查看数据文件路径，拷贝原有文件到新路径
SQL> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- ------- ------------------------------------------------------------ ---
1 ONLINE /u01/app/oracle/oradata/citms/redo01.log NO
2 ONLINE /u01/app/oracle/oradata/citms/redo02.log NO
11 STANDBY /u01/app/oracle/oradata/citms/standby11.log NO
12 STANDBY /u01/app/oracle/oradata/citms/standby12.log NO
13 STANDBY /u01/app/oracle/oradata/citms/standby13.log NO
3 ONLINE /u01/app/oracle/oradata/citms/redo03.log NO
开启到mount状态；
alter database rename file '/u01/app/oracle/oradata/citms/redo01.log' to '/u01/app/oracle/rename_dir/onlinelog/redo01.log';
-----更改拼接语句
select 'alter database rename file'''||member ||''' to ''/u01/app/oracle/oradata/citms' ||
substr(member,37)||''''||';' from v$logfile;
-----------------------------------------------------------------------------------------------
一.Oracle 日志文件重建方法
1.新家新的日志组
alter database add logfile group4(‘d:\oradb\redo04.log’) size 50M；
alter database add logfile group5(‘d:\oradb\redo05.log’) size 50M；
2.切换当前日志到新的日志组(注意查看日志状态，确保旧日志已经归档，不是active和current)
alter system switch logfile;
alter system switch logfile;
3.删除旧的日志组
alter database drop logfile group 1；
alter database drop logfile group 2；
alter database drop logfile group 3；
4.到操作系统下删除原旧的oracle日志文件组1，2，3中的文件。
5.重建日志组1，2，3
alter database add logfile group 1 ('d:\oradb\redo01_1.log') size 20M;
alter database add logfile group 2 ('d:\oradb\redo02_1.log') size 20M;
alter database add logfile group 3 ('d:\oradb\redo03_1.log') size 20M;
6.切换日志组
alter system switch logfile；
alter system switch logfile；
alter system switch logfile；
7.删除中间过渡的日志组4，5
alter database drop logfile group 4；
alter database drop logfile group 5；
二.ORACLE DG在线日志添加日志成员
主库：
主库添加ONLINE redo log member
alter database add logfile member '/u01/app/oracle/oradata/citms/redo01_1.log' to group 1;
alter database add logfile member '/u01/app/oracle/oradata/citms/redo02_1.log' to group 2;
alter database add logfile member '/u01/app/oracle/oradata/citms/redo03_1.log' to group 3;
主库添加standby log member
alter database add standby logfile member '/u01/app/oracle/oradata/citms/redo04_1.log' to group 4;
alter database add standby logfile member '/u01/app/oracle/oradata/citms/redo05_1.log' to group 5;
alter database add standby logfile member '/u01/app/oracle/oradata/citms/redo06_1.log' to group 6;
备库：
alter database recover managed standby database cancel;#取消APPLIED
alter system set standby_file_management='MANUAL';#设置file管理为手动
备库添加ONLINE redo log member
alter database add logfile member '/data/app/oracle/oradata/TIANJIN/redo01_2.log' to group 1;
alter database add logfile member '/data/app/oracle/oradata/TIANJIN/redo02_2.log' to group 2;
alter database add logfile member '/data/app/oracle/oradata/TIANJIN/redo03_2.log' to group 3;
备库添加standby log member
alter database add standby logfile member '/data/app/oracle/oradata/TIANJIN/standbyredo01_2.log' to group 4;
alter database add standby logfile member '/data/app/oracle/oradata/TIANJIN/standbyredo02_2.log' to group 5;
alter database add standby logfile member '/data/app/oracle/oradata/TIANJIN/standbyredo03_2.log' to group 6;
修改回自动应用和恢复备库管理模式
alter system set standby_file_management='AUTO';
alter database recover managed standby database disconnect from session;
在主库切归档
SQL> alter system switch logfile;
-----------------------
备库注册主库拷贝过来的日志
ALTER DATABASE REGISTER PHYSICAL LOGFILE '/u01/app/oracle/archivelog/xxx.dbf' ;