ORACLE RAC 修改实例名（实际操作记录分享）

1. 备份全库和spfile
   backup as compressed backupset database plus archivelog;
   expdp dbank/dbank directory=dmp_dir dumpfile=dbank_2015623.dmp logfile=dbank.log parallel=5 SCHEMAS=DBANK
   Create pfile from spfile;
2. 收集数据库信息
   $DB_HOME/bin/srvctl config database -d <db_unique_name> -a
   $DB_HOME/bin/srvctl config service -d <db_unique_name>
3. 创建一个新的pfile
   Create pfile from spfile;
4. 关闭所有节点
   crsctl stop cluster -all
5. 重命名或编辑实例名称和其他参数使用实例名称。

For example: instance_name, service_names

6. 创建新的实例之一Sid名字节点新密码文件。复制密码文件到其他节点和重命名它与相应的新的SID的名字。
   If Data guard is in use, copy the password file from the primary $ORACLE_HOMEs to the standby server and rename it with the corresponding standby SID name.
7. Startup the database with new pfile file and create a spfile using new pfile.
8. Remove the old instance name and add a new instance name using srvctl command. ( Follow below for all instances whose names are changed )

$ srvctl remove instance -d <db_unique_name> -i <instance_name>
$ srvctl add instance -d <db_unique_name> -i <instance_name> -n <node>
Configure the services back (if necessary)

$ srvctl modify service -d <db_unique_name> -s <service_name>
Start the database

$ srvctl start database -d <db_unique_name>

SQL> select instance_name,status from gv$instance

9. Check tnsnames.ora, if INSTANCE_NAME is used, rename it accordingly.

For example:

net_service_name=
(DESCRIPTION=
(ADDRESS=...)
(ADDRESS=...)
(CONNECT_DATA=

(SERVICE_NAME=sales.us.example.com)
(INSTANCE_NAME=sales1)))