Oracle Database Restore Point

ORACLE DATABASE RESTORE POINT

Description : In this blog, we are going to see the Oracle database restore point and its types with the demo.Normal Restore Point:

A normal restore point enables you to flash the database back to a restore point within the time determined by DB_FLASHBACK_RETENTION_TARGET initialization parameter setting.
A normal restore point can be dropped explicitly.
The control files stores name of the restore point and the SCN.

Guaranteed restore point:

A guaranteed restore point enables you to flash the database back to the restore point regardless of DB_FLASHBACK_RETENTION_TARGET initialization parameter setting.
Guaranteed restore point must be dropped explicitly by the user using the DROP RESTORE POINT command.
Guaranteed restore point never ages out.

Normal Restore Point Demo:Must DB in archive log mode.SQL> archive log list; Database log mode Archive Mode Automatic archival EnabledCheck available restore point: SQL> select name from v$restore_point; no rows selectedCreate a normal restore point: SQL> create restore point res_test; Restore point created.View the created restore point: SQL> select name from v$restore_point; NAME ——————– RES_TESTAfter the creation of the restore point creates a table. SQL> create table test as select * from dba_users; Table created.Check the RVWR process status. In normal restore point no background process are started. [oracle@primary ~]$ ps -ef |grep -i rvwr oracle 16948 14963 0 09:40 pts/2 00:00:00 grep –color=auto -i rvwrFlashback the restore point: SQL> flashback database to restore point res_test; Flashback complete.Guaranteed Restore Point Demo:Create guarantee restore point: SQL> create restore point res_test1 guarantee flashback database; Restore point created.RVWR back ground process can be started automatically. [oracle@primary ~]$ ps -ef |grep -i rvwr oracle 17014 1 0 09:41 ? 00:00:00 ora_rvwr_orcl oracle 17060 14963 0 09:42 pts/2 00:00:00 grep –color=auto -i rvwr [oracle@primary ~]$Check the flashback status: SQL> select flashback_on from v$database; FLASHBACK_ON —————— RESTORE POINT ONLYAutomatically create flashback logs: [oracle@primary ORCL]$ cd flashback/ [oracle@primary flashback]$ ls o1_mf_jtotn2c3_.flb o1_mf_jtotn8d4_.flbDrop restore point the logs will be removed. SQL> drop restore point res_test1; Restore point dropped. [oracle@primary ~]$ cd /u01/app/oracle/fast_recovery_area/ORCL/flashback [oracle@primary flashback]$ ls [oracle@primary flashback]$Bounce database and Flashback database to restore point: SQL> flashback database to restore point res_test2; Flashback complete.Reset the logs: SQL> alter database open resetlogs; Database altered.SQL> select count(*) from test1; COUNT(*) ———- 45 Thank you for giving your valuable time to read the above information.If you want to be updated with all our articles send us the Invitation or Follow us:Ramkumar’s LinkedIn: https://www.linkedin.com/in/ramkumardba/ LinkedIn Group: https://www.linkedin.com/in/ramkumar-m-0061a0204/ Facebook Page: https://www.facebook.com/Oracleagent-344577549964301 Ramkumar’s Twitter: https://twitter.com/ramkuma02877110 Ramkumar’s Telegram: https://t.me/oracleageant Ramkumar’s Facebook: https://www.facebook.com/ramkumarram8

DATABASE INCARNATION USING RMAN

ORACLE DATABASE INCARNATION USING RMAN

Description:-
In this blog, we are going to see the Oracle database incarnation using RMAN backup with the demo.

INCARNATION:-
The current online redo logs are archived, the log sequence number is reset to 1, a new database incarnation is created, and the online redo logs are given a new timestamp and SCN.

Database incarnation falls into the following category:-
Current, Parent, Ancestor, and Sibling:
i) Current Incarnation: The database incarnation in which the database is currently generating redo.
ii) Parent Incarnation: The database incarnation from which the current incarnation branched following an OPEN RESETLOGS operation.
iii) Ancestor Incarnation: The parent of the parent incarnation is an ancestor incarnation. Any parent of an ancestor incarnation is also an ancestor incarnation.
iv) Sibling Incarnation: Two incarnations that share a common ancestor are sibling incarnations if neither one is an ancestor of the other.

Overall steps:-

Backup full database using RMAN
After backup create a table in the database note the SCN number.
Delete and Drop table take SCN number.
Do log switching and check incarnation status.
Bounce the database started in the mount stage.
Connect RMAN and recover the database mention the sequence number
where the table record was deleted.
After the recovery is completed perform resetlogs to open the database.
Connect a database to check incarnation also check the table can be retrieved.
Shut the database and start the mount stage again.
Reset the database incarnation 2 to retrieve the table records mention the
scn where the table was created.
Check record can be retrieved.

Step 1: Backup full database:-

[oracle@test ~]$ . livedb.env
[oracle@test ~]$ rman target /
connected to target database: LIVEDB (DBID=3038906043)
RMAN> backup database;
Starting backup at 15-SEP-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=82 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/u01/app/oracle/oradata/LIVEDB/datafile/
o1_mf_system_jmz2qqys_.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/LIVEDB/datafile/
o1_mf_undotbs1_jmz2snrh_.dbf
input datafile file number=00003 name=/u01/app/oracle/oradata/LIVEDB/datafile/
o1_mf_sysaux_jmz2rvhs_.dbf
input datafile file number=00007 name=/u01/app/oracle/oradata/LIVEDB/datafile/
o1_mf_users_jmz2sovr_.dbf
channel ORA_DISK_1: starting piece 1 at 15-SEP-21
channel ORA_DISK_1: finished piece 1 at 15-SEP-21
piece handle=/u01/app/oracle/fast_recovery_area/LIVEDB/backupset/2021_09_15/
o1_mf_nnndf_TAG20210915T035943_jn28lqm2_.bkp tag=TAG20210915T035943 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:06
Finished backup at 15-SEP-21

Starting Control File and SPFILE Autobackup at 15-SEP-21
piece handle=/u01/app/oracle/fast_recovery_area/LIVEDB/autobackup/2021_09_15/
o1_mf_s_1083297650_jn28ntoh_.bkp comment=NONE
Finished Control File and SPFILE Autobackup at 15-SEP-21
RMAN> exit

Step 2: After backup create a table in the database note SCN number :-

[oracle@test ~]$ . livedb.env
[oracle@vtest ~]$ sqlplus / as sysdba
SQL> create table sample as select * from all_objects;
Table created.
SQL> select current_scn from v$database;
CURRENT_SCN
———–———–
2146558

Step 3: Delete and Drop table take SCN number:-
Delete the rows in the sample table:
SQL> delete from the sample;
71297 rows deleted.

Get the scn number also,
SQL> select current_scn from v$database;
CURRENT_SCN
———-———–
2146578

Drop the table structure:
SQL> drop table sample;
Table dropped.
SQL> commit;
Commit complete.
SQL> select current_scn from v$database;
CURRENT_SCN
——————–
2146601

Step 4: Do log switching and check incarnation status:-

SQL> alter system switch logfile;
System altered.
Check the incarnation using v$database_incarnation:
SQL> select incarnation#, resetlogs_change# from v$database_incarnation;
INCARNATION# RESETLOGS_CHANGE#
———— —————–
1 1
2 1920977

Step 5: Bounce the database start in mount stage:-

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL> startup mount
ORACLE instance started.
Total System Global Area 1694495520 bytes
Fixed Size                       8897312 bytes
Variable Size               402653184 bytes
Database Buffers        1275068416 bytes
Redo Buffers                  7876608 bytes
Database mounted.

Step 6: Connect RMAN and recover the database mention the sequence number where the table record was deleted:-

[oracle@test ~]$ rman target /
connected to target database: LIVEDB (DBID=3038906043, not open)
RMAN> run{
set until scn=2146578;
restore database;
recover database;
}
executing command: SET until clause
Starting restore at 15-SEP-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=45 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_system_jmz2qqys_.dbf
channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_sysaux_jmz2rvhs_.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_undotbs1_jmz2snrh_.dbf
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_users_jmz2sovr_.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/
LIVEDB/backupset/2021_09_15/o1_mf_nnndf_TAG20210915T035943_jn28lqm2_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/LIVEDB/
backupset/2021_09_15/o1_mf_nnndf_TAG20210915T035943_jn28lqm2_.bkp 
tag=TAG20210915T035943

channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:56
Finished restore at 15-SEP-21

Starting recover at 15-SEP-21
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:01

Finished recover at 15-SEP-21

Step 7: After the recovery is completed perform resetlogs to open the database:-

RMAN> alter database open resetlogs;
Statement processed
RMAN> exit

Step 8 : Connect database to check incarnation also check the table can be retrieved:-

[oracle@test ~]$ sqlplus / as sysdba
SQL> select incarnation#, resetlogs_change# from v$database_incarnation;
INCARNATION# RESETLOGS_CHANGE#
————          —————–
               1                        1
               2              1920977
               3              2146579
The table structure is retrieved but the record can be deleted from the scn number stage.
SQL> select * from the sample;
no rows selected

Step 9: Shut the database and start the mount stage again:-

SQL> shut immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

Step 10: Reset the database incarnation 2 to retrieve the table records mention the scn where table created:-

RMAN> reset database to incarnation 2;
using target database control file instead of recovery catalog
database reset to incarnation 2

RMAN> run{
set until scn=2146558;
restore database;
recover database;
}
executing command: SET until clause
Starting restore at 15-SEP-21
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=44 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_system_jmz2qqys_.dbf
channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_sysaux_jmz2rvhs_.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_undotbs1_jmz2snrh_.dbf
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/
LIVEDB/datafile/o1_mf_users_jmz2sovr_.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/
LIVEDB/backupset/2021_09_15/o1_mf_nnndf_TAG20210915T035943_jn28lqm2_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/
LIVEDB/backupset/2021_09_15/o1_mf_nnndf_TAG20210915T035943_jn28lqm2_.bkp 
tag=TAG20210915T035943
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:55
Finished restore at 15-SEP-21

Starting recover at 15-SEP-21
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 18 is already on disk as file 
/u01/app/oracle/fast_recovery_area/LIVEDB/archivelog/2021_09_15/
o1_mf_1_18_jn28r8l8_.arc
archived log file name=/u01/app/oracle/fast_recovery_area/LIVEDB/archivelog/
2021_09_15/o1_mf_1_18_jn28r8l8_.arc thread=1 sequence=18
media recovery complete, elapsed time: 00:00:02
Finished recover at 15-SEP-21

Perform reset logs method:

RMAN> alter database open resetlogs;
Statement processed
RMAN> exit

Step 11: Check the record can be retrieved from the table:-

[oracle@test ~]$ sqlplus / as sysdba

SQL> select count(1) from sample;

COUNT(1)
———-
71297
SQL>

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Restore Tablespace using RMAN

SQL> select name from v$tablespace;

NAME
------------------------------
SYSAUX
SYSTEM
UNDOTBS1
USERS
TEMP
TEST

6 rows selected.

SQL> alter tablespace users offline;

Tablespace altered.

SQL> exit

[oratest@oracle dbs]$ date
Wed Sep  8 22:15:37 IST 2021

Connect RMAN and backup tablespace

[oratest@oracle dbs]$  rman target/

Recovery Manager: Release 19.0.0.0.0 - Production on Wed Sep 8 22:16:02 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> restore tablespace users until time "to_date
('08-SEP-2021 22:15:37','DD-MON-YYYY:HH24:MI:SS')";

Starting restore at 08-SEP-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=66 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00007 to 
/u01/app/oracle/oradata/TEST/users01.dbf
channel ORA_DISK_1: reading from backup piece 
/u01/app/oracle/oradata/TEST/backup/1408j583_1_1
channel ORA_DISK_1: piece handle=
/u01/app/oracle/oradata/TEST/backup/1408j583_1_1 tag=TAG20210908T221323
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
Finished restore at 08-SEP-21

[oracle@oracle ~]$ rman target/

RMAN> restore tablespace users;
Starting restore at 08-SEP-21
using channel ORA_DISK_1
skipping datafile 5; already restored to file 
/u01/app/oracle/oradata/TEST/datafile/users.dbf
restore not done; all files read only, offline, excluded, or already restored
Finished restore at 08-SEP-21

RMAN> recover tablespace users;
Starting recover at 08-SEP-21
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 32 is already on disk as file 
/u01/app/oracle/fast_recovery_area/TEST/archivelog/2021_09_02/o1_mf_1_32_jlzwlxjb_.arc
media recovery complete, elapsed time: 00:00:12
Finished recover at 08-SEP-21
RMAN> exit
Recovery Manager complete.

[oratest@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 22:51:07 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 name from v$datafile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/TEST/system01.dbf
/u01/app/oracle/oradata/TEST/test03.dbf
/u01/app/oracle/oradata/TEST/sysaux01.dbf
/u01/app/oracle/oradata/TEST/undotbs01.dbf
/u01/app/oracle/oradata/TEST/test01.dbf
/u01/app/oracle/oradata/TEST/users01.dbf

6 rows selected.

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RESTORE SPFILE USING RMAN

Check Database Running Parameter

[oratest@oracle ~]$ export ORACLE_SID=test
[oratest@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 21:25:19 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>  show parameter pfile;

NAME      TYPE        VALUE
------- ------- ------------------------------
spfile  string   /u01/app/oracle/product/19.0.0
                  /dbhome_1/dbs/spfiletest.ora

Connect RMAN and Backup the Spfile:

[oratest@oracle ~]$ rman target /

Recovery Manager: Release 19.0.0.0.0 - Production on Wed Sep 8 21:26:38 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> backup spfile;

Starting backup at 08-SEP-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=66 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 08-SEP-21
channel ORA_DISK_1: finished piece 1 at 08-SEP-21
piece handle=/u01/app/oracle/oradata/TEST/backup/1208j2hb_1_1 tag=TAG20210908T212707 
comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 08-SEP-21

Starting Control File and SPFILE Autobackup at 08-SEP-21
piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-00 comment=NONE
Finished Control File and SPFILE Autobackup at 08-SEP-21

sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 21:28:32 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> shut immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

Move the Spfile to Backup File

[oracle@oracle ~]$ cd $ORACLE_HOME/dbs
[oracle@oracle dbs]$ ls
Spfiletest.ora  inittest.ora
[oracle@oracle dbs]$ mv spfiletest.ora spfiletest.ora_bkp
[oracle@oracle dbs]$ ls
initorcl.ora   Spfiletest.ora_bkp

[oratest@oracle dbs]$  rman target/

Recovery Manager: Release 19.0.0.0.0 - Production on Wed Sep 8 21:33:14 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database (not started)

RMAN> set dbid 2378581000
executing command: SET DBID


start the database in force option with nomount stage

RMAN> startup force nomount;

Oracle instance started

Total System Global Area    1543500144 bytes

Fixed Size                     8896880 bytes
Variable Size                905969664 bytes
Database Buffers             620756992 bytes
Redo Buffers                   7876608 bytes

Restore the spfile from Auto backup Location

RMAN> restore spfile  from autobackup;
Starting restore at 08-SEP-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/fast_recovery_area
database name (or database unique name) used for search: TEST
channel ORA_DISK_1: AUTOBACKUP /u01/app/oracle/fast_recovery_area/TEST/autobackup/2021_09_05/o1_mf_s_1082499783_jm9xhjjd_.bkp found in the recovery area
channel ORA_DISK_1: looking for AUTOBACKUP on day: 20210905
channel ORA_DISK_1: restoring spfile from AUTOBACKUP /u01/app/oracle/fast_recovery_area/TEST/autobackup/2021_09_05/o1_mf_s_1082499783_jm9xhjjd_.bkp
channel ORA_DISK_1: SPFILE restore from AUTOBACKUP complete
Finished restore at 08-SEP-21
Recovery Manager complete.

[oracle@oracle ~]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Sun Sep 5 22:32:18 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 name,open_mode from v$database;
NAME      OPEN_MODE
--------- --------------------
TEST      MOUNTED

Using alter command open the database

SQL> alter database open;
Database altered.

SQL>  select name,open_mode from v$database;
NAME      OPEN_MODE
--------- --------------------
TEST      READ WRITE

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Connect rman and Take level 0 backup

[oratest@oracle dbs]$  rman target/

Recovery Manager: Release 19.0.0.0.0 - Production on Thu Sep 9 00:42:53 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1608118455)

RMAN> backup incremental level 0 database plus archivelog;


Starting backup at 09-SEP-21
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=471 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=1 RECID=21 STAMP=1082265443
input archived log thread=1 sequence=2 RECID=22 STAMP=1082354497
input archived log thread=1 sequence=3 RECID=23 STAMP=1082412592
input archived log thread=1 sequence=4 RECID=24 STAMP=1082470208
input archived log thread=1 sequence=5 RECID=25 STAMP=1082554248
input archived log thread=1 sequence=6 RECID=26 STAMP=1082640636
input archived log thread=1 sequence=7 RECID=27 STAMP=1082677257
input archived log thread=1 sequence=9 RECID=29 STAMP=1082766943
input archived log thread=1 sequence=10 RECID=30 STAMP=1082766950
input archived log thread=1 sequence=11 RECID=31 STAMP=1082766986
input archived log thread=1 sequence=12 RECID=32 STAMP=1082766988
input archived log thread=1 sequence=13 RECID=33 STAMP=1082766991
input archived log thread=1 sequence=14 RECID=34 STAMP=1082767405
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1f08je1e_1_1 tag=TAG20210909T004325 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:56
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=13 RECID=9 STAMP=1081792908
input archived log thread=1 sequence=14 RECID=10 STAMP=1081863051
input archived log thread=1 sequence=15 RECID=11 STAMP=1081953019
input archived log thread=1 sequence=16 RECID=12 STAMP=1082066461
input archived log thread=1 sequence=17 RECID=19 STAMP=1082263361
input archived log thread=1 sequence=18 RECID=20 STAMP=1082263367
input archived log thread=1 sequence=19 RECID=18 STAMP=1082263356
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1g08je36_1_1 tag=TAG20210909T004325 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:47
Finished backup at 09-SEP-21

Starting backup at 09-SEP-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00003 name=/u01/app/oracle/oradata/ORCL/sysaux01.dbf
input datafile file number=00001 name=/u01/app/oracle/oradata/ORCL/system01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/ORCL/undotbs01.dbf
input datafile file number=00002 name=/u01/app/oracle/oradata/data02.dbf
input datafile file number=00005 name=/u01/app/oracle/oradata/data01.dbf
input datafile file number=00007 name=/u01/app/oracle/oradata/ORCL/users01.dbf
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1h08je4m_1_1 tag=TAG20210909T004510 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:06
Finished backup at 09-SEP-21

Starting backup at 09-SEP-21
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=15 RECID=35 STAMP=1082767577
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1i08je6p_1_1 tag=TAG20210909T004617 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 09-SEP-21

Starting Control File and SPFILE Autobackup at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/c-1608118455-20210909-00 comment=NONE
Finished Control File and SPFILE Autobackup at 09-SEP-21



Check backup summary and note the level 0 backup TAG

RMAN> list backup of database summary;


List of Backups
===============
Key     TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
--- -- -- - ----------- --------------- ------- ------- ---------- ---
1     B  F  A  DISK   11-AUG-21     1     1       NO  TAG20210811T222830
4     B  F  A  DISK   11-AUG-21     1     1       NO  TAG20210811T223126
7     B  F  A  DISK   11-AUG-21     1     1       NO  TAG20210811T223345
10    B  F  A DISK    11-AUG-21     1     1       NO  TAG20210811T224016
12    B  F  A DISK    11-AUG-21     1     1       NO  TAG20210811T224942

28    B  F  A DISK    12-AUG-21     1     1       NO  TAG20210812T223307
30    B  0  A DISK    12-AUG-21     1     1       NO  TAG20210812T224824
32    B  1  A DISK    12-AUG-21     1     1       NO  TAG20210812T225022
34    B  1  A DISK    12-AUG-21     1     1       NO  TAG20210812T225145
36    B  F  A DISK    25-AUG-21     1     1       NO  TAG20210825T220051
40    B  F  A DISK    03-SEP-21     1     1       NO  TAG20210903T044703
47    B  0  A DISK    09-SEP-21     1     1       NO  TAG20210909T004510


RMAN> exit

Once Level 0 is completed creating a user and table insert the record for the purpose of level 1 Backup

[oracle@oracle ~]$ export ORACLE_SID=orcl
[oracle@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 04:42:05 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> create user india identified by india;

User created.

SQL> grant connect, resource to india;

Grant succeeded.

SQL> alter user india default tablespace users quota unlimited on users;

User altered.

SQL> conn india/india
Connected.

create table test (no number(10),name varchar2(20));

SQL>  insert into test values(1,'one');

1 row created.

SQL> insert into test values(2,'Two');

1 row created.

SQL> insert into test values(3,'Three');

1 row created.

SQL> insert into test values(4,'Four');

1 row created.

SQL> commit;

Commit complete.

Connect RMAN And Take Level 1 Backup

 [oratest@oracle dbs]$ rman target /

Recovery Manager: Release 19.0.0.0.0 - Production on Thu Sep 9 01:00:32 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1608118455)

RMAN> backup incremental level 1 database plus archivelog;


Starting backup at 09-SEP-21
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=1 RECID=21 STAMP=1082265443
input archived log thread=1 sequence=2 RECID=22 STAMP=1082354497
input archived log thread=1 sequence=3 RECID=23 STAMP=1082412592
input archived log thread=1 sequence=4 RECID=24 STAMP=1082470208
input archived log thread=1 sequence=5 RECID=25 STAMP=1082554248
input archived log thread=1 sequence=6 RECID=26 STAMP=1082640636
input archived log thread=1 sequence=7 RECID=27 STAMP=1082677257
input archived log thread=1 sequence=9 RECID=29 STAMP=1082766943
input archived log thread=1 sequence=10 RECID=30 STAMP=1082766950
input archived log thread=1 sequence=11 RECID=31 STAMP=1082766986
input archived log thread=1 sequence=12 RECID=32 STAMP=1082766988
input archived log thread=1 sequence=13 RECID=33 STAMP=1082766991
input archived log thread=1 sequence=14 RECID=34 STAMP=1082767405
input archived log thread=1 sequence=15 RECID=35 STAMP=1082767577
input archived log thread=1 sequence=16 RECID=36 STAMP=1082768454
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1k08jf27_1_1 tag=TAG20210909T010055 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:55
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=13 RECID=9 STAMP=1081792908
input archived log thread=1 sequence=14 RECID=10 STAMP=1081863051
input archived log thread=1 sequence=15 RECID=11 STAMP=1081953019
input archived log thread=1 sequence=16 RECID=12 STAMP=1082066461
input archived log thread=1 sequence=17 RECID=19 STAMP=1082263361
input archived log thread=1 sequence=18 RECID=20 STAMP=1082263367
input archived log thread=1 sequence=19 RECID=18 STAMP=1082263356
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1l08jf3u_1_1 tag=TAG20210909T010055 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:47
Finished backup at 09-SEP-21

Starting backup at 09-SEP-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 1 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00003 name=/u01/app/oracle/oradata/ORCL/sysaux01.dbf
input datafile file number=00001 name=/u01/app/oracle/oradata/ORCL/system01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/ORCL/undotbs01.dbf
input datafile file number=00002 name=/u01/app/oracle/oradata/data02.dbf
input datafile file number=00005 name=/u01/app/oracle/oradata/data01.dbf
input datafile file number=00007 name=/u01/app/oracle/oradata/ORCL/users01.dbf
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1m08jf5e_1_1 tag=TAG20210909T010237 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:35
Finished backup at 09-SEP-21

Starting backup at 09-SEP-21
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=17 RECID=37 STAMP=1082768593
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1n08jf6h_1_1 tag=TAG20210909T010313 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 09-SEP-21

Starting Control File and SPFILE Autobackup at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/c-1608118455-20210909-01 comment=NONE
Finished Control File and SPFILE Autobackup at 09-SEP-21

RMAN> list backup of database summary;


List of Backups
===============
Key     TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
------- -- -- - ----------- --------------- ------- ------- ---------- ---
1    B  F  A DISK  11-AUG-21       1       1      NO   TAG20210811T222830
4    B  F  A DISK  11-AUG-21       1       1      NO   TAG20210811T223126
7    B  F  A DISK  11-AUG-21       1       1      NO   TAG20210811T223345
10   B  F  A DISK  11-AUG-21       1       1      NO   TAG20210811T224016
12   B  F  A DISK  11-AUG-21       1       1      NO   TAG20210811T224942
28   B  F  A DISK  12-AUG-21       1       1      NO   TAG20210812T223307
30   B  0  A DISK  12-AUG-21       1       1      NO   TAG20210812T224824
32   B  1  A DISK  12-AUG-21       1       1      NO   TAG20210812T225022
34   B  1  A DISK  12-AUG-21       1       1      NO   TAG20210812T225145
36   B  F  A DISK  25-AUG-21       1       1      NO   TAG20210825T220051
40   B  F  A DISK  03-SEP-21       1       1      NO   TAG20210903T044703
47   B  0  A DISK  09-SEP-21       1       1      NO   TAG20210909T004510
52   B  1  A DISK  09-SEP-21       1       1      NO   TAG20210909T010237

SQL>  select name from v$datafile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/ORCL/system01.dbf
/u01/app/oracle/oradata/data02.dbf
/u01/app/oracle/oradata/ORCL/sysaux01.dbf
/u01/app/oracle/oradata/ORCL/undotbs01.dbf
/u01/app/oracle/oradata/data01.dbf
/u01/app/oracle/oradata/ORCL/users01.dbf

Remove datafiles for testing purposes

[oratest@oracle ~]$  cd /u01/app/oracle/oradata/ORCL/
[oratest@oracle ORCL]$ ls -l
total 3099872
drwxrwxr-x. 2 oratest oratest       4096 Sep  9 01:03 backup
-rw-rw----. 1 oratest oratest   10600448 Sep  9 01:08 control01.ctl
-rw-rw----. 1 oratest oratest   10600448 Sep  9 01:08 control02.ctl
-rw-r-----. 1 oratest oratest  209715712 Sep  9 01:00 redo01.log
-rw-r-----. 1 oratest oratest  209715712 Sep  9 01:03 redo02.log
-rw-r-----. 1 oratest oratest  209715712 Sep  9 01:08 redo03.log
-rw-r-----. 1 oratest oratest 1069555712 Sep  9 01:03 sysaux01.dbf
-rw-r-----. 1 oratest oratest  975183872 Sep  9 01:03 system01.dbf
-rw-r-----. 1 oratest oratest  135274496 Sep  9 00:15 temp01.dbf
-rw-r-----. 1 oratest oratest  346038272 Sep  9 01:03 undotbs01.dbf
-rw-r-----. 1 oratest oratest    5251072 Sep  9 01:03 users01.dbf

[oratest@oracle ORCL]$ rm -rf *

Kill the DB instance, if running. You can do shut abort or kill pmon at OS level

[oratest@oracle ~]$  ps -ef  | grep pmon
ratest    3584      1  0 Sep08 ?        00:00:00 ora_pmon_test
oratest    5868      1  0 00:30 ?        00:00:00 ora_pmon_orcl
oratest    6951   4579  0 01:09 pts/0    00:00:00 grep --color=auto pmon

[oratest@oracle ~]$ kill -9 5868

[oratest@oracle ~]$ ps -ef |grep pmon
oratest    3584      1  0 Sep08 ?        00:00:00 ora_pmon_test
oratest    6994   4579  0 01:11 pts/0    00:00:00 grep --color=auto pmon

Start the DB instance and take it to the Mount stage.

[oracle@oracle ~]$ export ORACLE_SID=orcl
[oracle@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 04:47:02 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup nomount
ORACLE instance started.

Total System Global Area 1728050048 bytes
Fixed Size                  8897408 bytes
Variable Size             436207616 bytes
Database Buffers         1275068416 bytes
Redo Buffers                7876608 bytes
Database mounted.
SQL> exit
Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

Connect to RMAN and recover the Database

[oracle@oracle ~]$ export ORACLE_SID=ORCL
[oratest@oracle ~]$ rman target /

Recovery Manager: Release 19.0.0.0.0 - Production on Thu Sep 9 21:19:59 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1608118455, not open)

execute the run command mention the level 0 and level 1 TAG

RMAN> run
{
RESTORE DATABASE from tag TAG20210909T004510;
RECOVER DATABASE from tag TAG20210909T010237;
RECOVER DATABASE;
sql 'ALTER DATABASE OPEN';
}
Starting restore at 08-SEP-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=45 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/ORCL/system01.dbf
channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/ORCL/sysaux01.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/ORCL/undotbs01.dbf
channel ORA_DISK_1: restoring datafile 00007 to /u01/app/oracle/oradata/ORCL/users01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/ORCL/backupset/2021_09_08/o1_mf_nnnd0_TAG20210908T043841_jmhw7s4x_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/ORCL/backupset/2021_09_08/o1_mf_nnnd0_TAG20210908T043841_jmhw7s4x_.bkp tag=TAG20210908T043841
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:45
Finished restore at 08-SEP-21

Starting recover at 08-SEP-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
destination for restore of datafile 00001: /u01/app/oracle/oradata/ORCL/system01.dbf
destination for restore of datafile 00003: /u01/app/oracle/oradata/ORCL/sysaux01.dbf
destination for restore of datafile 00004: /u01/app/oracle/oradata/ORCL/undo01.dbf
destination for restore of datafile 00007: /u01/app/oracle/oradata/ORCL/users01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/fast_recovery_area/ORCL/backupset/2021_09_08/o1_mf_nnnd1_TAG20210908T044433_jmhwlskb_.bkp
channel ORA_DISK_1: piece handle=/u01/app/oracle/fast_recovery_area/ORCL/backupset/2021_09_08/o1_mf_nnnd1_TAG20210908T044433_jmhwlskb_.bkp tag=TAG20210908T044433
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:03

starting media recovery
media recovery complete, elapsed time: 00:00:00

Finished recover at 08-SEP-21

Starting recover at 08-SEP-21
using channel ORA_DISK_1

starting media recovery
media recovery complete, elapsed time: 00:00:00

Finished recover at 08-SEP-21

sql statement: ALTER DATABASE OPEN

RMAN> exit


Recovery Manager complete.

[oracle@oracle ~]$  cd /u01/app/oracle/oradata/ORCL
[oracle@oracle ]$ ls -l

total 3099872
-rw-rw----. 1 oratest oratest   10600448 Sep  9 01:08 control01.ctl
-rw-rw----. 1 oratest oratest   10600448 Sep  9 01:08 control02.ctl
-rw-r-----. 1 oratest oratest  209715712 Sep  9 01:00 redo01.log
-rw-r-----. 1 oratest oratest  209715712 Sep  9 01:03 redo02.log
-rw-r-----. 1 oratest oratest  209715712 Sep  9 01:08 redo03.log
-rw-r-----. 1 oratest oratest 1069555712 Sep  9 01:03 sysaux01.dbf
-rw-r-----. 1 oratest oratest  975183872 Sep  9 01:03 system01.dbf
-rw-r-----. 1 oratest oratest  135274496 Sep  9 00:15 temp01.dbf
-rw-r-----. 1 oratest oratest  346038272 Sep  9 01:03 undotbs01.dbf
-rw-r-----. 1 oratest oratest    5251072 Sep  9 01:03 users01.dbf

[oracle@oracle ~]$ export ORACLE_SID=ORCL
[oracle@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Sep 8 04:50:32 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

Connect the user and check table rows are recovered, it can be done in level 1 backup

SQL> conn india/india
Connected.
SQL> select * from test;

   NO     NAME
------   -----
     1    one
     2    Two
     3    Three
     4    Four

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LEVEL 0 INCREMENTAL BACKUP

[oratest@oracle dbs]$  rman target/

Recovery Manager: Release 19.0.0.0.0 - Production on Thu Sep 9 00:42:53 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1608118455)

RMAN> backup incremental level 0 database plus archivelog;


Starting backup at 09-SEP-21
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=471 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=1 RECID=21 STAMP=1082265443
input archived log thread=1 sequence=2 RECID=22 STAMP=1082354497
input archived log thread=1 sequence=3 RECID=23 STAMP=1082412592
input archived log thread=1 sequence=4 RECID=24 STAMP=1082470208
input archived log thread=1 sequence=5 RECID=25 STAMP=1082554248
input archived log thread=1 sequence=6 RECID=26 STAMP=1082640636
input archived log thread=1 sequence=7 RECID=27 STAMP=1082677257
input archived log thread=1 sequence=9 RECID=29 STAMP=1082766943
input archived log thread=1 sequence=10 RECID=30 STAMP=1082766950
input archived log thread=1 sequence=11 RECID=31 STAMP=1082766986
input archived log thread=1 sequence=12 RECID=32 STAMP=1082766988
input archived log thread=1 sequence=13 RECID=33 STAMP=1082766991
input archived log thread=1 sequence=14 RECID=34 STAMP=1082767405
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1f08je1e_1_1 tag=TAG20210909T004325 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:56
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=13 RECID=9 STAMP=1081792908
input archived log thread=1 sequence=14 RECID=10 STAMP=1081863051
input archived log thread=1 sequence=15 RECID=11 STAMP=1081953019
input archived log thread=1 sequence=16 RECID=12 STAMP=1082066461
input archived log thread=1 sequence=17 RECID=19 STAMP=1082263361
input archived log thread=1 sequence=18 RECID=20 STAMP=1082263367
input archived log thread=1 sequence=19 RECID=18 STAMP=1082263356
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1g08je36_1_1 tag=TAG20210909T004325 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:47
Finished backup at 09-SEP-21

Starting backup at 09-SEP-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting incremental level 0 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00003 name=/u01/app/oracle/oradata/ORCL/sysaux01.dbf
input datafile file number=00001 name=/u01/app/oracle/oradata/ORCL/system01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/ORCL/undotbs01.dbf
input datafile file number=00002 name=/u01/app/oracle/oradata/data02.dbf
input datafile file number=00005 name=/u01/app/oracle/oradata/data01.dbf
input datafile file number=00007 name=/u01/app/oracle/oradata/ORCL/users01.dbf
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1h08je4m_1_1 tag=TAG20210909T004510 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:06
Finished backup at 09-SEP-21

Starting backup at 09-SEP-21
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=15 RECID=35 STAMP=1082767577
channel ORA_DISK_1: starting piece 1 at 09-SEP-21
channel ORA_DISK_1: finished piece 1 at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/1i08je6p_1_1 tag=TAG20210909T004617 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 09-SEP-21

Starting Control File and SPFILE Autobackup at 09-SEP-21
piece handle=/u01/app/oracle/oradata/ORCL/backup/c-1608118455-20210909-00 comment=NONE
Finished Control File and SPFILE Autobackup at 09-SEP-21

RMAN> list backup of database summary;


List of Backups
===============
Key     TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag
--- -- -- - ----------- --------------- ------- ------- ---------- ---
1     B  F  A  DISK   11-AUG-21     1     1       NO  TAG20210811T222830
4     B  F  A  DISK   11-AUG-21     1     1       NO  TAG20210811T223126
7     B  F  A  DISK   11-AUG-21     1     1       NO  TAG20210811T223345
10    B  F  A DISK    11-AUG-21     1     1       NO  TAG20210811T224016
12    B  F  A DISK    11-AUG-21     1     1       NO  TAG20210811T224942

28    B  F  A DISK    12-AUG-21     1     1       NO  TAG20210812T223307
30    B  0  A DISK    12-AUG-21     1     1       NO  TAG20210812T224824
32    B  1  A DISK    12-AUG-21     1     1       NO  TAG20210812T225022
34    B  1  A DISK    12-AUG-21     1     1       NO  TAG20210812T225145
36    B  F  A DISK    25-AUG-21     1     1       NO  TAG20210825T220051
40    B  F  A DISK    03-SEP-21     1     1       NO  TAG20210903T044703
47    B  0  A DISK    09-SEP-21     1     1       NO  TAG20210909T004510

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CROSSCHECK BACKUPS Using RMAN

[oratest@oracle ~]$ rman target /

Recovery Manager: Release 19.0.0.0.0 - Production on Thu Sep 9 22:50:22 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> crosscheck backup;

using channel ORA_DISK_1
crosschecked backup piece: found to be 'EXPIRED'
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 'EXPIRED'
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210816-00 RECID=2 STAMP=1080772496
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/0306mo87_1_1 RECID=3 STAMP=1080779015
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210817-00 RECID=4 STAMP=1080779016
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/050797sg_1_1 RECID=5 STAMP=1081384849
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210824-00 RECID=6 STAMP=1081384850
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/070798lh_1_1 RECID=7 STAMP=1081385650
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-01 RECID=8 STAMP=1081385651
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/090798lu_1_1 RECID=9 STAMP=1081385662
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-02 RECID=10 STAMP=1081385719
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0b07bnao_1_1 RECID=11 STAMP=1081466201
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-03 RECID=12 STAMP=1081466202
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0d07bnbi_1_1 RECID=13 STAMP=1081466226
crosschecked backup piece: found to be 'EXPIRED'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-04 RECID=14 STAMP=1081466242
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0f07e69t_1_1 RECID=15 STAMP=1081547069
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210825-00 RECID=16 STAMP=1081547125
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0h07e6de_1_1 RECID=17 STAMP=1081547183
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210825-01 RECID=18 STAMP=1081547198
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210830-00 RECID=19 STAMP=1081978741
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0m07rmdf_1_1 RECID=20 STAMP=1081989551
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210831-00 RECID=21 STAMP=1081989628
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210831-01 RECID=22 STAMP=1081997052
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210831-02 RECID=23 STAMP=1081997951
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0q07uikl_1_1 RECID=24 STAMP=1082083989
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210901-00 RECID=25 STAMP=1082083991
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0s07ujal_1_1 RECID=26 STAMP=1082084693
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210901-01 RECID=27 STAMP=1082084759
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0u08ggfl_1_1 RECID=28 STAMP=1082671605
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210907-00 RECID=29 STAMP=1082671607
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/1008gis0_1_1 RECID=30 STAMP=1082674049
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210907-01 RECID=31 STAMP=1082674104
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/1208j2hb_1_1 RECID=32 STAMP=1082755628
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-00 RECID=33 STAMP=1082755629
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/1408j583_1_1 RECID=34 STAMP=1082758403
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-01 RECID=35 STAMP=1082758405
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-02 RECID=36 STAMP=1082759210
Crosschecked 36 objects

Delete Expired Backups

RMAN> delete expired backup;

using channel ORA_DISK_1

List of Backup Pieces
BP Key  BS Key  Pc# Cp# Status      Device Type Piece Name
------- ------- --- --- ----------- ----------- ----------
1       1       1   1   EXPIRED     DISK        /u01/app/oracle/product/19.0.0/dbhome_1/dbs/0106mhr1_1_1
2       2       1   1   EXPIRED     DISK        /u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210816-00
3       3       1   1   EXPIRED     DISK        /u01/app/oracle/product/19.0.0/dbhome_1/dbs/0306mo87_1_1
4       4       1   1   EXPIRED     DISK        /u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210817-00
5       5       1   1   EXPIRED     DISK        /u01/app/oracle/product/19.0.0/dbhome_1/dbs/050797sg_1_1
6       6       1   1   EXPIRED     DISK        /u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210824-00
7       7       1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/070798lh_1_1
8       8       1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-01
9       9       1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/090798lu_1_1
10      10      1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-02
11      11      1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/0b07bnao_1_1
12      12      1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-03
13      13      1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/0d07bnbi_1_1
14      14      1   1   EXPIRED     DISK        /u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-04

Do you really want to delete the above objects (enter YES or NO)? yes


deleted backup piece
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/0106mhr1_1_1 RECID=1 STAMP=1080772449
deleted backup piece
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210816-00 RECID=2 STAMP=1080772496
deleted backup piece
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/0306mo87_1_1 RECID=3 STAMP=1080779015
deleted backup piece
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210817-00 RECID=4 STAMP=1080779016
deleted backup piece
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/050797sg_1_1 RECID=5 STAMP=1081384849
deleted backup piece
backup piece handle=/u01/app/oracle/product/19.0.0/dbhome_1/dbs/c-2378581000-20210824-00 RECID=6 STAMP=1081384850
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/070798lh_1_1 RECID=7 STAMP=1081385650
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-01 RECID=8 STAMP=1081385651
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/090798lu_1_1 RECID=9 STAMP=1081385662
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-02 RECID=10 STAMP=1081385719
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0b07bnao_1_1 RECID=11 STAMP=1081466201
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-03 RECID=12 STAMP=1081466202
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0d07bnbi_1_1 RECID=13 STAMP=1081466226
deleted backup piece
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210824-04 RECID=14 STAMP=1081466242
Deleted 14 EXPIRED objects

RMAN> crosscheck backup;

using channel ORA_DISK_1
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0f07e69t_1_1 RECID=15 STAMP=1081547069
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210825-00 RECID=16 STAMP=1081547125
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0h07e6de_1_1 RECID=17 STAMP=1081547183
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210825-01 RECID=18 STAMP=1081547198
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210830-00 RECID=19 STAMP=1081978741
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0m07rmdf_1_1 RECID=20 STAMP=1081989551
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210831-00 RECID=21 STAMP=1081989628
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210831-01 RECID=22 STAMP=1081997052
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210831-02 RECID=23 STAMP=1081997951
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0q07uikl_1_1 RECID=24 STAMP=1082083989
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210901-00 RECID=25 STAMP=1082083991
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0s07ujal_1_1 RECID=26 STAMP=1082084693
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210901-01 RECID=27 STAMP=1082084759
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/0u08ggfl_1_1 RECID=28 STAMP=1082671605
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210907-00 RECID=29 STAMP=1082671607
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/1008gis0_1_1 RECID=30 STAMP=1082674049
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210907-01 RECID=31 STAMP=1082674104
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/1208j2hb_1_1 RECID=32 STAMP=1082755628
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-00 RECID=33 STAMP=1082755629
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/1408j583_1_1 RECID=34 STAMP=1082758403
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-01 RECID=35 STAMP=1082758405
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u01/app/oracle/oradata/TEST/backup/c-2378581000-20210908-02 RECID=36 STAMP=1082759210
Crosschecked 22 objects

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RESTORE CONTROL FILE USING RMAN

Check the RMAN configuration and controlfile Auto backup Feature

[oratest@oracle ~]$ export ORACLE_SID=orcl
[oratest@oracle ~]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Fri Sep 3 04:14:07 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1608118455)

RMAN> show all;

RMAN configuration parameters for database with db_unique_name ORCL
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 '/u01/app/oracle/oradata/ORCL/backup/%F';
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 CHANNEL DEVICE TYPE DISK FORMAT
'/u01/app/oracle/oradata/ORCL/backup/%U' MAXPIECESIZE 8 G;
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/dbhome_1/dbs/snapcf_orcl.f'; # default

Simulate a failure when the Database is Running

[oratest@oracle ~]$ export ORACLE_SID=orcl

[oratest@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Fri Sep 3 04:21:36 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 open_mode,name from v$database;
OPEN_MODE     NAME
---------   ---------
READ WRITE    ORCL

SQL> select name from v$controlfile;
NAME
-------------------------------------------------------
/u01/app/oracle/oradata/ORCL/control01.ctl
/u01/app/oracle/oradata/ORCL/control02.ctl

DELECT CONTROLFILE MANUALY

[oratest@oracle ~]$ cd /u01/app/oracle/oradata/ORCL/

[oratest@oracle ORCL]$ ls

backup control01.ctl control02.ctl redo01.log redo02.log redo03.log
sysaux01.dbf system01.dbf temp01.dbf undotbs01.dbf users01.dbf

[oratest@oracle ORCL]$ rm -fr control01.ctl

[oratest@oracle ORCL]$ rm -fr control02.ctl

[oratest@oracle ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Fri Sep 3 04:27:01 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> alter tablespace data add datafile
'/u01/app/oracle/oradata/ORCL/test03.dbf' size 100m;
alter tablespace data add datafile '/u01/app/oracle/oradata/ORCL/test03.dbf'
size 100m
*
ERROR at line 1:
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/u01/app/oracle/oradata/ORCL/control01.ctl'
ORA-27041: unable to open file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3

SQL> select status from v$instance;
STATUS
------------
OPEN

SQL> shut immediate
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/u01/app/oracle/oradata/ORCL/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.

Keep the Database in NOMOUNT Stage and Restore the control file

SQL> startup 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

Since we are not using an RMAN catalog we need to set the DBID

[oratest@oracle ~]$ rman target /
Recovery Manager: Release 19.0.0.0.0 - Production on Fri Sep 3 04:32:06 2021
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (not mounted)

RMAN> set dbid=1608118455;
executing command: SET DBID

RMAN> restore controlfile from
"/u01/app/oracle/oradata/ORCL/backup/170840mm_1_1";
Starting restore at 03-SEP-21
using channel ORA_DISK_1
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/u01/app/oracle/oradata/ORCL/control01.ctl
output file name=/u01/app/oracle/oradata/ORCL/control02.ctl
Finished restore at 03-SEP-21

Mount and Recover the database

RMAN> alter database mount;
released channel: ORA_DISK_1
Statement processed
RMAN> restore database;
Starting restore at 03-SEP-21
using channel ORA_DISK_1
RMAN-00571:
===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS
===============
RMAN-00571:
===========================================================

starting media Recovery

archived log for thread 1 with sequence 19 is already on disk as file
/u01/app/oracle/oradata/ORCL/redo01.log
archived log file name=/u01/app/oracle/oradata/ORCL/redo01.log thread=1
sequence=19
media recovery complete, elapsed time: 00:00:00
Finished recover at 03-SEP-21
Statement processed
Use RESETLOGS after incomplete recovery (when the entire redo stream
wasn’t applied). RESETLOGS will initialize the logs, reset your log sequence
number, and start a new “incarnation” of the database.

RMAN> alter database open resetlogs;
Statement processed

SQL> select open_mode,name from v$database;
OPEN_MODE          NAME
---------------  ---------
READ WRITE         ORCL

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ORA-27125: unable to create shared memory segment Linux-x86_64 Error: 28: No space left on device

When trying to start up an Oracle database, the below errors occur:

ORA-27125: unable to create shared memory segment
Linux-x86_64 Error: 28: No space left on device
Additional information: 3773
Additional information: 3221225472

CAUSE

Kernel parameter kernel.shmall is not set properly.

RESOLUTION

Make sure kernel.shmall is given the appropriate value.

1) Calculate the value of shmall.

getconf PAGE_SIZE

4096
Shmall=total size of the SGAs /PAGE_SIZE.
If the total SGA size is 480GB, then it would be 1024 * 1024 * 1024 * 32 / 4096 = 8388608

2) Edit /etc/sysctl.conf
kernel.shmall = 8388608

3) Apply the change
# sysctl -p

4) Check shmall value after change.
# sysctl -A | grep shmall

5) Start up database successfully.

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Tag Archives: Linux-x86_64 Error

ORACLE DATABASE RESTORE POINT

ORACLE DATABASE INCARNATION USING RMAN

Check Database Running Parameter

Move the Spfile to Backup File

Restore the spfile from Auto backup Location

Connect rman and Take level 0 backup

Once Level 0 is completed creating a user and table insert the record for the purpose of level 1 Backup

Remove datafiles for testing purposes

Kill the DB instance, if running. You can do shut abort or kill pmon at OS level

Start the DB instance and take it to the Mount stage.

Connect to RMAN and recover the Database

execute the run command mention the level 0 and level 1 TAG

Connect the user and check table rows are recovered, it can be done in level 1 backup

Delete Expired Backups

Check the RMAN configuration and controlfile Auto backup Feature

DELECT CONTROLFILE MANUALY

Keep the Database in NOMOUNT Stage and Restore the control file

Since we are not using an RMAN catalog we need to set the DBID

starting media Recovery

CAUSE

RESOLUTION

getconf PAGE_SIZE