Oracle RMAN 备份及不完全恢复(删除archievelog)

RMAN备份命令

备份完后插入测试数据

insert into zz values(2); commit;

insert into qq values(2); commit;

然后通过alter system switch logfile多切几次归档,切出多个归档文件

o1_mf_1_12_cpb2xhg8_.arc o1_mf_1_14_cpb36dbo_.arc
o1_mf_1_13_cpb35zgs_.arc o1_mf_1_15_cpb37ff2_.arc

删除12和14文件

[[email protected] 2016_06_18]$ rm o1_mf_1_12_cpb2xhg8_.arc
[[email protected] 2016_06_18]$ rm o1_mf_1_14_cpb36dbo_.arc

通过在RMAN中运行处理使得报错

run {

sql‘alter database datafile 6 offline‘;

restore datafile 6;

recover datafile 6;

sql‘alter database datafile 6 online‘;

}

错误为

查看archieve目录,发现确实只有

o1_mf_1_13_cpb35zgs_.arc  o1_mf_1_15_cpb37ff2_.arc

查看v$log,得到最后需要应用的日志文件应该是16

SQL> select group#,sequence#,status from v$log;

GROUP# SEQUENCE# STATUS
---------- ---------- ----------------
1 16 CURRENT
2 14 INACTIVE
3 15 INACTIVE

被还原的6号文件的scn为

SQL> select file#,change# from v$recover_file;

FILE# CHANGE#
---------- ----------
6 1080514

查看v$log_history得知需要从10号文件开始恢复

SQL> select sequence# from v$log_history where 1080514 between first_change# and next_change#-1;

SEQUENCE#
----------
10

RMAN> list backup of archivelog all;

List of Backup Sets
===================

BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
3 61.04M DISK 00:00:03 16-JUN-16
BP Key: 3 Status: AVAILABLE Compressed: NO Tag: TAG20160616T165323
Piece Name: /u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_annnn_TAG20160616T165323_cp4t83nk_.bkp

List of Archived Logs in backup set 3
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 6 1022418 08-JUN-16 1033516 16-JUN-16
1 7 1033516 16-JUN-16 1047305 16-JUN-16

BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
4 61.05M DISK 00:00:02 16-JUN-16
BP Key: 4 Status: AVAILABLE Compressed: NO Tag: TAG20160616T165445
Piece Name: /u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_annnn_TAG20160616T165445_cp4tbogp_.bkp

List of Archived Logs in backup set 4
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 6 1022418 08-JUN-16 1033516 16-JUN-16
1 7 1033516 16-JUN-16 1047305 16-JUN-16
1 8 1047305 16-JUN-16 1047358 16-JUN-16

BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
7 61.02M DISK 00:00:03 18-JUN-16
BP Key: 7 Status: AVAILABLE Compressed: NO Tag: ARC_BACK
Piece Name: /home/oracle/backup/arch_07r8fcti_1_1_20160618

List of Archived Logs in backup set 7
Thrd Seq Low SCN Low Time Next SCN Next Time
---- ------- ---------- --------- ---------- ---------
1 9 1047358 16-JUN-16 1071119 16-JUN-16
1 10 1071119 16-JUN-16 1080684 18-JUN-16
1 11 1080684 18-JUN-16 1080714 18-JUN-16

备份级里面有6,7,8,9,10,11,6号文件test01.dbf需要的是从10号archivelog开始,但需要恢复到16号文件,目前缺少12,14文件.

查找一下12-14文件的位置,进行确认.

RMAN> list archivelog low sequence 12 high sequence 14

2> ;

List of Archived Log Copies for database with db_unique_name ORCL
=====================================================================

Key Thrd Seq S Low Time
------- ---- ------- - ---------
7 1 12 A 18-JUN-16
Name: /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_12_cpb2xhg8_.arc

8 1 13 A 18-JUN-16
Name: /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_13_cpb35zgs_.arc

9 1 14 A 18-JUN-16
Name: /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_14_cpb36dbo_.arc

只能不完全恢复到12

shutdown abort;

starup force mount;

用scott/tiger登录后查看,发现插入的数据不在了.