Sometime DBA needs to take RMAN L0
backup due to many reasons like rman refresh,rman restore etc. and sometimes
application team also ask DBA to take L0 backup and during that time DBA needs
to execute the L0 backup command but the biggest challenge comes for the DBA
when the database size is huge which takes many hours to complete and they can’t
run that L0 backup in foreground so to overcome this challenge we can use rman
automation backup script which takes database L0 backup in background.
Purpose of the Script ->
Automate RMAN L0 Backup
Format to run the script Ã
<Script_name.sh> <DBNAME>
Run this automation in background
-> nohup ./L0_bkp_script.sh USPRIM &
NOTE A: Change database
service name as per your environment highlighted in red.
NOTE B: You don’t
need to set database environment and if you’ve already set then it’s also fine,
just pass the correct database name along with the script name as defined above
in “Format to run the script” section and the automation automatically
set the environment for the database.
NOTE C: If you’re using this automation against RAC database then comment the line highlighted in green and uncomment the line highlighted in brown & bold.
NOTE D: If the
database size is huge in several TB, then also use section size clause in L0
backup command.
NOTE E: allocate
channel as per the available CPU in the database server.
BODY OF
SCRIPT
#!/bin/bash
#set -xv
#set -n
mkdir -p /tmp/DB_L0_BKP
BKP_LOG=/tmp/DB_L0_BKP
RMAN_LOG=$BKP_LOG/L0_BKP.log
DBNAME=$1
DBNAME=`ps -ef
|grep -i ora_pmon_$1 | grep -v grep | awk '{print $8}' | cut -d "_"
-f3`
#DBNAME=`ps -ef |grep -i ora_pmon_$1 | grep -v grep | awk '{print
$8}' | cut -d "_" -f3 | sed 's/.$//'`
DB_STATUS=`ps -ef|grep -i
ora_pmon_$1 | grep -v grep | wc -l`
if [ ${DB_STATUS} -eq 1 ]
then
export ORACLE_SID=`ps -ef | grep
-i ora_pmon_$1 | grep -v grep | cut -d "_" -f 3`
proid=`ps -ef | grep -i
ora_pmon_$1 | grep -v grep | awk '{print $2}'`
var=`ls -l /proc/$proid/cwd | cut
-d ">" -f 2 | sed 's/^ //'`
export ORACLE_HOME=`echo
"${var%/*}"`
export
PATH=$ORACLE_HOME/bin:$PATH
export ORACLE_BASE=`ls -l
/proc/$proid/cwd | cut -d ">" -f 2 | sed 's/^ //' | awk -F
"/product" '{print $1}'`
$ORACLE_HOME/bin/sqlplus -s
"/ as sysdba" << EOF >>$BKP_LOG/db_info.log
set lines 300 colsep '|'
select name from v\$database;
show parameter db_unique_name;
exit;
EOF
else
echo "Database $1 Is Not
Running"
exit 1;
fi
rman target sys/sys123@US_PRIM log=$RMAN_LOG <<EOG
run
{
allocate channel c1 device type
disk connect 'sys/sys123@US_PRIM as sysdba';
allocate channel c2 device type
disk connect 'sys/sys123@US_PRIM as sysdba';
backup as compressed backupset
format '/u01/DB_BKP/$1_%t_%s_%U' incremental level 0 database;
}
exit;
EOG
############ Script Ends Here
SAMPLE
OUTPUT
RMAN> 2> 3> 4> 5>
6>
using target database control
file instead of recovery catalog
allocated channel: c1
channel c1: SID=36 device
type=DISK
allocated channel: c2
channel c2: SID=271 device
type=DISK
Starting backup at 28-JAN-24
channel c1: starting compressed
incremental level 0 datafile backup set
channel c1: specifying
datafile(s) in backup set
input datafile file number=00001
name=/u01/app/oracle/oradata/US_PRIM/datafile/o1_mf_system_lrj2vsk5_.dbf
input datafile file number=00007
name=/u01/app/oracle/oradata/US_PRIM/datafile/o1_mf_users_lrj30xtc_.dbf
-
Starting Control File and SPFILE
Autobackup at 28-JAN-24
piece
handle=/u01/app/oracle/fast_recovery_area/US_PRIM/autobackup/2024_01_28/o1_mf_s_1159298726_lvdg4gb3_.bkp
comment=NONE
Finished Control File and SPFILE
Autobackup at 28-JAN-24
released channel: c1
released channel: c2
