1、先查找备库控制文件路径
先在备库上找出控制文件的路径，通过和主库一样，不过为了以防万一，还是check为好。
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SQL> select name from v$controlfile; NAME -------------------------------------------------------------------------------- /Oracle/app/oracle/oradata/powerdes/control01.ctl /oracle/app/oracle/fast_recovery/powerdes/control02.ctl SQL> |
2、准备控制文件备份文件
在主库上备份当前的控制文件，记得生成的备份文件要在执行全备之前生成，而且命令行也是带for standby字样的backup current controlfile for standby format'/home/oracle/ctlfile.bak'才行，也可以手动提前生成。
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RMAN> backup current controlfile for standby format '/home/oracle/ctlfile.bak'; Starting backup at 2016-11-23 21:20:41 using channel ORA_DISK_1 channel ORA_DISK_1: starting full datafile backup set channel ORA_DISK_1: specifying datafile(s) in backup set including standby control file in backup set channel ORA_DISK_1: starting piece 1 at 2016-11-23 21:20:42 channel ORA_DISK_1: finished piece 1 at 2016-11-23 21:20:43 piece handle=/home/oracle/ctlfile.bak tag=TAG20161123T212041 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01 Finished backup at 2016-11-23 21:20:43 RMAN> |
然后等备份任务结束后，在主库上，将备份前生成的控制文件、最近的一份备份文件到备库的相同目录：
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scp /oracle/app/oracle/oradata/powerdes/control01.ctl 192.168.3.112:/home/oracle/ scp -r /data/backup/data/2016-11-23 192.168.3.112:/home/oracle/ |
3、检查主库备库环境
获取备库的tns：（我的是earth_m2）
cat $ORACLE_HOME/network/admin/tnsnames.ora
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earth_m2 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.3.112)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = powerdes) ) ) |
（1）查看主库备库SID名字是否统一，这个很重要
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# 备库： [oracle@t1_dbm1_3_112 data]$ echo $ORACLE_SID powerdes [oracle@t1_dbm1_3_112 data]$ # 主库： [oracle@t1_dbm1_3_111 ~]$ echo $ORACLE_SID powerdes [oracle@t1_dbm1_3_111 ~]$ |
（2）查看主库备份传输密码是否一致：
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# 备库： [oracle@t1_dbm1_3_112 dbs]$ cd $ORACLE_HOME/dbs [oracle@t1_dbm1_3_112 dbs]$ strings orapwpowerdes ]\[Z ORACLE Remote Password file INTERNAL 89F7167638478F13 0Cv# B6E56CBCA47429E2 [oracle@t1_dbm1_3_112 dbs]$ # 主库： [oracle@t1_dbm1_3_111 ~]$ cd $ORACLE_HOME/dbs [oracle@t1_dbm1_3_111 dbs]$ strings orapwpowerdes ]\[Z ORACLE Remote Password file INTERNAL 89F7167638478F13 0Cv# B6E56CBCA47429E2 [oracle@t1_dbm1_3_111 dbs]$ |
4、启动备库到nomount状态
在备库上，直接copy覆盖控制文件
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cp /home/oracle/ctlfile.bak /oracle/app/oracle/oradata/powerdes/control01.ctl cp /home/oracle/ctlfile.bak /oracle/app/oracle/fast_recovery/powerdes/control02.ctl |
然后启动到nomount状态
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SQL> startup nomount ORACLE instance started. Total System Global Area 8551575552 bytes Fixed Size 2270360 bytes Variable Size 7247760232 bytes Database Buffers 1291845632 bytes Redo Buffers 9699328 bytes SQL> |
5、使用duplicate恢复备库
在主库上，使用rman登录远程备库earth_m2
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[oracle@t1_dbm1_3_111 ~]$ rlwrap rman target / auxiliary sys/04181123@earth_m2 Recovery Manager: Release 11.2.0.4.0 - Production on Wed Nov 23 20:05:54 2016 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. connected to target database: POWERDES (DBID=3481287162) connected to auxiliary database: POWERDES (not mounted) RMAN> |
在rman命令行里面执行恢复命令：
run {
allocate auxiliary channel c1 devicetype disk;
allocate auxiliary channel c2 devicetype disk;
duplicate target database for standbynofilenamecheck dorecover;
release channel c1;
release channel c2;
}
#nofilenamecheck：必须指定NOFILENAMECHECK参数，避免覆盖primary数据库的当前的数据文件。另外主从路径一致，不需要执行文件路径以及check了
#release ：这是关闭 前两行开启的通道
执行过程比较漫长，屏幕滚动信息比较多，这里不贴出来了，省略过……
执行命令后，需要很长时间，需要等待，因为需要写入文件到备库的数据文件目录里面，找个时候，在备库的alert log后台有如下记录日志，表明正在写数据文件：
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Full restore complete of datafile 4 /oracle/app/oracle/oradata/powerdes/users01.dbf. Elapsed time: 0:00:00 checkpoint is 32945676 last deallocation scn is 3 Wed Nov 23 20:14:42 2016 Full restore complete of datafile 3 /oracle/app/oracle/oradata/powerdes/undotbs01.dbf. Elapsed time: 0:00:05 checkpoint is 32945676 last deallocation scn is 32897307 Undo Optimization current scn is 32934775 Wed Nov 23 20:15:50 2016 Full restore complete of datafile 5 /oracle/app/oracle/oradata/powerdes/example01.dbf. Elapsed time: 0:01:18 checkpoint is 32945676 last deallocation scn is 32806636 ………… |
6、ORA-01152:问题
最后rman命令行里面duplicate命令执行完，窗口界面上有如下报错信息:
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Signalling error 1152 for datafile 1! Errors in file /oracle/app/oracle/diag/rdbms/earth_m2/powerdes/trace/powerdes_pr00_4069.trc: ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below ORA-01152: file 1 was not restored from a sufficiently old backup ORA-01110: data file 1: '/oracle/app/oracle/oradata/powerdes/system01.dbf' ORA-1547 signalled during: alter database recover cancel... ^C |
有报错没有关系，接下来直接开始应用日志，启动归档日志传输，通过应用归档日志来保证主备数据的一致性：
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# 先开始启动传输开始应用日志 SQL> alter database recover managed standby database using current logfile disconnect from session; Database altered. SQL># 实时观察应用日志状态 SQL> select sequence#,applied from v$archived_log order by sequence# asc; …… SEQUENCE# APPLIED ---------- --------- 2334 YES 2335 YES 2301 rows selected. SQL> # 等观察应用日志结束后，退出日志传输 SQL> alter database recover managed standby database cancel; Database altered. SQL> # 将备库从mount启动到open状态 SQL> alter database open; Database altered. SQL> # 查看备库状态，就会变成READ ONLY SQL> select database_role,open_mode from v$database; DATABASE_ROLE OPEN_MODE ---------------- -------------------- PHYSICAL STANDBY READ ONLY SQL> # 然后再次启动日志应用 SQL> alter database recover managed standby database using current logfile disconnect from session; Database altered. SQL> # 查看open_mode，有了READ ONLY WITH APPLY字样，OK SQL> select database_role,open_mode from v$database; DATABASE_ROLE OPEN_MODE ---------------- -------------------- PHYSICAL STANDBY READ ONLY WITH APPLY SQL> |
至此，Data Guard备库修复完成，如果遇到了ORA-01152问题，不需要慌张，可以试试应用日志来恢复数据。