环境:linux AS 3+ORA 9.2.4 +DATA GUARD MAX LOGFILES ,RESETLOGS
问题描述:目前已经搭建好了基于归档日记传输的最大性能保护模式的DG,想把它改基于REDO 日记传输模式。在备库新建STANDBY REDO 的时候报错,示例如下:
SQL> alter database add standby logfile group 4 ('/SERVER/ora9/oradata/ora9i/redo04.log') size 100M;Database altered.SQL> alter database add standby logfile group 5 ('/SERVER/ora9/oradata/ora9i/redo05.log') size 100M;Database altered.SQL> alter database add standby logfile group 6 ('/SERVER/ora9/oradata/ora9i/redo06.log') size 100M*ERROR at line 1:ORA-01185: logfile group number 6 is invalidSQL> alter database add standby logfile group 7 ('/SERVER/ora9/oradata/ora9i/redo07.log') size 100M*ERROR at line 1:ORA-01185: logfile group number 7 is invalid |
出现以上这个错误是因为控制文件中限制了MAX LOGFILES 最大日志组数量。
像这种情况只能重建控制文件。
但这是DG环境,处理控制文件要特别的小心,如果搞不好就会DG环境被破坏,需要重建环境。(那样工作量就大了)
1.导出重建脚本
SQL> alter database backup controlfile to trace;Database altered.在新产生的Trace文件中可以看到下面的内容:STARTUP NOMOUNT pfile=$Oracle_HOME/dbs/initora9i.ora-as_PRimaryCREATE CONTROLFILE REUSE DATABASE "ORA9I" RESETLOGS FORCE LOGGING ARCHIVELOG-- SET STANDBY TO MAXIMIZE PERFORMANCEMAXLOGFILES 10MAXLOGMEMBERS 3MAXDATAFILES 100MAXINSTANCES 1MAXLOGHISTORY 226LOGFILEGROUP 1 '/SERVER/ora9/oradata/ora9i/redo01.log' SIZE 100M,GROUP 2 '/SERVER/ora9/oradata/ora9i/redo02.log' SIZE 100M,GROUP 3 '/SERVER/ora9/oradata/ora9i/redo03.log' SIZE 100M-- STANDBY LOGFILEDATAFILE'/SERVER/ora9/oradata/ora9i/system01.dbf','/SERVER/ora9/oradata/ora9i/undotbs01.dbf','/SERVER/ora9/oradata/ora9i/cwmlite01.dbf','/SERVER/ora9/oradata/ora9i/drsys01.dbf','/SERVER/ora9/oradata/ora9i/example01.dbf','/SERVER/ora9/oradata/ora9i/indx01.dbf','/SERVER/ora9/oradata/ora9i/odm01.dbf','/SERVER/ora9/oradata/ora9i/tools01.dbf','/SERVER/ora9/oradata/ora9i/user01.dbf','/SERVER/ora9/oradata/ora9i/xdb01.dbf','/SERVER/ora9/oradata/ora9i/data01.dbf','/SERVER/ora9/oradata/ora9i/chxi.dbf'CHARACTER SET ZHS16GBK; |
注意:
(1)在CREATE CONTROLFILE REUSE DATABASE "ORA9I" RESETLOGS FORCE LOGGING ARCHIVELOG中间的RESETLOGS, 一定要改成NORESETLOGS,不然日志的序列就乱了。也备库的同步就会出现麻烦。
(2)更改MAXLOGFILES 10
2.在主库重建控制文件
SQL> shutdown immediate;
SQL> @recreatectl.sh
控制文件已创建.
SQL> shutdown immediate;
SQL> startup
数据库重起成功,并确认REDO LOG的SEQUENCE有没有被RESET:
SQL> select group#,sequence#,status from v$Log;GROUP# SEQUENCE# STATUS---------- ---------- ----------------1 67 ACTIVE2 66 INACTIVE3 68 CURRENT |
3.为备库重建控制文件
在主库上执行:
SQL> alter database create standby controlfile as ‘控制文件名和路径’
并传送到备份机上。
关闭备库,并用新的控制文件覆盖原来的控制文件(注意备份旧的控制文件);
4.重起备库
SQL> startup nomount;SQL> alter database mount standby database;alter database mount standby database*ERROR at line 1:ORA-01991: invalid passWord file '/SERVER/ora9/product/9.2/dbs/orapwora9i' |
提示密码文件也失效了。
解决:从主库再传一份过来,覆盖。
重启备库:
SQL> startup nomount;SQL> alter database mount standby database;SQL> alter database recover managed standby database disconnect from session; |
确认相关进程已经启动:
SQL> select process,status from v$managed_standby;PROCESS STATUS------- ------------ARCH CONNECTEDARCH CONNECTEDMRP0 WAIT_FOR_LOGRFS RECEIVINGRFS ATTACHED |
5.验证备库工作正常:
在主库作日志切换。并看备库是否接收正常。
SQL> alter system switch logfile;
查看备库是否接收到主库的日志并正确应用。
SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME, APPLIED FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;
6.继续加REDO lOG GROUP
这是因为控制文件被重建过了,之前在备库中建立成功的两个REDO4,REDO5也已经被用了。在OS中删除。
[oracle@ora9-2 ora9i]$ rm redo04.log redo05.logSQL> alter database add standby logfile group 4 ('/SERVER/ora9/oradata/ora9i/redo04.log') size 100M;Database altered.SQL> alter database add standby logfile group 5('/SERVER/ora9/oradata/ora9i/redo05.log') size 100M;Database altered.SQL> alter database add standby logfile group 6('/SERVER/ora9/oradata/ora9i/redo06.log') size 100M;Database altered.SQL> alter database add standby logfile group 7('/SERVER/ora9/oradata/ora9i/redo07.log') size 100M;Database altered. |
7.特殊情况
假如不能正常传输切换之间产生的日志,需要手动传输并注册到备库来进行恢复:
SQL> ALTER DATABASE REGISTER PHYSICAL LOGFILE '/SERVER/ora9/primary-arc/ora9i_1_60.log'; SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL; |
8.完成