Verifying the RMAN backup database with the control file
Creating pfile for clone database
Copying Password file for clone database
copy paste listener and tns for each other: prod & clone
Moving backup files to the directories created for the clone database
Connecting Rman and issue the duplicate command
Target database : TEST
Cloned database: TESTDB
Verifying the database name, Backups available in RMAN
SQL> select name,open_mode from v$database;
NAME OPEN_MODE
--------- --------------------
TEST READ WRITE
RMAN> SHOW CONTROLFILE AUTOBACKUP;
using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name TEST are:
CONFIGURE CONTROLFILE AUTOBACKUP ON; # default
RMAN> CROSSCHECK BACKUP OF DATABASE;
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=70 device type=DISK
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/0106mhr1_1_1 RECID=1 STAMP=1080772449
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/090798lu_1_1 RECID=9 STAMP=1081385662
Crosschecked 2 objects
RMAN> list backup of database;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
1 Full 1.19G DISK 00:00:44 16-AUG-21
BP Key: 1 Status: AVAILABLE Compressed: NO Tag: TAG20210816T223409
Piece Name: /u01/app/oracle/product/19.0.0/dbhome_1/dbs/0106mhr1_1_1
List of Datafiles in backup set 1
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- --------- ----------- ------ ----
1 Full 2351179 16-AUG-21 NO /u01/app/oracle/oradata/TEST/system01.dbf
3 Full 2351179 16-AUG-21 NO /u01/app/oracle/oradata/TEST/sysaux01.dbf
4 Full 2351179 16-AUG-21 NO /u01/app/oracle/oradata/TEST/undotbs01.dbf
7 Full 2351179 16-AUG-21 NO /u01/app/oracle/oradata/TEST/users01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
9 Full 1.23G DISK 00:00:51 24-AUG-21
BP Key: 9 Status: AVAILABLE Compressed: NO Tag: TAG20210824T005422
Piece Name: /u01/app/oracle/oradata/TEST/backup/090798lu_1_1
List of Datafiles in backup set 9
File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name
---- -- ---- ---------- --------- ----------- ------ ----
1 Full 2769124 24-AUG-21 NO /u01/app/oracle/oradata/TEST/system01.dbf
3 Full 2769124 24-AUG-21 NO /u01/app/oracle/oradata/TEST/sysaux01.dbf
4 Full 2769124 24-AUG-21 NO /u01/app/oracle/oradata/TEST/undotbs01.dbf
7 Full 2769124 24-AUG-21 NO /u01/app/oracle/oradata/TEST/users01.dbf
Copy Target Database Password File to Auxiliary Database
[oratest@oracle dbs]$ cp orapwtest orapwtestdb
[oratest@oracle oradata]$ mkdir testdb
[oratest@oracle oradata]$ ls
data01.dbf ORCL TEST testdb
Copying the RMAN backup pieces and control file auto backup to Desired location ‘TESTDB’
[oratest@oracle backup]$ cp c-2378581000-20210824/u01/app/oracle/oradata/testdb
[oratest@oracle backup]$ cp c-2378581002021082402/u01/app/oracle/oradata/testdb
[oratest@oracle backup]$ cp 070798lh_1_1 /u01/app/oracle/oradata/testdb
[oratest@oracle backup]$ cp 090798lu_1_1 /u01/app/oracle/oradata/testdb
[oratest@oracle testdb]$ ls -l
total 1319440
-rw-rw----. 1 oratest oratest 10682368 Aug 24 01:01 070798lh_1_1
-rw-rw----. 1 oratest oratest 1318993920 Aug 24 01:02 090798lu_1_1
-rw-rw----. 1 oratest oratest 10715136 Aug 24 01:01 c-2378581000-20210824-01
-rw-rw----. 1 oratest oratest 10715136 Aug 24 01:01 c-2378581000-20210824-02
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /u01/app/oracle/product/19.0.0/dbhome_1/dbs/arch
Oldest online log sequence 10
Next log sequence to archive 12
Current log sequence 12
[oratest@oracle dbs]$ export ORACLE_SID=testdb
[oratest@oracle dbs]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Tue Aug 24 22:33:36 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup pfile='$ORACLE_HOME/dbs/inittestdb.ora' nomount;
ORACLE instance started.
Total System Global Area 281017392 bytes
Fixed Size 8895536 bytes
Variable Size 218103808 bytes
Database Buffers 50331648 bytes
Redo Buffers 3686400 bytes
SQL> exit
[oratest@oracle dbs]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Tue Aug 24 22:54:08 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: TESTDB (not mounted)
RMAN> exit
[oratest@oracle admin]$ rman target sys/oracle@test
Recovery Manager: Release 19.0.0.0.0 - Production on Tue Aug 24 22:55:01 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: TEST (DBID=2378581000)
RMAN> connect auxiliary sys/oracle@testdb
connected to auxiliary database: TESTDB (not mounted)
Making the clone Database in nomount state to Duplicate the Database
[oratest@oracle dbs]$ export ORACLE_SID=testdb
[oratest@oracle dbs]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Tue Aug 24 23:09:52 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
SQL> select status from v$instance;
STATUS
------------
STARTED
[oratest@oracle dbs]$ rman auxiliary /
Recovery Manager: Release 19.0.0.0.0 - Production on Tue Aug 24 23:11:06 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to auxiliary database: TESTDB (not mounted)
RMAN> duplicate target database to testdb backup location
'/u01/app/oracle/oradata/testdb' nofilenamecheck;
Starting Duplicate Db at 24-AUG-21
searching for database ID
found backup of database ID 2378581000
contents of Memory Script:
{
sql clone "create spfile from memory";
}
executing Memory Script
sql statement: create spfile from memory
contents of Memory Script:
{
shutdown clone immediate;
startup clone nomount;
}
executing Memory Script
Oracle instance shut down
connected to auxiliary database (not started)
Oracle instance started
Total System Global Area 281017392 bytes
Fixed Size 8895536 bytes
Variable Size 218103808 bytes
Database Buffers 50331648 bytes
Redo Buffers 3686400 bytes
contents of Memory Script:
{
sql clone "alter system set db_name =
''TEST'' comment=
''Modified by RMAN duplicate'' scope=spfile";
sql clone "alter system set db_unique_name =
''testdb'' comment=
''Modified by RMAN duplicate'' scope=spfile";
shutdown clone immediate;
startup clone force nomount
restore clone primary controlfile from '/u01/app/oracle/oradata/testdb/c-2378581000-20210824-04';
alter clone database mount;
}
executing Memory Script
sql statement: alter system set db_name = ''TEST'' comment= ''Modified by RMAN duplicate'' scope=spfile
sql statement: alter system set db_unique_name = ''testdb'' comment= ''Modified by RMAN duplicate'' scope=spfile
Oracle instance shut down
Oracle instance started
Total System Global Area 281017392 bytes
Fixed Size 8895536 bytes
Variable Size 218103808 bytes
Database Buffers 50331648 bytes
Redo Buffers 3686400 bytes
Starting restore at 24-AUG-21
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=424 device type=DISK
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/u01/app/oracle/oradata/TESTDB/control07.ctl
output file name=/u01/app/oracle/oradata/TESTDB/control08.ctl
Finished restore at 24-AUG-21
database mounted
released channel: ORA_AUX_DISK_1
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=424 device type=DISK
RMAN-05158: WARNING: auxiliary (bctfile) file name /u01/app/oracle/oradata/TEST/changetracking/o1_mf_jl7qx7bp_.chg conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (logfile) file name /u01/app/oracle/oradata/TEST/redo01.log conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (logfile) file name /u01/app/oracle/oradata/TEST/redo02.log conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (logfile) file name /u01/app/oracle/oradata/TEST/redo03.log conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (datafile) file name /u01/app/oracle/oradata/TEST/system01.dbf conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (datafile) file name /u01/app/oracle/oradata/TEST/sysaux01.dbf conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (datafile) file name /u01/app/oracle/oradata/TEST/undotbs01.dbf conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (datafile) file name /u01/app/oracle/oradata/TEST/users01.dbf conflicts with a file used by the target database
RMAN-05158: WARNING: auxiliary (tempfile) file name /u01/app/oracle/oradata/TEST/temp01.dbf conflicts with a file used by the target database
contents of Memory Script:
{
set until scn 2841711;
set newname for datafile 1 to
"/u01/app/oracle/oradata/TEST/system01.dbf";
set newname for datafile 3 to
"/u01/app/oracle/oradata/TEST/sysaux01.dbf";
set newname for datafile 4 to
"/u01/app/oracle/oradata/TEST/undotbs01.dbf";
set newname for datafile 7 to
"/u01/app/oracle/oradata/TEST/users01.dbf";
restore
clone database
;
}
executing Memory Script
executing command: SET until clause
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting restore at 24-AUG-21
using channel ORA_AUX_DISK_1
database opened
Cannot remove created server parameter file
Finished Duplicate Db at 24-AUG-21
RMAN> exit
Recovery Manager complete.
Now the database has been successfully cloned we can verify the Database
SQL> select name,open_mode from v$database;
NAME OPEN_MODE
--------- --------------------
TESTDB READ WRITE
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RMAN> backup archivelog scn between 34535421234 and 67555696397;
Starting backup at 2021/08/22 01:46:29
using channel ORA_DISK_1
specification does not match any archived log in the repository
backup cancelled because there are no files to backup
Finished backup at 2021/08/22 01:46:30
Starting Control File and SPFILE Autobackup at 2021/08/22 01:46:31
piece handle=/backup/oracle/ORACLEAGENT/rman/WWIQDW_autobcf_c-759447934-20210822-05
comment=NONE
Finished Control File and SPFILE Autobackup at 2021/08/22 01:46:38
RMAN> backup current controlfile;
Starting backup at 11-AUG-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
channel ORA_DISK_1: starting piece 1 at 11-AUG-21
channel ORA_DISK_1: finished piece 1 at 11-AUG-21
piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/0m069eu0_1_1
tag=TAG20210811T232448 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 11-AUG-21
Starting Control File and SPFILE Autobackup at 11-AUG-21
piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-1608118455-20210811-09
comment=NONE
Finished Control File and SPFILE Autobackup at 11-AUG-21
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SQL> select name from v$controlfile;
NAME
------------------------------------------------------------------
/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_.ctl
/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_1.ctl
SQL> alter system set control_files= '/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_.ctl', '/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_1.ctl', '/u01/app/oracle/oradata/TRAINING/control01.dbf' scope=spfile;
System altered.
SQL> startup
ORACLE instance started.
Total System Global Area 2432695144 bytes
Fixed Size 8899432 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7876608 bytes
Database mounted.
Database opened.
SQL> select name from v$controlfile;
NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_.ctl
/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_1.ctl
/u01/app/oracle/oradata/TRAINING/control01.dbf
SQL> create pfile from spfile;
File created.
MULTIPLEXING USING PFILE
Multiplexing is the process of mintaining a copy of same control files on different disk drivers (and idealy on different controllers). To multiplex your control files, we copy the control file to multiple locations and change the CONTROL_FILES parameter in the text based initialization file init.ora to include all control files names.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> exit
Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0
[oracle@training ~]$ cd $ORACLE_HOME/dbs
[oracle@training dbs]$ vi inittraining.ora
*.control_files='/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_.ctl', '/u01/app/oracle/oradata/TRAINING/controlfile/o1_mf_j9bdm6dk_1.ctl', '/u01/app/oracle/oradata/TRAINING/control01.dbf'
[oracle@training dbs]$ cp /u01/app/oracle/oradata/TRAINING/control01.dbf /u01/app/oracle/oradata/TRAINING/control02.dbf
[oracle@training dbs]$ sqlplus / as sysdba
SQL> startup pfile=$ORACLE_HOME/dbs/inittraining1.ora
ORACLE instance started.
Total System Global Area 2432695144 bytes
Fixed Size 8899432 bytes
Variable Size 536870912 bytes
Database Buffers 1879048192 bytes
Redo Buffers 7876608 bytes
Database mounted.
Database opened.
SQL> select name from v$controlfile;
NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/TRAINING1/controlfile/o1_mf_j9bdm6dk_.ctl
/u01/app/oracle/oradata/TRAINING1/controlfile/o1_mf_j9bdm6dk_1.ctl
/u01/app/oracle/oradata/TRAINING1/control01.dbf
/u01/app/oracle/oradata/TRAINING1/control02.dbf
SQL> create spfile from pfile;
File created.
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In this article we are going to see how to restore a loss of controlfile using autobackup.
Step 1:- Check the RMAN configuration and controlfile autobackup feature is ON.
[oracle@localhost scripts]$ . ora19c.env
[oracle@localhost scripts]$ rman target /
Recovery Manager: Release 19.0.0.0.0 – Production on Sun Jan 31 12:56:58 2021
Version 19.10.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: INBAA (DBID=936024966)
RMAN> show all;
using target database control file instead of recovery catalog
RMAN configuration parameters for database with db_unique_name INBAA are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default CONFIGURE CONTROLFILE AUTOBACKUP ON; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO ‘%F’; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM ‘AES128’; # default
CONFIGURE COMPRESSION ALGORITHM ‘BASIC’ AS OF RELEASE ‘DEFAULT’ OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE RMAN OUTPUT TO KEEP FOR 7 DAYS; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO ‘/u01/app/oracle/product/19.0.0/dbs/snapcf_inbaa.f’; # default
RMAN>
Step 2:- Simulate a failure to remove the controlfile when the database is running.
[oracle@localhost scripts]$ . ora19c.env
[oracle@localhost scripts]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 – Production on Sun Jan 31 12:55:02 2021
Version 19.10.0.0.0
Copyright (c) 1982, 2020, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 3019895280 bytes
Fixed Size 8901104 bytes
Variable Size 738197504 bytes
Database Buffers 2264924160 bytes
Redo Buffers 7872512 bytes
Database mounted.
Database opened.
SQL> select open_mode,name from v$database;
OPEN_MODE NAME
READ WRITE INBAA
SQL> select name from v$controlfile;
SQL> !
[oracle@localhost scripts]$ cd
[oracle@localhost ~]$ cd /u01/app/oracle/oradata/INBAA/
[oracle@localhost INBAA]$ ls
control01.ctl redo01.log redo02.log redo03.log sysaux01.dbf system01.dbf temp01.dbf undotbs01.dbf users01.dbf
[oracle@localhost INBAA]$ rm -rf control01.ctl
[oracle@localhost INBAA]$ cd
[oracle@localhost ~]$ cd /u01/app/oracle/recovery_area/INBAA/
[oracle@localhost INBAA]$ ls
archivelog autobackup backupset control02.ctl onlinelog
[oracle@localhost INBAA]$ rm -rf control02.ctl
[oracle@localhost INBAA]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 – Production on Sun Jan 31 13:09:30 2021
Version 19.10.0.0.0
Copyright (c) 1982, 2020, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 – Production
Version 19.10.0.0.0
SQL>
SQL> select tablespace_name from dba_data_files;
select tablespace_name from dba_data_files
*
ERROR at line 1:
ORA-00210: cannot open the specified control file
ORA-00202: control file: ‘/u01/app/oracle/oradata/INBAA/control01.ctl’
ORA-27041: unable to open file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
SQL>
SQL> select status from v$instance;
STATUS
OPEN
SQL>
SQL> shut immediate
ORA-00210: cannot open the specified control file
ORA-00202: control file: ‘/u01/app/oracle/oradata/INBAA/control01.ctl’
ORA-27041: unable to open file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
SQL> shut abort
ORACLE instance shut down.
SQL>
Step 3:- Keep the database in NOMOUNT stage and restore the controlfile
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 3019895280 bytes
Fixed Size 8901104 bytes
Variable Size 738197504 bytes
Database Buffers 2264924160 bytes
Redo Buffers 7872512 bytes
SQL> Step 4:- Since we are not using a RMAN catalog we need to set the DBID
Recovery Manager: Release 19.0.0.0.0 – Production on Sun Jan 31 13:16:07 2021
Version 19.10.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: INBAA (not mounted)
RMAN> set dbid=936024966;
executing command: SET DBID
RMAN> restore controlfile from autobackup;
Starting restore at 31-JAN-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=38 device type=DISK
recovery area destination: /u01/app/oracle/recovery_area
database name (or database unique name) used for search: INBAA
channel ORA_DISK_1: AUTOBACKUP /u01/app/oracle/recovery_area/INBAA/autobackup/2021_01_28/o1_mf_s_1063052742_j15n3h5b_.bkp found in the recovery area
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20210131
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20210130
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20210129
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20210128
channel ORA_DISK_1: restoring control file from AUTOBACKUP /u01/app/oracle/recovery_area/INBAA/autobackup/2021_01_28/o1_mf_s_1063052742_j15n3h5b_.bkp
channel ORA_DISK_1: control file restore from AUTOBACKUP complete
output file name=/u01/app/oracle/oradata/INBAA/control01.ctl
output file name=/u01/app/oracle/recovery_area/INBAA/control02.ctl
Finished restore at 31-JAN-21
RMAN>
Step 5:- Mount and recover the database
RMAN> alter database mount;
released channel: ORA_DISK_1
Statement processed
RMAN>
RMAN> recover database;
Starting recover at 31-JAN-21
Starting implicit crosscheck backup at 31-JAN-21
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=44 device type=DISK
Crosschecked 10 objects
Finished implicit crosscheck backup at 31-JAN-21
Starting implicit crosscheck copy at 31-JAN-21
using channel ORA_DISK_1
Finished implicit crosscheck copy at 31-JAN-21
searching for all files in the recovery area
cataloging files...
cataloging done
List of Cataloged Files
=======================
File Name: /u01/app/oracle/recovery_area/INBAA/autobackup/2021_01_28/o1_mf_s_1063052742_j15n3h5b_.bkp
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 1 is already on disk as file /u01/app/oracle/oradata/INBAA/redo01.log
archived log file name=/u01/app/oracle/oradata/INBAA/redo01.log thread=1 sequence=1
media recovery complete, elapsed time: 00:00:01
Finished recover at 31-JAN-21
RMAN>
Step 7:- Open the database using resetlogs option
RMAN> alter database open resetlogs;
Statement processed
RMAN>
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 3019895280 bytes
Fixed Size 8901104 bytes
Variable Size 738197504 bytes
Database Buffers 2264924160 bytes
Redo Buffers 7872512 bytes
SQL> select open_mode,name from v$database;
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