UNIX Shell Script Cold Database Backup

Updated : 18-Apr-2002
Version : 2.0

Description

Retreives a list of all database files from the database whilst still running and generates a Shell script to do a unix copy to a directory and a shell script to run the dbverify utility. The datafiles can be copied to tape drive from the disk copy. Implementing the backup this way via a disk to disk copy reduces the database down time.

Parameters

$1 (MANDATORY) - ORACLE_SID of the database to backup
$2 (MANDATORY) - The directory to backup the database
$3 (MANDATORY) - The database connect string to export from.

Shell Source

#!/bin/ksh

function Usage 
{
   echo
   echo "Usage : cold_backup.ksh   "
   echo
   echo "where ORACLE_SID (Mandatory) - SID of database to start"
   echo "      BACKUP DIRECTORY - The location of the directory to backup the files to."
   echo " e.g.  $ cold_bu.ksh PROD /app/oracle/u1/backup" 
   echo
}

#########################################################
# START OF MAIN SCRIPT
#########################################################    

DATABASE=$1
ORA_BACKUP=$2; export ORA_BACKUP

USERPASS="/ as sysdba"

# Check that we have a database
if [ -z "${DATABASE}" ]
then
   echo
   echo "No Database Specified !"
   Usage
   exit 1
fi

# Check we have an Oracle username and password
if [ -z "${USERPASS}" ]
then
   echo
   echo "No Database connect string specified !"
   Usage
   exit 1
fi

# Check the backup directory exists
if [ ! -d "${ORA_BACKUP}" ]
then
  echo
  echo "Backup Directory $ORA_BACKUP does not exist !"
  echo
  exit 1
fi

ORACLE_SID=$DATABASE
export ORACLE_SID
export ORAENV_ASK=NO
. oraenv

if [ ! -d "${ORACLE_HOME}" ]
then
  echo
  echo "$ORACLE_HOME does not exist !"
  echo
  exit 1
fi       

# GET A LIST OF ALL THE DATABASE DATAFILES
# 
 sqlplus -s "${USERPASS}" << EOF
set feed off pages 0 head off echo off line 250 trimspool on
spool /tmp/copy1.ksh
select ' echo "Backing Up All Datafiles ..."' from dual;
select ' cp -p '||file_name|| ' ${ORA_BACKUP}/.'
from sys.dba_data_files;
select ' cp -p '||name ||'  ${ORA_BACKUP}/.'
from v\$controlfile;
select ' cp -p '||member ||'  ${ORA_BACKUP}/.'
from v\$logfile;
spool off
exit
EOF
#
# GENERATE SOME DBVERIFY COMMANDS
# 
 sqlplus -s "${USERPASS}" << EOF
set feed off pages 0 head off echo off line 250 trimspool on
spool /tmp/dbv1.ksh
select ' dbv file=${ORA_BACKUP}/'||
        '\`basename '||file_name||'\`'
       from sys.dba_data_files ;
spool off
exit
EOF
#
# SHUT THE DATABASE DOWN
# 
sqlplus "${USERPASS}" << EOF
shutdown immediate
exit
EOF

#
# DO THE COPY AND DBVERIFY IF IT EXISTS
# 
 chmod +x /tmp/copy1.ksh
 chmod +x /tmp/dbv1.ksh

 /tmp/copy1.ksh

#
 if [ -x "${ORACLE_HOME}/bin/dbv" ]  
 then
     echo
     echo Performing DB Verify Check
     /tmp/dbv1.ksh
 fi
#
# STARTUP THE DATABASE 
# 
sqlplus "${USERPASS}" << EOF
startup
exit
EOF

exit 0

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Cold Database Backup

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