有时我们需要修改数据库的sid和dbname,除了使用rman进行备份恢复之外,也可以通过手工方式修改,主要由两个主要过程完成:
1、修改实例名(SID)
2、修改数据库名(dbname)
1、修改实例名(SID)
2、修改数据库名(dbname)
下面演示将数据库sid和dbname由orcl修改为cnhtm的过程:
1、修改实例名(sid)
1.1、检查原来的数据库实例名(sid)
oracle@oracle[/home/oracle]> echo $ORACLE_SID orcl oracle@oracle[/home/oracle]> sqlplus / as sysdba SQL*Plus: Release 10.2.0.1.0 - Production on Sun Dec 20 11:14:49 2009 Copyright (c) 1982, 2005, Oracle. All rights reserved. Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options sys@ORCL> select instance from v$thread; INSTANCE -------------------------------------------------------------------------------- orcl |
1.2、关闭数据库
注意不能用shutdown abort,只能是shutdown immediate或shutdown normal
sys@ORCL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. sys@ORCL> exit Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options |
1.3、修改oracle用户的ORACLE_SID环境变量,如由orcl修改为cnhtm
oracle@oracle[/home/oracle]> cat ~/.bash_profile|grep -i sid ORACLE_SID=cnhtm export ORACLE_BASE ORACLE_HOME ORACLE_SID PATH |
1.4、修改/etc/oratab文件,将sid名由旧的修改为新的,如从orcl修改为cnhtm
oracle@oracle[/home/oracle]> cat /etc/oratab ...... cnhtm:/oracle/app/10.1:Y +ASM:/oracle/app/10.1:Y |
1.5、进入到$ORACLE_HOME/dbs目录
将所有文件名中包含原来的sid的修改为对应的新sid的
如我对如下文件修改为其后对应的文件
数据库实例名是什么意思如我对如下文件修改为其后对应的文件
hc_orcl.dat->hc_cnhtm.dat lkORCL->lkCNHTM orapworcl->orapwcnhtm snapcf_orcl.f->snapcf_cnhtm.f a-&a |
1.6、使新修改的ORACLE_SID环境变量生效
oracle@oracle[/oracle/app/10.1/dbs]> . ~/.bash_profile oracle@oracle[/oracle/app/10.1/dbs]> echo $ORACLE_SID cnhtm |
1.7、重建口令文件
因为口令文件改名后不能在新实例中使用,所以重建
oracle@oracle[/oracle/app/10.1/dbs]> orapwd file=$ORACLE_HOME/dbs/orapw$ORACLE_SID password=oracle entries=5 force=y oracle@oracle[/oracle/app/10.1/dbs]> ls -lrt orapw* -rw-r----- 1 oracle oinstall 2048 Dec 20 11:27 orapwcnhtm |
1.8、启动数据库
oracle@oracle[/oracle/app/10.1/dbs]> sqlplus / as sysdba SQL*Plus: Release 10.2.0.1.0 - Production on Sun Dec 20 11:29:53 2009 Copyright (c) 1982, 2005, Oracle. All rights reserved. Connected to an idle instance. idle> startup ORACLE instance started. Total System Global Area 167772160 bytes Fixed Size 1218292 bytes Variable Size 62916876 bytes Database Buffers 96468992 bytes Redo Buffers 7168000 bytes Database mounted. Database opened. |
1.9、检查数据库实例名
通过如下语句检查数据库实例名,发现实例名已经由orcl变成cnhtm
idle> select instance from v$thread; INSTANCE -------------------------------------------------------------------------------- cnhtm |
2、修改数据库名(dbname)
虽然已经修改过了实例名(sid),但是数据库的名称(dbname还是原来的名称orcl)
idle> conn / as sysdba Connected. sys@ORCL> show parameter name NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_file_name_convert string db_name string orcl db_unique_name string orcl global_names boolean FALSE instance_name string cnhtm lock_name_space string log_file_name_convert string service_names string orcl |
可以通过如下步骤修改数据库名(dbname)
2.1、首先切换一下在线日志,使数据库做checkpoint
sys@ORCL> alter system archive log current; System altered. |
2.2、生成重建控制文件的脚本
sys@ORCL> alter database backup controlfile to trace resetlogs; Database altered. |
2.3、关闭数据库,需要干净关闭,不能shutdown abort
sys@ORCL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. sys@ORCL> exit Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options |
2.4、进入$ORACLE_BASE/admin/<sid>/udump目录中,到最新生成的trc文件,这就是重建控制文件的脚本
oracle@oracle[/oracle/admin/orcl/udump]> ls -lrt total 2608 -rw-r----- 1 oracle oinstall 577 Nov 7 13:37 orcl_ ...... -rw-r----- 1 oracle oinstall 4407 Dec 20 11:36 cnhtm_ |
2.5、将到的trc文件复制一份,并命名为ccf.sql
oracle@oracle[/oracle/admin/orcl/udump]> cp cnhtm_ ccf.sql |
2.6、修改ccf.sql
版权声明:本站内容均来自互联网,仅供演示用,请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198,我们将在24小时内删除。
发表评论