2.0.3.0 - Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
Connected to database TSH1 (DBID=1024166118)
Control Files in database:
C:\ORACLE\ORADATA\TSH1\CONTROL01.CTL
C:\ORACLE\ORADATA\TSH1\CONTROL02.CTL
C:\ORACLE\ORADATA\TSH1\CONTROL03.CTL
Change database ID and database name TSH1 to TSH2? (Y/[N]) => Y
Proceeding with operation
Changing database ID from 1024166118 to 1317278975
Changing database name from TSH1 to TSH2
Control File C:\ORACLE\ORADATA\TSH1\CONTROL01.CTL - modified
Control File C:\ORACLE\ORADATA\TSH1\CONTROL02.CTL - modified
Control File C:\ORACLE\ORADATA\TSH1\CONTROL03.CTL - modified
Datafile C:\ORACLE\ORADATA\TSH1\SYSTEM01.DBF - dbid changed, wrote new name
Datafile C:\ORACLE\ORADATA\TSH1\UNDOTBS01.DBF - dbid changed, wrote new name
Datafile C:\ORACLE\ORADATA\TSH1\CWMLITE01.DBF - dbid changed, wrote new name
Control File C:\ORACLE\ORADATA\TSH1\CONTROL01.CTL - dbid changed, wrote new name
Control File C:\ORACLE\ORADATA\TSH1\CONTROL02.CTL - dbid changed, wrote new name
Control File C:\ORACLE\ORADATA\TSH1\CONTROL03.CTL - dbid changed, wrote new name
Database name changed to TSH2.
Modify parameter file and generate a new password file before restarting.
Database ID for database TSH2 changed to 1317278975.
All previous backups and archived redo logs for this database are unusable.
Shut down database and open with RESETLOGS option.
Succesfully changed database name and ID.
DBNEWID - Completed succesfully.
- STEP 4: Shutdown the database:
SHUTDOWN IMMEDIATE
- STEP 5: Modify the DB_NAME parameter
in the initialization parameter file. The
startup will result in an error but proceed
anyway.
STARTUP MOUNT
ALTER SYSTEM SET DB_NAME=TSH2 SCOPE=SPFILE;
SHUTDOWN IMMEDIATE
- STEP 6: Create a new password file:
orapwd file=c:\oracle\920\database\pwdTSH2.ora password=password entries=10
- STEP 7: Rename the SPFILE to match
the new DBNAME.
- STEP 8: If you are using Windows you
must recreate the service so the correct name
and parameter file are used:
oradim -delete -sid TSH1
oradim -new -sid TSH2 -intpwd password -startmode a -pfile c:\oracle\920\database\spfileTSH2.ora
If you are using UNIX/Linux simply reset the
ORACLE_SID environment variable:
ORACLE_SID=TSH2; export ORACLE_SID
- STEP 9: Alter the listener.ora and
tnsnames.ora setting to match the new database
name and restart the listener:
lsnrctl reload
- STEP 10: Open the database with
RESETLOGS:
STARTUP MOUNT
ALTER DATABASE OPEN RESETLOGS;
- STEP 11: Backup the database.
