修改DBID, DBNAME步骤 不是instance_name哦!
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修改DBID, DBNAME步骤
在这里,只演示一下修改DBID 和 DBNAME的操作。 并不修改INSTANE_NAME.
步骤如下:
1. Backup of the database.
2. Shutdown IMMEDIATE of the database
3. STARTUP MOUNT
4. Open one session and run NID with sysdba privileges
% nid TARGET=SYS/password@test_db DBNAME=test_db2
- the value of DBNAME is the new dbname of the database
5. After DBNEWID successfully changes the DBID,Shutdown IMMEDIATE of the database
6. Set the DB_NAME initialization parameter in the initialization parameter file to the new database name.
7. Create a new password file.
8. Startup of the database with open resetlogs
在修改之前,先看一下数据库的参数:
SQL> select name,dbid,db_unique_name from v$database;
NAME DBID DB_UNIQUE_NAME
--------- ---------- ------------------------------
ORCL 1264931370 orcl
SQL> select instance_name from v$instance;
INSTANCE_NAME
----------------
orcl
2.1 shutdown database
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
2.2 Startup mount
SQL> startup mount;
ORACLE instance started.
Total System Global Area 360710144 bytes
Fixed Size 1219424 bytes
Variable Size 109053088 bytes
Database Buffers 247463936 bytes
Redo Buffers 2973696 bytes
Database mounted.
2.3 Run NID command
[oracle@singledb bdump]$ nid
DBNEWID: Release 10.2.0.1.0 - Production on Mon Dec 20 14:26:13 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Keyword Description (Default)
----------------------------------------------------
TARGET Username/Password (NONE)
DBNAME New database name (NONE)
LOGFILE Output Log (NONE)
REVERT Revert failed change NO
SETNAME Set a new database name only NO
APPEND Append to output log NO
HELP Displays these messages NO
[oracle@singledb bdump]$ nid target=/ dbname=dave
DBNEWID: Release 10.2.0.1.0 - Production on Mon Dec 20 14:27:13 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to database ORCL (DBID=1264931370)
Connected to server version 10.2.0
Control Files in database:
/u01/app/oracle/oradata/orcl/control01.ctl
/u01/app/oracle/oradata/orcl/control02.ctl
/u01/app/oracle/oradata/orcl/control03.ctl
Change database ID and database name ORCL to DAVE? (Y/[N]) => Y --手工输入
Proceeding with operation
Changing database ID from 1264931370 to 801102850
Changing database name from ORCL to DAVE
Control File /u01/app/oracle/oradata/orcl/control01.ctl - modified
Control File /u01/app/oracle/oradata/orcl/control02.ctl - modified
Control File /u01/app/oracle/oradata/orcl/control03.ctl - modified
Datafile /u01/app/oracle/oradata/orcl/system.256.736598559 - dbid changed, wrote new name
Datafile /u01/app/oracle/oradata/orcl/undotbs1.258.736598599 - dbid changed, wrote new name
Datafile /u01/app/oracle/oradata/orcl/sysaux.257.736598563 - dbid changed, wrote new name
Datafile /u01/app/oracle/oradata/orcl/users.259.736598641 - dbid changed, wrote new name
Datafile /u01/app/oracle/oradata/orcl/temp.263.736599505 - dbid changed, wrote new name
Datafile /u01/app/oracle/oradata/orcl/temp01.dbf - dbid changed, wrote new name
Control File /u01/app/oracle/oradata/orcl/control01.ctl - dbid changed, wrote new name
Control File /u01/app/oracle/oradata/orcl/control02.ctl - dbid changed, wrote new name
Control File /u01/app/oracle/oradata/orcl/control03.ctl - dbid changed, wrote new name
Instance shut down
Database name changed to DAVE.
Modify parameter file and generate a new password file before restarting.
Database ID for database DAVE changed to 801102850.
All previous backups and archived redo logs for this database are unusable.
Database is not aware of previous backups and archived logs in Recovery Area.
Database has been shutdown, open database with RESETLOGS option.
Succesfully changed database name and ID.
DBNEWID - Completed succesfully.
[oracle@singledb bdump]$
2.4 修改PFILE 里的DB_NAME参数
[oracle@singledb dbs]$ cat initorcl.ora
...
*.db_name='dave'
...
2.5 用pfile启动数据库,并用resetlogs 打开
SQL> startup mount pfile='/u01/app/oracle/product/10.2.0/db_1/dbs/initorcl.ora';
ORACLE instance started.
Total System Global Area 360710144 bytes
Fixed Size 1219424 bytes
Variable Size 109053088 bytes
Database Buffers 247463936 bytes
Redo Buffers 2973696 bytes
Database mounted.
SQL> alter database open resetlogs;
Database altered.
2.7 查看修改之后的信息
SQL> select name,dbid,db_unique_name from v$database;
NAME DBID DB_UNIQUE_NAME
--------- ---------- ------------------------------
DAVE 801102850 dave
SQL> select instance_name from v$instance;
INSTANCE_NAME
----------------
orcl
SQL>
在这里看到, db_name 和DBID 都修改了,但是instance_name 没有修改。 在官网的文档里提到了重建密码文件,因为我的instance_name没有修改,所以我没有进行重建。
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