RMAN specified backup set Recovery

Today, I encountered a problem when I was doing database restoration. I had two backup sets under the directory. I wanted to specify a backup set for restoration. I checked the information and made a simple experiment record:

RMAN> run {
2> allocate channel a1 type disk;
3> allocate channel a2 type disk;
4>Backup database format = '/home/Oracle/backup/db_arch _ % U ';
5> release channel a1;
6> release channel a2;
7>}

Released channel: ORA_DISK_1
Allocated channel: a1
Channel a1: sid = 144 devtype = DISK

Allocated channel: a2
Channel a2: sid = 148 devtype = DISK

Starting backup at 02-JUL-11
Channel a1: starting full datafile backupset
Channel a1: specifying datafile (s) in backupset
Input datafile fno = 00001 name =/home/oracle/app/oracle/oradata/zwh/system01.dbf
Input datafile fno = 00003 name =/home/oracle/app/oracle/oradata/zwh/sysaux01.dbf
Channel a1: starting piece 1 at 02-JUL-11
Channel a2: starting full datafile backupset
Channel a2: specifying datafile (s) in backupset
Input datafile fno = 00002 name =/home/oracle/app/oracle/oradata/zwh/undotbs01.dbf
Input datafile fno = 00004 name =/home/oracle/app/oracle/oradata/zwh/users01.dbf
Channel a2: starting piece 1 at 02-JUL-11
Channel a2: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup/db_arch_6kmgfc5a_1_1 tag = TAG20110702T231137 comment = NONE
Channel a2: backup set complete, elapsed time: 00:00:07
Channel a2: starting full datafile backupset
Channel a2: specifying datafile (s) in backupset
Including current control file in backupset
Channel a2: starting piece 1 at 02-JUL-11
Channel a2: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup/db_arch_6lmgfc5i_1_1 tag = TAG20110702T231137 comment = NONE
Channel a2: backup set complete, elapsed time: 00:00:07
Channel a2: starting full datafile backupset
Channel a2: specifying datafile (s) in backupset
Including current SPFILE in backupset
Channel a2: starting piece 1 at 02-JUL-11
Channel a2: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup/db_arch_6mmgfc5q_1_1 tag = TAG20110702T231137 comment = NONE
Channel a2: backup set complete, elapsed time: 00:00:08
Channel a1: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup/db_arch_6jmgfc5a_1_1 tag = TAG20110702T231137 comment = NONE
Channel a1: backup set complete, elapsed time: 00:00:59
Finished backup at 02-JUL-11

Released channel: a1

Released channel: a2

 

At this time, I deleted two records under the scott user. The tablespace is users, which is used for recovery comparison ~

RMAN> run {
2> allocate channel a1 type disk;
3> allocate channel a2 type disk;
4>Backup database format = '/home/oracle/backup2/db2_arch _ % U ';
5> release channel a1;
6> release channel a2;
7>}

Using target database control file instead of recovery catalog
Allocated channel: a1
Channel a1: sid = 141 devtype = DISK

Allocated channel: a2
Channel a2: sid = 143 devtype = DISK

Starting backup at 02-JUL-11
Channel a1: starting full datafile backupset
Channel a1: specifying datafile (s) in backupset
Input datafile fno = 00001 name =/home/oracle/app/oracle/oradata/zwh/system01.dbf
Input datafile fno = 00003 name =/home/oracle/app/oracle/oradata/zwh/sysaux01.dbf
Channel a1: starting piece 1 at 02-JUL-11
Channel a2: starting full datafile backupset
Channel a2: specifying datafile (s) in backupset
Input datafile fno = 00002 name =/home/oracle/app/oracle/oradata/zwh/undotbs01.dbf
Input datafile fno = 00004 name =/home/oracle/app/oracle/oradata/zwh/users01.dbf
Channel a2: starting piece 1 at 02-JUL-11
Channel a2: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup2/db2_arch_6omgfciq_1_1 tag = TAG20110702T231850 comment = NONE
Channel a2: backup set complete, elapsed time: 00:00:07
Channel a2: starting full datafile backupset
Channel a2: specifying datafile (s) in backupset
Including current control file in backupset
Channel a2: starting piece 1 at 02-JUL-11
Channel a2: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup2/db2_arch_6pmgfcj3_1_1 tag = TAG20110702T231850 comment = NONE
Channel a2: backup set complete, elapsed time: 00:00:13
Channel a2: starting full datafile backupset
Channel a2: specifying datafile (s) in backupset
Including current SPFILE in backupset
Channel a2: starting piece 1 at 02-JUL-11
Channel a2: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup2/db2_arch_6qmgfcjj_1_1 tag = TAG20110702T231850 comment = NONE
Channel a2: backup set complete, elapsed time: 00:00:04
Channel a1: finished piece 1 at 02-JUL-11
Piece handle =/home/oracle/backup2/db2_arch_6nmgfciq_1_1 tag = TAG20110702T231850 comment = NONE
Channel a1: backup set complete, elapsed time: 00:00:54
Finished backup at 02-JUL-11

Released channel: a1

Released channel: a2

RMAN> list backup of database;

Using target database control file instead of recovery catalog

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

BS Key Type LV Size Device Type Elapsed Time Completion Time
-------------------------------------------------------------
201 Full 24.06 m disk 00:00:05 02-JUL-11
Back Propagation Key: 201 Status: AVAILABLE Compressed: NO Tag:TAG20110702T231137
Piece Name:/home/oracle/backup/db_arch_6kmgfc5a_1_1 -- directory of the first backup set
List of Datafiles in backup set 201
File LV Type Ckp SCN Ckp Time Name
---------------------------------
2 Full 1645604 02-JUL-11/home/oracle/app/oracle/oradata/zwh/undotbs01.dbf
4 Full164560402-JUL-11/home/oracle/app/oracle/oradata/zwh/users01.dbf

BS Key Type LV Size Device Type Elapsed Time Completion Time
-------------------------------------------------------------
204 Full 568.33 m disk 00:00:52 02-JUL-11
BP Key: 204 Status: AVAILABLE Compressed: NO Tag: TAG20110702T231137
Piece Name:/home/oracle/backup/db_arch_6jmgfc5a_1_1
List of Datafiles in backup set 204
File LV Type Ckp SCN Ckp Time Name
---------------------------------
1 Full 1645603 02-JUL-11/home/oracle/app/oracle/oradata/zwh/system01.dbf
3 Full 1645603 02-JUL-11/home/oracle/app/oracle/oradata/zwh/sysaux01.dbf

BS Key Type LV Size Device Type Elapsed Time Completion Time
-------------------------------------------------------------
205 Full 24.06 m disk 00:00:03 02-JUL-11
Back Propagation Key: 205 Status: AVAILABLE Compressed: NO Tag:TAG20110702T231850
Piece Name:/home/oracle/backup2/db2_arch_6omgfciq_1_1 -- directory of the second backup set
List of Datafiles in backup set 205
File LV Type Ckp SCN Ckp Time Name
---------------------------------
2 Full 1645939 02-JUL-11/home/oracle/app/oracle/oradata/zwh/undotbs01.dbf
4 Full 1645939 02-JUL-11/home/oracle/app/oracle/oradata/zwh/users01.dbf

BS Key Type LV Size Device Type Elapsed Time Completion Time
-------------------------------------------------------------
208 Full 568.33 m disk 00:00:53 02-JUL-11
Back Propagation Key: 208 Status: AVAILABLE Compressed: NO Tag: TAG20110702T231850
Piece Name:/home/oracle/backup2/db2_arch_6nmgfciq_1_1
List of Datafiles in backup set 208
File LV Type Ckp SCN Ckp Time Name
---------------------------------
1 Full 1645938 02-JUL-11/home/oracle/app/oracle/oradata/zwh/system01.dbf
3 Full 1645938 02-JUL-11/home/oracle/app/oracle/oradata/zwh/sysaux01.dbf

RMAN> run {
2> set until scn = 1645604; -- the execution is not completely restored.
3> restore database from tag = 'tag20110702t231137 '; -- specify the tag value of the backup set, which can be found in list backup of database.
4> recover database;
5> SQL 'alter database open resetlogs ';
6>}

Starting restore at 03-JUL-11
Using target database control file instead of recovery catalog
Allocated channel: ORA_DISK_1
Channel ORA_DISK_1: sid = 157 devtype = DISK

Channel ORA_DISK_1: starting datafile backupset restore
Channel ORA_DISK_1: specifying datafile (s) to restore from backup set
Restoring datafile 00002 to/home/oracle/app/oracle/oradata/zwh/undotbs01.dbf
Restoring datafile 00004 to/home/oracle/app/oracle/oradata/zwh/users01.dbf
Channel ORA_DISK_1: reading from backup piece/home/oracle/backup/db_arch_6kmgfc5a_1_1 -- read from the first backup set
Channel ORA_DISK_1: restored backup piece 1
Piece handle =/home/oracle/backup/db_arch_6kmgfc5a_1_1 tag = TAG20110702T231137
Channel ORA_DISK_1: restore complete, elapsed time: 00:00:15
Channel ORA_DISK_1: starting datafile backupset restore
Channel ORA_DISK_1: specifying datafile (s) to restore from backup set
Restoring datafile 00001 to/home/oracle/app/oracle/oradata/zwh/system01.dbf
Restoring datafile 00003 to/home/oracle/app/oracle/oradata/zwh/sysaux01.dbf
Channel ORA_DISK_1: reading from backup piece/home/oracle/backup/db_arch_6jmgfc5a_1_1
Channel ORA_DISK_1: restored backup piece 1
Piece handle =/home/oracle/backup/db_arch_6jmgfc5a_1_1 tag = TAG20110702T231137
Channel ORA_DISK_1: restore complete, elapsed time: 00:00:55
Finished restore at 03-JUL-11

Starting recover at 03-JUL-11
Using channel ORA_DISK_1

Starting media recovery

Archive log thread 1 sequence 96 is already on disk as file/home/oracle/app/oracle/flash_recovery_area/ZWH/archivelog/201%07_02/o%mf_%96_70ygz9cv _. arc
Archive log filename =/home/oracle/app/oracle/flash_recovery_area/ZWH/archivelog/201%07_02/o%mf_%96_70ygz9cv _. arc thread = 1 sequence = 96
Media recovery complete, elapsed time: 00:00:04
Finished recover at 03-JUL-11