oracle 11g ADG GAP修复---方法2

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一、模拟产生GAP 1.备库停止DG同步进程： SQL> archive log list Database log mode              Archive Mode Automatic archival             Enabled Archive destination            /oracle/archive Oldest online log sequence     72 Next log sequence to archive   0 Current log sequence           74   SQL> alter database recover managed standby database cancel;   Database altered.   SQL> SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down.   2.主库切换多次归档： SQL> archive log list Database log mode              Archive Mode Automatic archival             Enabled Archive destination            /oracle/archive Oldest online log sequence     72 Next log sequence to archive   74 Current log sequence           74 SQL> SQL> SQL> SQL> alter system switch logfile;   System altered.   SQL> /   System altered.   SQL> /   System altered.   SQL> /   System altered.   SQL> archive log list Database log mode              Archive Mode Automatic archival             Enabled Archive destination            /oracle/archive Oldest online log sequence     76 Next log sequence to archive   78 Current log sequence           78   3.主库删除/移动最近几个归档日志： [oracle@dgdb1 ~]$ cd /oracle/archive/ [oracle@dgdb1 archive]$ mv 1_74_1024761634.dbf 1_75_1024761634.dbf 1_76_1024761634.dbf 1_77_1024761634.dbf /home/oracle   4.备库开启同步进程： SQL> alter database recover managed standby database using current logfile disconnect from session;   Database altered.     5.查看GAP： SQL> select * from v$archive_gap;      THREAD# LOW_SEQUENCE# HIGH_SEQUENCE# ---------- ------------- --------------          1            73             77            SQL> SELECT max(sequence#) from v$archived_log where applied='YES';   MAX(SEQUENCE#) --------------             73 丢失了74-77四个日志     二、恢复备库： 1.在主库上创建一个备库的控制文件： SQL> alter database create standby controlfile as '/home/oracle/standby.ctl';   Database altered.   2.以备库的当前SCN号为起点，在主库上做一个增量备份 查询备库当前SCN： SQL> select current_scn from v$database;   CURRENT_SCN -----------     1248633       确认主备GAP期间是否新增数据文件： SQL> select file# from v$datafile where creation_change# > =1248633; 如果存在新增数据文件，备库恢复时需要先restore新添加的数据文件。   主库根据备库scn号进行增量备份： RMAN> run{ allocate channel c1 type disk; allocate channel c2 type disk; backup INCREMENTAL from scn 1248633 database format '/home/oracle/incre_%U'; release channel c1; release channel c2; } 2> 3> 4> 5> 6> 7> allocated channel: c1 channel c1: SID=52 device type=DISK   allocated channel: c2 channel c2: SID=54 device type=DISK   Starting backup at 10-MAY-22 channel c1: starting full datafile backup set channel c1: specifying datafile(s) in backup set input datafile file number=00001 name=/u01/app/oracle/oradata/rmanpri/system01.dbf input datafile file number=00004 name=/u01/app/oracle/oradata/rmanpri/users01.dbf channel c1: starting piece 1 at 10-MAY-22 channel c2: starting full datafile backup set channel c2: specifying datafile(s) in backup set input datafile file number=00002 name=/u01/app/oracle/oradata/rmanpri/sysaux01.dbf input datafile file number=00003 name=/u01/app/oracle/oradata/rmanpri/undotbs01.dbf channel c2: starting piece 1 at 10-MAY-22 channel c2: finished piece 1 at 10-MAY-22 piece handle=/home/oracle/incre_0u0t5vb9_1_1 tag=TAG20220510T185433 comment=NONE channel c2: backup set complete, elapsed time: 00:01:06 channel c2: starting full datafile backup set channel c2: specifying datafile(s) in backup set including current control file in backup set channel c2: starting piece 1 at 10-MAY-22 channel c2: finished piece 1 at 10-MAY-22 piece handle=/home/oracle/incre_0v0t5vdb_1_1 tag=TAG20220510T185433 comment=NONE channel c2: backup set complete, elapsed time: 00:00:01 channel c1: finished piece 1 at 10-MAY-22 piece handle=/home/oracle/incre_0t0t5vb9_1_1 tag=TAG20220510T185433 comment=NONE channel c1: backup set complete, elapsed time: 00:01:10 Finished backup at 10-MAY-22   released channel: c1   released channel: c2       [oracle@dgdb1 trace]$ ll /home/oracle/ total 20404 -rw-r----- 1 oracle oinstall   221184 May 10 18:55 incre_0t0t5vb9_1_1 -rw-r----- 1 oracle oinstall   344064 May 10 18:55 incre_0u0t5vb9_1_1 -rw-r----- 1 oracle oinstall 10092544 May 10 18:55 incre_0v0t5vdb_1_1 -rw-r----- 1 oracle oinstall 10043392 May 10 18:48 standby.ctl     将增量备份和控制文件拷贝到备库上: [oracle@dgdb1 trace]$ scp /home/oracle/incre_0* dgdb2:/home/oracle oracle@dgdb2's password: incre_0t0t5vb9_1_1                                                                                                              100%  216KB 216.0KB/s   00:00 incre_0u0t5vb9_1_1                                                                                                              100%  336KB 336.0KB/s   00:00 incre_0v0t5vdb_1_1                                                                                                              100% 9856KB   9.6MB/s   00:01 [oracle@dgdb1 trace]$ scp /home/oracle/standby.ctl dgdb2:/home/oracle oracle@dgdb2's password: standby.ctl   [oracle@dgdb2 trace]$ ll /home/oracle/ total 20216 -rw-r----- 1 oracle oinstall   221184 May 11 17:49 incre_0t0t5vb9_1_1 -rw-r----- 1 oracle oinstall   344064 May 11 17:49 incre_0u0t5vb9_1_1 -rw-r----- 1 oracle oinstall 10092544 May 11 17:49 incre_0v0t5vdb_1_1 -rw-r----- 1 oracle oinstall 10043392 May 11 17:50 standby.ctl   备库关闭数据库实例，开启至nomount状态： SQL> alter database recover managed standby database cancel;   Database altered.   SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup nomount ORACLE instance started.   Total System Global Area  584568832 bytes Fixed Size                  2255432 bytes Variable Size             226493880 bytes Database Buffers          352321536 bytes Redo Buffers                3497984 bytes   备库恢复新的控制文件： RMAN> restore controlfile from '/home/oracle/standby.ctl';   Starting restore at 11-MAY-22 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=19 device type=DISK   channel ORA_DISK_1: copied control file copy output file name=/u01/app/oracle/oradata/rmanstd/control01.ctl output file name=/u01/app/oracle/fast_recovery_area/rmanstd/control02.ctl Finished restore at 11-MAY-22   备库开启到mount状态： SQL> alter database mount;   Database altered.   确认取消日志应用: SQL> alter database recover managed standby database cancel;   Database altered.   增量备份注册到RMAN的catalog： RMAN> catalog start with '/home/oracle';   released channel: ORA_DISK_1 Starting implicit crosscheck backup at 11-MAY-22 allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=19 device type=DISK Crosschecked 9 objects Finished implicit crosscheck backup at 11-MAY-22   Starting implicit crosscheck copy at 11-MAY-22 using channel ORA_DISK_1 Crosschecked 4 objects Finished implicit crosscheck copy at 11-MAY-22   searching for all files in the recovery area cataloging files... no files cataloged   searching for all files that match the pattern /home/oracle   List of Files Unknown to the Database ===================================== File Name: /home/oracle/.bashrc File Name: /home/oracle/.bash_logout File Name: /home/oracle/incre_0v0t5vdb_1_1 File Name: /home/oracle/.bash_history File Name: /home/oracle/.oracle/logs/installActions2019-11-04_11-00-39AM.log File Name: /home/oracle/.oracle/logs/oraInstall2019-11-04_11-00-39AM.out File Name: /home/oracle/.oracle/logs/oraInstall2019-11-04_11-00-39AM.err File Name: /home/oracle/.bash_profile File Name: /home/oracle/incre_0u0t5vb9_1_1 File Name: /home/oracle/incre_0t0t5vb9_1_1 File Name: /home/oracle/.kshrc File Name: /home/oracle/standby.ctl File Name: /home/oracle/.viminfo   Do you really want to catalog the above files (enter YES or NO)? yes cataloging files... cataloging done   List of Cataloged Files ======================= File Name: /home/oracle/incre_0v0t5vdb_1_1 File Name: /home/oracle/incre_0u0t5vb9_1_1 File Name: /home/oracle/incre_0t0t5vb9_1_1 File Name: /home/oracle/standby.ctl   备库开启恢复增量备份： RMAN> recover database noredo;   Starting recover at 11-MAY-22 using channel ORA_DISK_1 channel ORA_DISK_1: starting incremental datafile backup set restore channel ORA_DISK_1: specifying datafile(s) to restore from backup set destination for restore of datafile 00001: /u01/app/oracle/oradata/rmanstd/system01.dbf destination for restore of datafile 00004: /u01/app/oracle/oradata/rmanstd/users01.dbf channel ORA_DISK_1: reading from backup piece /home/oracle/incre_0t0t5vb9_1_1 channel ORA_DISK_1: piece handle=/home/oracle/incre_0t0t5vb9_1_1 tag=TAG20220510T185433 channel ORA_DISK_1: restored backup piece 1 channel ORA_DISK_1: restore complete, elapsed time: 00:00:01 channel ORA_DISK_1: starting incremental datafile backup set restore channel ORA_DISK_1: specifying datafile(s) to restore from backup set destination for restore of datafile 00002: /u01/app/oracle/oradata/rmanstd/sysaux01.dbf destination for restore of datafile 00003: /u01/app/oracle/oradata/rmanstd/undotbs01.dbf channel ORA_DISK_1: reading from backup piece /home/oracle/incre_0u0t5vb9_1_1 channel ORA_DISK_1: piece handle=/home/oracle/incre_0u0t5vb9_1_1 tag=TAG20220510T185433 channel ORA_DISK_1: restored backup piece 1 channel ORA_DISK_1: restore complete, elapsed time: 00:00:01   Finished recover at 11-MAY-22   备库开启日志同步进程： SQL> alter database recover managed standby database using current logfile disconnect from session;   Database altered.   查看GAP： SQL> select * from v$archive_gap;   no rows selected     SQL> SELECT max(sequence#) from v$archived_log where applied='YES';   MAX(SEQUENCE#) --------------     主库： SQL> alter system switch logfile;   System altered.   SQL> archive log list Database log mode              Archive Mode Automatic archival             Enabled Archive destination            /oracle/archive Oldest online log sequence     79 Next log sequence to archive   81 Current log sequence           81   备库： SQL> archive log list Database log mode              Archive Mode Automatic archival             Enabled Archive destination            /oracle/archive Oldest online log sequence     79 Next log sequence to archive   0 Current log sequence           81   GAP修复完成。