查看數據文件路徑，拷貝原有文件到新路徑
SQL> select * from v$logfile;
GROUP# STATUS TYPE MEMBER IS_
---------- ------- ------- ------------------------------------------------------------ ---
1 ONLINE /u01/app/oracle/oradata/citms/redo01.log NO
2 ONLINE /u01/app/oracle/oradata/citms/redo02.log NO
11 STANDBY /u01/app/oracle/oradata/citms/standby11.log NO
12 STANDBY /u01/app/oracle/oradata/citms/standby12.log NO
13 STANDBY /u01/app/oracle/oradata/citms/standby13.log NO
3 ONLINE /u01/app/oracle/oradata/citms/redo03.log NO
開啟到mount狀態；
alter database rename file '/u01/app/oracle/oradata/citms/redo01.log' to '/u01/app/oracle/rename_dir/onlinelog/redo01.log';
-----更改拼接語句
select 'alter database rename file'''||member ||''' to ''/u01/app/oracle/oradata/citms' ||
substr(member,37)||''''||';' from v$logfile;
-----------------------------------------------------------------------------------------------
一.Oracle 日志文件重建方法
1.新家新的日志組
alter database add logfile group4(‘d:\oradb\redo04.log’) size 50M；
alter database add logfile group5(‘d:\oradb\redo05.log’) size 50M；
2.切換當前日志到新的日志組(注意查看日志狀態，確保舊日志已經歸檔，不是active和current)
alter system switch logfile;
alter system switch logfile;
3.刪除舊的日志組
alter database drop logfile group 1；
alter database drop logfile group 2；
alter database drop logfile group 3；
4.到操作系統下刪除原舊的oracle日志文件組1，2，3中的文件。
5.重建日志組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.切換日志組
alter system switch logfile；
alter system switch logfile；
alter system switch logfile；
7.刪除中間過渡的日志組4，5
alter database drop logfile group 4；
alter database drop logfile group 5；
二.ORACLE DG在線日志添加日志成員
主庫：
主庫添加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;
主庫添加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;
備庫：
alter database recover managed standby database cancel;#取消APPLIED
alter system set standby_file_management='MANUAL';#設置file管理為手動
備庫添加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;
備庫添加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;
修改回自動應用和恢復備庫管理模式
alter system set standby_file_management='AUTO';
alter database recover managed standby database disconnect from session;
在主庫切歸檔
SQL> alter system switch logfile;
-----------------------
備庫注冊主庫拷貝過來的日志
ALTER DATABASE REGISTER PHYSICAL LOGFILE '/u01/app/oracle/archivelog/xxx.dbf' ;