Incremental Database recovery -RMAN

 

SOURCE (SourceDB - HOST - DBHOST01)

TARGET (TargetDB - HOST - DBHOST02)



STEP 1

ON SOURCE

Take a full backup of source database

Rman target /


run
{
CONFIGURE CHANNEL DEVICE TYPE 'SBT_TAPE' PARMS 'BLKSIZE=1048576,SBT_LIBRARY=/home/oracle/opt/dpsapps/rmanagent/lib/libddobk.so,ENV=(STORAGE_UNIT=t1-OracleDB01,BACKUP_HOST=DBHOST01,RMAN_AGENT_HOME=/home/oracle/opt/dpsapps/rmanagent/)' FORMAT './%d/daily/%T_%d_Full_Daily_%s_%U';
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'SBT_TAPE' TO './%d/daily/%T_%d_Control_%F';
BACKUP KEEP UNTIL TIME 'SYSDATE+8' RESTORE POINT 'MANUAL_FULL_03142023' FORCE NOEXCLUDE AS BACKUPSET TAG 'MANUAL_FULL_03142023' DATABASE;
BACKUP AS BACKUPSET TAG '%TAG' ARCHIVELOG ALL NOT BACKED UP 2 TIMES FORMAT './%d/daily/%T_%d_arch_%s_%U';
CROSSCHECK BACKUP;
DELETE NOPROMPT EXPIRED BACKUPSET;
DELETE NOPROMPT OBSOLETE DEVICE TYPE 'SBT_TAPE';
DELETE NOPROMPT BACKUP OF ARCHIVELOG UNTIL TIME 'SYSDATE-8';
}

Take backup of pfile & copied to /u03/app/oracle/utils/temp/*.ora on target server
create pfile='/tmp/initSource.ora' from spfile;


STEP 2

On Target

Create the target database using BUI before proceeding with below steps.

Remove below files and directories

 rm -rf /u01/app/odaorahome/oracle/product/19.0.0.0/dbhome_38/dbs/*
 rm -rf /u02/app/oracle/oradata/SourceDB/dbs/spfileSourceDB.ora
 rm -rf /u04/app/oracle/redo/SourceDB/SourceDB/controlfile/cntrlSourceDB.ctl
 rm -rf /u02/app/oracle/oradata/SourceDB/SourceDB/datafile/*
 rm -rf /u03/app/oracle/fast_recovery_area/SourceDB/*
 rm -rf/u04/app/oracle/redo/SourceDB/SourceDB/onlinelog/*



ls -lrt /u02/app/oracle/oradata/SourceDB/dbs/spfileSourceDB.ora
ls -lrt /u04/app/oracle/redo/SourceDB/SourceDB/controlfile/cntrlSourceDB.ctl
ls -lrt /u01/app/odaorahome/oracle/product/19.0.0.0/dbhome_4/dbs/
ls -lrt /u02/app/oracle/oradata/SourceDB/SourceDB/datafile/
ls -lrt /u03/app/oracle/fast_recovery_area/SourceDB/
ls -lrt /u04/app/oracle/redo/SourceDB/SourceDB/onlinelog/

 mkdir -p /u03/app/oracle/fast_recovery_area/SourceDB/onlinelog/
 mkdir -p /u03/app/oracle/fast_recovery_area/SourceDB/controlfile/



Identify the latest controlfile autobackup and use that controlfile autobackup to restore the latest full backup.






STEP 3

ON TARGET


shutdown abort the  TargetDB database

. oraenv 

TargetDB

Sqlplus / as sysdba

Shutdown abort


STEP 4

ON TARGET

. oraenv
TargetDB



Make sure the dbid and parameter file is correct.


rman target /



run
{
set dbid=***;
startup nomount pfile='/u03/app/oracle/utils/temp/initTargetDB.ora';
allocate channel sbt type 'SBT_TAPE' parms 'BLKSIZE=1048576,SBT_LIBRARY=/home/oracle/opt/dpsapps/rmanagent/lib/libddobk.so,ENV=(STORAGE_UNIT=t1-OracleDB01,BACKUP_HOST=DBHOST01,RMAN_AGENT_HOME=/home/oracle/opt/dpsapps/rmanagent/)';
SET CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'SBT_TAPE' TO './%d/daily/%T_%d_Control_%F';
restore spfile from autobackup;
shutdown immediate;
startup nomount;
alter system set listener_networks='' scope=both;
restore controlfile from autobackup;
alter database mount;
restore database;
recover database;
}

Ignore errors 

archived log thread=1 sequence=15991
released channel: sbt
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 06/22/2023 13:47:22
RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 15991 and starting SCN of 22372526


STEP 5

ON SOURCE

Take manual archivelog backup

rman target /

run
{
CONFIGURE CHANNEL DEVICE TYPE 'SBT_TAPE' PARMS 'BLKSIZE=1048576,SBT_LIBRARY=/home/oracle/opt/dpsapps/rmanagent/lib/libddobk.so,ENV=(STORAGE_UNIT=t1-OracleDB01,BACKUP_HOST=DBHOST02,RMAN_AGENT_HOME=/home/oracle/opt/dpsapps/rmanagent/)' FORMAT './%d/daily/%T_%d_Full_Daily_%s_%U';
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'SBT_TAPE' TO './%d/daily/%T_%d_Control_%F';
BACKUP DEVICE TYPE 'SBT_TAPE' TAG '%TAG' ARCHIVELOG ALL NOT BACKED UP 2 TIMES FORMAT './%d/daily/%T_%d_arch_%s_%U';
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 2 TIMES TO 'SBT_TAPE';
CROSSCHECK ARCHIVELOG ALL;
DELETE NOPROMPT OBSOLETE;
DELETE NOPROMPT ARCHIVELOG UNTIL TIME 'SYSDATE-3' BACKED UP 2 TIMES TO DEVICE TYPE 'SBT_TAPE';
DELETE NOPROMPT EXPIRED ARCHIVELOG ALL;
}

STEP 6

On target 

indentify the archivelog backup piece and catalog and perform the 2nd recovery

run
{
allocate channel sbt type 'SBT_TAPE' parms 'BLKSIZE=1048576,SBT_LIBRARY=/home/oracle/opt/dpsapps/rmanagent/lib/libddobk.so,ENV=(STORAGE_UNIT=t1-OracleDB01,BACKUP_HOST=ivndatadom01.ad.skynet,RMAN_AGENT_HOME=/home/oracle/opt/dpsapps/rmanagent/)';
CATALOG BACKUPPIECE './SourceDB/daily/20230804_SourceDB_arch_22474_ua22vc9b_22474_1_1';
recover database;
}


STEP 7

DURING CUTOVER.

ON source database

For source database, Stop all rman backup jobs and put the database in blackout mode .

Make sure no application sessions are connected to the source database.

select username, status, count(*) from v$session where username is not null and username not in ('SYS','SYSTEM','DBSNMP','SYSRAC') GROUP BY USERNAME, STATUS;


create user test identified by test default tablespace users;

grant create session,create  table,select_catalog_role  to test;

alter user test quota unlimited on users;


connect test/test

create table test as select * from dba_users;
insert into test select * from dba_users;
commit;

conn / as sysdba

alter system switch logfile;
alter system switch logfile;
alter system switch logfile;
alter system switch logfile;
alter system switch logfile;
alter system checkpoint;

shutdown immediate;

startup mount;


take final archivelog backup when database is in mount state.

rman target /

run
{
CONFIGURE CHANNEL DEVICE TYPE 'SBT_TAPE' PARMS 'BLKSIZE=1048576,SBT_LIBRARY=/home/oracle/opt/dpsapps/rmanagent/lib/libddobk.so,ENV=(STORAGE_UNIT=t1-OracleDB01,BACKUP_HOST=DBHOST02,RMAN_AGENT_HOME=/home/oracle/opt/dpsapps/rmanagent/)' FORMAT './%d/daily/%T_%d_Full_Daily_%s_%U';
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'SBT_TAPE' TO './%d/daily/%T_%d_Control_%F';
BACKUP DEVICE TYPE 'SBT_TAPE' TAG '%TAG' ARCHIVELOG ALL NOT BACKED UP 2 TIMES FORMAT './%d/daily/%T_%d_arch_%s_%U';
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 2 TIMES TO 'SBT_TAPE';
CROSSCHECK ARCHIVELOG ALL;
DELETE NOPROMPT OBSOLETE;
DELETE NOPROMPT ARCHIVELOG UNTIL TIME 'SYSDATE-3' BACKED UP 2 TIMES TO DEVICE TYPE 'SBT_TAPE';
DELETE NOPROMPT EXPIRED ARCHIVELOG ALL;
}



STEP 8

Indentify the remaining backup pieces to catalog and perform final recover.


rman target /

run
{
allocate channel sbt type 'SBT_TAPE' parms 'BLKSIZE=1048576,SBT_LIBRARY=/home/oracle/opt/dpsapps/rmanagent/lib/libddobk.so,ENV=(STORAGE_UNIT=t1-OracleDB01,BACKUP_HOST=wobdatadom01.ad.skynet,RMAN_AGENT_HOME=/home/oracle/opt/dpsapps/rmanagent/)';
CATALOG BACKUPPIECE './TargetDB/daily/20230314_TargetDB_arch_7846_l61n18qt_7846_1_1';
recover database;
}


STEP 9

Open the database with resetlogs


RMAN> alter database open resetlogs;


++++++++++++++incase if we receive below error+++++++++++++++

using target database control file instead of recovery catalog
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of sql statement command at 03/09/2023 07:12:11
ORA-00392: log 2 of thread 1 is being cleared, operation not allowed
ORA-00312: online log 2 thread 1: '/u04/app/oracle/redo/IVLABDEV/IVLABDEV/onlinelog/log_g2m1.log'
ORA-00312: online log 2 thread 1: '/u03/app/oracle/fast_recovery_area/IVLABDEV/onlinelog/log_g2m2.log'



Solution;

SQL> select group#,thread#,status from v$log;

    GROUP#    THREAD# STATUS
---------- ---------- ----------
         1          1 CLEARING
         4          1 CLEARING
         3          1 CLEARING
         2          1 CLEARING_C
                      URRENT


SQL> alter database clear unarchived logfile group 2;

Database altered.


RMAN>alter database open resetlogs;

Statement processed



SQL> select group#,thread#,status from v$log;

    GROUP#    THREAD# STATUS
---------- ---------- ----------------
         1          1 CURRENT
         2          1 UNUSED
         3          1 UNUSED
         4          1 UNUSED
 
 
COL DF# FORMAT 999
COL DF_NAME FORMAT A35
COL TBSP_NAME FORMAT A7
COL STATUS FORMAT A7
COL ERROR FORMAT A10
COL CHANGE# FORMAT 99999999
SELECT r.FILE# AS df#, d.NAME AS df_name, t.NAME AS tbsp_name, 
       d.STATUS, r.ERROR, r.CHANGE#, r.TIME
FROM V$RECOVER_FILE r, V$DATAFILE d, V$TABLESPACE t
WHERE t.TS# = d.TS#
AND d.FILE# = r.FILE#
;


SQL> select group#,thread#,status from v$log;

    GROUP#    THREAD# STATUS
---------- ---------- ----------------
         1          1 CURRENT
         2          1 UNUSED
         3          1 UNUSED
         4          1 UNUSED

SQL> set lines 1000;
col MEMBER for a80;
select * from v$logfile;
SQL> SQL>

    GROUP# STATUS  TYPE    MEMBER                                                                           IS_     CON_ID
---------- ------- ------- -------------------------------------------------------------------------------- --- ----------
         3         ONLINE  /u04/app/oracle/redo/TargetDB/TargetDB/onlinelog/log_g3m1.log                    NO           0
         2         ONLINE  /u04/app/oracle/redo/TargetDB/TargetDB/onlinelog/log_g2m1.log                    NO           0
         1         ONLINE  /u04/app/oracle/redo/TargetDB/TargetDB/onlinelog/log_g1m1.log                    NO           0
         2         ONLINE  /u03/app/oracle/fast_recovery_area/TargetDB/onlinelog/log_g2m2.log               NO           0
         3         ONLINE  /u03/app/oracle/fast_recovery_area/TargetDB/onlinelog/log_g3m2.log               NO           0
         1         ONLINE  /u03/app/oracle/fast_recovery_area/TargetDB/onlinelog/log_g1m2.log               NO           0
         4         ONLINE  /u04/app/oracle/redo/TargetDB/TargetDB/onlinelog/log_g4m1.log                    NO           0
         4         ONLINE  /u03/app/oracle/fast_recovery_area/TargetDB/onlinelog/log_g4m2.log               NO           0

8 rows selected.



SQL> archive log list
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     1
Next log sequence to archive   2
Current log sequence           2


SQL> alter system switch logfile;

SQL> alter system switch logfile;

SQL> alter system switch logfile;

SQL> alter system checkpoint;

System altered.

SQL>

SQL> select name from v$tempfile;

NAME
--------------------------------------------------------------------------------
/u02/app/oracle/oradata/TargetDB/TargetDB/datafile/o1_mf_temp_l0gjoopm_.tmp

SQL> !ls -lrt /u02/app/oracle/oradata/TargetDB/TargetDB/datafile/o1_mf_temp_l0gjoopm_.tmp
-rw-r----- 1 oracle asmadmin 29368320 Mar  7 08:57 /u02/app/oracle/oradata/TargetDB/TargetDB/datafile/o1_mf_temp_l0gjoopm_.tmp

SQL> show user
USER is "TEST"
SQL> select count(*) from test;

  COUNT(*)
----------
        92

SQL>

SQL>select file#, status, fuzzy, error, checkpoint_change#,
to_char(checkpoint_time,'dd-mon-rrrr hh24:mi:ss') as checkpoint_time
from v$datafile_header;



[oracle@wobodaprd01n0 ~]$ srvctl stop database -d WBPLL019
[oracle@wobodaprd01n0 ~]$ srvctl start database -d WBPLL019

SQL> select dbid, name from v$database;

      DBID NAME
---------- ---------
2883099068 TargetDB

RMAN> list incarnation;

using target database control file instead of recovery catalog

List of Database Incarnations
DB Key  Inc Key DB Name  DB ID            STATUS  Reset SCN  Reset Time
------- ------- -------- ---------------- --- ---------- ----------
1       1       TargetDB 2883099068       PARENT  1          10-NOV-21
2       2       TargetDB 2883099068       PARENT  2499432    04-APR-22
3       3       TargetDB 2883099068       CURRENT 42147169733 14-MAR-23



STEP 10 (POST MIGRATION STEPS)





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