环境:
OS:Centos 7
DB:12.2.0.1
1.备份数据库
run
{
allocate channel ch1 device type disk;
backup as compressed backupset full filesperset 5 database format '/u01/rman_backup/db_fullbackup_%d_%s_%p_%T';
sql 'alter system archive log current';
backup current controlfile format '/u01/rman_backup/ctl_%d_%s_%p_%T';
backup spfile format '/u01/rman_backup/spfile_%d_%s_%p_%T';
release channel ch1;
crosscheck backup;
crosscheck archivelog all;
delete noprompt expired backup;
delete noprompt obsolete;
}
备份完成后的归档日志若是删除的的话，恢复的时候会找不备份信息,如下:
RMAN> run{
2> set until sequence 2;
3> restore database preview;
4> }
executing command: SET until clause
Starting restore at 2019-12-11 04:07:48
using channel ORA_DISK_1
datafile 12 will be created automatically during restore operation
datafile 13 will be created automatically during restore operation
datafile 14 will be created automatically during restore operation
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 12/11/2019 04:07:48
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 11 found to restore
RMAN-06023: no backup or copy of datafile 10 found to restore
RMAN-06023: no backup or copy of datafile 9 found to restore
RMAN-06023: no backup or copy of datafile 7 found to restore
RMAN-06023: no backup or copy of datafile 4 found to restore
RMAN-06023: no backup or copy of datafile 3 found to restore
RMAN-06023: no backup or copy of datafile 1 found to restore
2.切换生成多个logfile
SQL> connect / as sysdba
Connected.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /u01/app/oracle/archive_log
Oldest online log sequence 1
Next log sequence to archive 3
Current log sequence 3
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
3.模拟手工删除数据一个归档日志
[oracle@localhost archive_log]$ ls -al
total 4672
drwxr-xr-x. 2 oracle oinstall 136 Dec 11 03:27 .
drwxr-xr-x. 11 oracle oinstall 151 Dec 6 04:18 ..
-rw-r-----. 1 oracle oinstall 4765696 Dec 11 03:25 1_2_1026700907.dbf
-rw-r-----. 1 oracle oinstall 3072 Dec 11 03:27 1_3_1026700907.dbf
-rw-r-----. 1 oracle oinstall 1024 Dec 11 03:27 1_4_1026700907.dbf
-rw-r-----. 1 oracle oinstall 1024 Dec 11 03:27 1_5_1026700907.dbf
-rw-r-----. 1 oracle oinstall 1024 Dec 11 03:27 1_6_1026700907.dbf
[oracle@localhost archive_log]$ rm 1_4_1026700907.dbf
这里我们删除了4这个归档日志
rm 1_4_1026700907.dbf
4.可恢复性检查
|
RMAN> run{
2> set until sequence 4; ##这里不包含归档日志4
3> restore database preview;
4> }
executing command: SET until clause
Starting restore at 2019-12-11 03:39:43
using channel ORA_DISK_1
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
64 Full 375.04M DISK 00:00:41 2019-12-11 03:24:37
BP Key: 64 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_71_1_20191211
List of Datafiles in backup set 64
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
1 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/system01.dbf
3 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/sysaux01.dbf
4 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/undotbs01.dbf
7 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/users01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
65 Full 165.62M DISK 00:00:17 2019-12-11 03:24:55
BP Key: 65 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_72_1_20191211
List of Datafiles in backup set 65
Container ID: 2, PDB Name: PDB$SEED
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
5 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/system01.dbf
6 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/sysaux01.dbf
8 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/undotbs01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
67 Full 54.10M DISK 00:00:06 2019-12-11 03:25:28
BP Key: 67 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_74_1_20191211
List of Datafiles in backup set 67
Container ID: 3, PDB Name: ORA12CPDB1
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
9 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/system01.dbf
11 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/undotbs01.dbf
13 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA13.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
66 Full 115.23M DISK 00:00:14 2019-12-11 03:25:21
BP Key: 66 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_73_1_20191211
List of Datafiles in backup set 66
Container ID: 3, PDB Name: ORA12CPDB1
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
10 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/sysaux01.dbf
12 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/users01.dbf
14 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA14.dbf
List of Archived Log Copies for database with db_unique_name ORA12C
=====================================================================
Key Thrd Seq S Low Time
------- ---- ------- - -------------------
58 1 2 A 2019-12-11 02:43:10
Name: /u01/app/oracle/archive_log/1_2_1026700907.dbf
59 1 3 A 2019-12-11 03:25:35
Name: /u01/app/oracle/archive_log/1_3_1026700907.dbf
recovery will be done up to SCN 2287678
Media recovery start SCN is 2287488
Recovery must be done beyond SCN 2287536 to clear datafile fuzziness
Finished restore at 2019-12-11 03:39:44
说明可以恢复，2和3归档都存在,下面我们验证恢复到归档日志5看下什么情况
RMAN> run{
2> set until sequence 5;
3> restore database preview;
4> }
executing command: SET until clause
Starting restore at 2019-12-11 03:40:22
using channel ORA_DISK_1
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
64 Full 375.04M DISK 00:00:41 2019-12-11 03:24:37
BP Key: 64 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_71_1_20191211
List of Datafiles in backup set 64
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
1 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/system01.dbf
3 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/sysaux01.dbf
4 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/undotbs01.dbf
7 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/users01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
65 Full 165.62M DISK 00:00:17 2019-12-11 03:24:55
BP Key: 65 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_72_1_20191211
List of Datafiles in backup set 65
Container ID: 2, PDB Name: PDB$SEED
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
5 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/system01.dbf
6 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/sysaux01.dbf
8 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/undotbs01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
67 Full 54.10M DISK 00:00:06 2019-12-11 03:25:28
BP Key: 67 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_74_1_20191211
List of Datafiles in backup set 67
Container ID: 3, PDB Name: ORA12CPDB1
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
9 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/system01.dbf
11 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/undotbs01.dbf
13 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA13.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ -------------------
66 Full 115.23M DISK 00:00:14 2019-12-11 03:25:21
BP Key: 66 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356
Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_73_1_20191211
List of Datafiles in backup set 66
Container ID: 3, PDB Name: ORA12CPDB1
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- ------------------- ----------- ------ ----
10 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/sysaux01.dbf
12 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/users01.dbf
14 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA14.dbf
no backup of archived log for thread 1 with sequence 4 and starting SCN of 2287678 found to restore ##提示说用到归档日志4，但是我们的归档日志4已经删除了，所以不能恢复到5
List of Archived Log Copies for database with db_unique_name ORA12C
=====================================================================
Key Thrd Seq S Low Time
------- ---- ------- - -------------------
58 1 2 A 2019-12-11 02:43:10
Name: /u01/app/oracle/archive_log/1_2_1026700907.dbf
59 1 3 A 2019-12-11 03:25:35
Name: /u01/app/oracle/archive_log/1_3_1026700907.dbf
recovery will be done up to SCN 2287682
Media recovery start SCN is 2287488
Recovery must be done beyond SCN 2287536 to clear datafile fuzziness
Finished restore at 2019-12-11 03:40:22
|
5.关闭数据库并启动到mount状态
RMAN> shutdown immediate
RMAN> startup mount
6.进行不完全恢复
run{
set until sequence 4;
restore database;
recover database;
}
7.resetlogs打开数据库
RMAN> alter database open resetlogs;
Statement processed