Oracle RMAN 备份及不完全恢复(删除archievelog)
RMAN备份命令
|
backup Database format='/home/oracle/backup/bak_full_%U_%T' tag='bak_full'; |
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
[oracle@ocp 2016_06_18]$ rm o1_mf_1_12_cpb2xhg8_.arc
[oracle@ocp 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
|
RMAN> recover datafile 6; Starting recover at 18-JUN-16 starting media recovery archived log for thread 1 with sequence 13 is already on disk as file /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_13_cpb35zgs_.arc |
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;
|
RMAN> run { executing command: SET until clause Starting restore at 18-JUN-16 channel ORA_DISK_1: starting datafile backup set restore RMAN> run { executing command: SET until clause Starting recover at 18-JUN-16 starting media recovery channel ORA_DISK_1: starting archived log restore to default destination RMAN> alter database open resetlogs; database opened |
用scott/tiger登录后查看,发现插入的数据不在了.
打开后,需要重新备份数据库,备份前需要删除原有多余的backup set及archivelog
RMAN> configure retention policy to redundancy 1;
new RMAN configuration parameters:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
new RMAN configuration parameters are successfully stored
RMAN> crosscheck backup;
using channel ORA_DISK_1
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_nnndf_TAG20160616T164736_cp4sx8fp_.bkp RECID=1 STAMP=914690856
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_ncsnf_TAG20160616T164736_cp4sznlh_.bkp RECID=2 STAMP=914690932
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_annnn_TAG20160616T165323_cp4t83nk_.bkp RECID=3 STAMP=914691203
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_annnn_TAG20160616T165445_cp4tbogp_.bkp RECID=4 STAMP=914691285
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/back_full_05r8fcon_1_1_20160618 RECID=5 STAMP=914862871
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/back_full_06r8fcr2_1_1_20160618 RECID=6 STAMP=914862947
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/arch_07r8fcti_1_1_20160618 RECID=7 STAMP=914863026
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/back_ctl_08r8fd2c_1_1_20160618 RECID=8 STAMP=914863181
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/back_spfile_09r8fd3n_1_1_20160618 RECID=9 STAMP=914863223
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/bak_ctl_0ar8i7jh_1_1_20160619 RECID=10 STAMP=914955890
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/bak_full_0br8i7kj_1_1_20160619 RECID=11 STAMP=914955923
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/home/oracle/backup/bak_full_0cr8i7mk_1_1_20160619 RECID=12 STAMP=914955989
Crosschecked 12 objects
RMAN> report obsolete;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
Report of obsolete backups and copies
Type Key Completion Time Filename/Handle
-------------------- ------ ------------------ --------------------
Backup Set 1 16-JUN-16
Backup Piece 1 16-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_nnndf_TAG20160616T164736_cp4sx8fp_.bkp
Backup Set 2 16-JUN-16
Backup Piece 2 16-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_ncsnf_TAG20160616T164736_cp4sznlh_.bkp
Backup Set 3 16-JUN-16
Backup Piece 3 16-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_annnn_TAG20160616T165323_cp4t83nk_.bkp
Backup Set 4 16-JUN-16
Backup Piece 4 16-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/backupset/2016_06_16/o1_mf_annnn_TAG20160616T165445_cp4tbogp_.bkp
Backup Set 5 18-JUN-16
Backup Piece 5 18-JUN-16 /home/oracle/backup/back_full_05r8fcon_1_1_20160618
Backup Set 6 18-JUN-16
Backup Piece 6 18-JUN-16 /home/oracle/backup/back_full_06r8fcr2_1_1_20160618
Backup Set 7 18-JUN-16
Backup Piece 7 18-JUN-16 /home/oracle/backup/arch_07r8fcti_1_1_20160618
Backup Set 8 18-JUN-16
Backup Piece 8 18-JUN-16 /home/oracle/backup/back_ctl_08r8fd2c_1_1_20160618
Archive Log 7 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_12_cpb2xhg8_.arc
Backup Set 9 18-JUN-16
Backup Piece 9 18-JUN-16 /home/oracle/backup/back_spfile_09r8fd3n_1_1_20160618
Archive Log 8 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_13_cpb35zgs_.arc
Archive Log 9 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_14_cpb36dbo_.arc
Archive Log 10 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_15_cpb37ff2_.arc
Archive Log 21 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_16_cpb4d2gl_.arc
Archive Log 23 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_15_cpb4d2jt_.arc
Archive Log 22 18-JUN-16 /u01/app/oracle/flash_recovery_area/ORCL/archivelog/2016_06_18/o1_mf_1_14_cpb4d2jn_.arc
Backup Set 10 19-JUN-16
Backup Piece 10 19-JUN-16 /home/oracle/backup/bak_ctl_0ar8i7jh_1_1_20160619
RMAN> delete obsolete
crosscheck archivelog all;
delete noprompt expired archivelog all;
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