RMAN备份对于Oracle数据库的备份与恢复简单易用，成本低廉。对于使用非catalog方式而言，将RMAN脚本嵌入到shell脚本，然后再通过crontab来实现中小型数据库数据库备份无疑是首选。本文提供了一个简单易用的基于linux shell下的RMAN备份脚本供参考。大家可根据自己的需要进行适当调整。
下面是脚本的具体内容
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if [ -f ~/.bash_profile ]; then . ~/.bash_profile fi ORACLE_SID=${1}; export ORACLE_SID RMAN_LEVEL=${2}; export RMAN_LEVEL TIMESTAMP=`date +%Y%m%d%H%M`; export TIMESTAMP DATE=`date +%Y%m%d`; export DATE RMAN_DIR=/u02/database/${ORACLE_SID}/backup/rman; export RMAN_DIR RMAN_DATA=${RMAN_DIR}/${DATE}; export RMAN_DATA RMAN_LOG=/u02/database/${ORACLE_SID}/backup/rman/log export RMAN_LOG if [ "$RMAN_LEVEL" == "F" ]; then unset INCR_LVL BACKUP_TYPE=full else INCR_LVL="INCREMENTAL LEVEL ${RMAN_LEVEL}" BACKUP_TYPE=lev${RMAN_LEVEL} fi RMAN_FILE=${RMAN_DATA}/${ORACLE_SID}_${BACKUP_TYPE}_${TIMESTAMP}; export RMAN_FILE SSH_LOG=${RMAN_LOG}/${ORACLE_SID}_${BACKUP_TYPE}_${TIMESTAMP}.log; export SSH_LOG MAXPIECESIZE=4G; export MAXPIECESIZE if ! test -d ${RMAN_DATA} then mkdir -p ${RMAN_DATA} fi echo "---------------------------------" >>${SSH_LOG} echo " " >>${SSH_LOG} echo "Rman Begin to Working ........." >>${SSH_LOG} echo "Begin time at:" `date` --`date +%Y%m%d%H%M` >>${SSH_LOG} $ORACLE_HOME/bin/rman log=${RMAN_FILE}.log <<EOF connect target / run { CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 3 DAYS; CONFIGURE BACKUP OPTIMIZATION ON; CONFIGURE CONTROLFILE AUTOBACKUP ON; CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '${RMAN_FILE}_%F'; ALLOCATE CHANNEL 'ch1' TYPE DISK maxpiecesize=${MAXPIECESIZE}; ALLOCATE CHANNEL 'ch2' TYPE DISK maxpiecesize=${MAXPIECESIZE}; set limit channel ch1 readrate=10240; set limit channel ch1 kbytes=4096000; set limit channel ch2 readrate=10240; set limit channel ch2 kbytes=4096000; CROSSCHECK ARCHIVELOG ALL; DELETE NOPROMPT EXPIRED ARCHIVELOG ALL; BACKUP ${INCR_LVL} DATABASE FORMAT '${RMAN_FILE}_%U' TAG '${ORACLE_SID}_${BACKUP_TYPE}_${TIMESTAMP}'; SQL 'ALTER SYSTEM ARCHIVE LOG CURRENT'; BACKUP ARCHIVELOG ALL FORMAT '${RMAN_FILE}_arc_%U' TAG '${ORACLE_SID}_arc_${TIMESTAMP}' DELETE INPUT; DELETE NOPROMPT OBSOLETE; RELEASE CHANNEL ch1; RELEASE CHANNEL ch2; } sql "alter database backup controlfile to ''${RMAN_DATA}/cntl_${BACKUP_TYPE}.bak''"; exit; EOF RC=$? cat ${RMAN_FILE}.log >>${SSH_LOG} echo "Rman Stop working @ time:"`date` `date +%Y%m%d%H%M` >>${SSH_LOG} echo >>${SSH_LOG} echo "------------------------" >>${SSH_LOG} echo "------ Disk Space ------" >>${SSH_LOG} df -h >>${SSH_LOG} echo >>${SSH_LOG} if [ $RC -ne "0" ]; then echo "------ error ------" >>${SSH_LOG} else echo "------ no error found during RMAN backup peroid------" >>${SSH_LOG} rm -rf ${RMAN_FILE}.log fi RMDIR=${RMAN_DIR}/`/bin/date +%Y%m%d -d "3 days ago"`; export RMDIR echo >>${SSH_LOG} echo -e "------Remove old backup than 3 days ------\n" >>${SSH_LOG} if test -d ${RMDIR} then rm -rf ${RMDIR} RC=$? fi echo >>${SSH_LOG} if [ $RC -ne "0" ]; then echo -e "------ Remove old backup exception------ \n" >>${SSH_LOG} else echo -e "------ no error found during remove old backup set peroid------ \n" >>${SSH_LOG} fi exit oracle@SZDB:~/robinson/scripts/dba_scripts/custom/sql> ./db_bak_rman.sh GOBO1 0 RMAN> RMAN> 2> 3> 4> 5> 6> 7> 8> 9> 10> 11> 12> 13> 14> 15> 16> 17> 18> 19> 20> 21> 22> 23> 24> RMAN> RMAN> oracle@SZDB:~/robinson/scripts/dba_scripts/custom/sql> oracle@SZDB:/u02/database/GOBO1/backup/rman> ls 20120928 log oracle@SZDB:/u02/database/GOBO1/backup/rman/20120928> ls cntl_lev0.bak GOBO1_lev0_201209281421_arc_4onmb9ro_1_1 GOBO1_lev0_201209281421_4knmb9jn_1_1 GOBO1_lev0_201209281421_c-733951103-20120928-00 GOBO1_lev0_201209281421_4lnmb9jn_1_1 GOBO1_lev0_201209281421_c-733951103-20120928-01 GOBO1_lev0_201209281421_arc_4nnmb9rn_1_1 