修改数据库名(db_name)及实例名(Instance_name or Service_name)
操作系统版本:rhel6.5 (Red Hat Enterprise Linux Server release 6.5 (Santiago)）
数据库版本：12.1.0.2.0
实验目的：
假设原来的数据库名为scp,要改成etdb,原实例名(service_name,instance_name)scp,要改成etdb.
当前数据库的db_name和instance_name:
SQL> select dbid,name from v$database; DBID NAME ---------- --------- 3247610670 SCP SQL> show parameter name; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ cell_offloadgroup_name string db_file_name_convert string db_name string scp db_unique_name string scp global_names boolean FALSE instance_name string scp lock_name_space string log_file_name_convert string pdb_file_name_convert string processor_group_name string service_names string scp
使用oracle自带的nid工具修改数据库的db_name:
SQL> shutdown immediate; --先停止数据库 Database closed. Database dismounted. ORACLE instance shut down.
SQL> startup mount; --nid需要在mount状态下才能做 ORACLE instance started. Total System Global Area 2147483648 bytes Fixed Size 2926472 bytes Variable Size 1325402232 bytes Database Buffers 805306368 bytes Redo Buffers 13848576 bytes Database mounted. SQL> ! nid target=sys/hzsunssytem dbname=etdb --nid是操作系统下执行的命令 DBNEWID: Release 12.1.0.2.0 - Production on Wed May 25 19:25:52 2016 Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved. Connected to database SCP (DBID=3247610670) Connected to server version 12.1.0 Control Files in database: /home/OracleData/scp/control01.ctl /home/OracleArch/fast_recovery_area/scp/control02.ctl Change database ID and database name SCP to ETDB? (Y/[N]) => Y --需要确认 Proceeding with operation Changing database ID from 3247610670 to 637227457 Changing database name from SCP to ETDB Control File /home/OracleData/scp/control01.ctl - modified Control File /home/OracleArch/fast_recovery_area/scp/control02.ctl - modified Datafile /home/OracleData/scp/system01.db - dbid changed, wrote new name Datafile /home/OracleData/scp/sysaux01.db - dbid changed, wrote new name Datafile /home/OracleData/scp/undotbs01.db - dbid changed, wrote new name Datafile /home/OracleData/scp/users01.db - dbid changed, wrote new name Datafile /home/OracleData/scp/temp01.db - dbid changed, wrote new name Control File /home/OracleData/scp/control01.ctl - dbid changed, wrote new name Control File /home/OracleArch/fast_recovery_area/scp/control02.ctl - dbid changed, wrote new name Instance shut down --此时数据库实例已经关闭 Database name changed to ETDB. Modify parameter file and generate a new password file before restarting. Database ID for database ETDB changed to 637227457. 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. SQL> conn / as sysdba; Connected to an idle instance. --连接到空闲实例 SQL> SQL> SQL> startup mount; --启动数据库到mount状态 ORACLE instance started. Total System Global Area 2147483648 bytes Fixed Size 2926472 bytes Variable Size 1325402232 bytes Database Buffers 805306368 bytes Redo Buffers 13848576 bytes ORA-01103: database name 'ETDB' in control file is not 'SCP' --提示控制文件中的数据库名与实际的数据库名不匹配 SQL> alter system set db_name=etdb scope=spfile; System altered. SQL> shutdown immediate; ORA-01507: database not mounted ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 2147483648 bytes Fixed Size 2926472 bytes Variable Size 1325402232 bytes Database Buffers 805306368 bytes Redo Buffers 13848576 bytes Database mounted. SQL> select dbid,name from v$database; DBID NAME ---------- --------- 637227457 ETDB SQL> alter database open resetlogs; Database altered.
修改数据库的 instance_name:
SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> exit Disconnected from Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options [oracle@dg1 ~]$ sed -i s/"ORACLE_SID=scp"/"ORACLE_SID=etdb"/g ~/.bash_profile [oracle@dg1 ~]$ source ~/.bash_profile [oracle@dg1 ~]$ env | grep ORACLE_SID ORACLE_SID=etdb [oracle@dg1 ~]$ mv $ORACLE_HOME/dbs/spfilescp.ora $ORACLE_HOME/dbs/spfileetdb.ora [oracle@dg1 ~]$ sqlplus "/ as sysdba" SQL*Plus: Release 12.1.0.2.0 Production on Wed May 25 23:49:44 2016 Copyright (c) 1982, 2014, Oracle. All rights reserved. Connected to an idle instance. SQL> startup ORACLE instance started. Total System Global Area 2147483648 bytes Fixed Size 2926472 bytes Variable Size 1325402232 bytes Database Buffers 805306368 bytes Redo Buffers 13848576 bytes Database mounted. Database opened. SQL> show parameter name; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ cell_offloadgroup_name string db_file_name_convert string db_name string ETDB db_unique_name string ETDB global_names boolean FALSE instance_name string etdb lock_name_space string log_file_name_convert string pdb_file_name_convert string processor_group_name string service_names string ETDB
SQL> alter system register; --向listener注册
System altered.
SQL> host lsnrctl reload;
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 25-MAY-2016 23:52:04
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dg1)(PORT=1521)))
The command completed successfully
SQL> host lsnrctl status;
LSNRCTL for Linux: Version 12.1.0.2.0 - Production on 25-MAY-2016 23:52:10
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=dg1)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production
Start Date 25-MAY-2016 23:14:06
Uptime 0 days 0 hr. 38 min. 4 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/12.1.0.2/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/dg1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dg1.zytk.com)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Services Summary...
Service "ETDB" has 1 instance(s).
Instance "etdb", status READY, has 1 handler(s) for this service...
Service "scpXDB" has 1 instance(s).
Instance "etdb", status READY, has 1 handler(s) for this service...
The command completed successfully
最后修改一下密码文件：
如果listener.ora、 tnsnames.ora文件中含有原来的 SERVICE_NAME 名称的话，用编辑器做相应的修改。
针对数据库自启动文件： /etc/oratab , /etc/rc.local 文件也需要做相应的修改。
