Oracle 12c的備份和恢復策略(RMAN備份[開啟歸檔/控制文件/數據文件/歸檔日誌])：
備份策略：
	* 每半年做一個數據庫的全備份（包括所有的數據和只讀表空間） 
	* 每周做一次零級備份
	* 每天做一次一級備份 
*備份前設置rman的參數:configure controlfile autobackup on;(RMAN> show all;查看參數)
--crontab定時任務：
0 1 1 1,7 * oracle /bin/bash /data/oracle/backup/rman_bak_full.sh >>/tmp/rman_backup.log 2>&1
0 1 * * 0 oracle /bin/bash /data/oracle/backup/rman_bak_0.sh >>/tmp/rman_backup.log 2>&1
0 1 * * 1-6 oracle /bin/bash /data/oracle/backup/rman_bak_1.sh >>/tmp/rman_backup.log 2>&1
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一、備份：
1)數據庫全備份的腳本:
#cat /data/oracle/backup/rman_bak_full.sh
#!/bin/bash

export ORACLE_SID=bieeocrl
export ORACLE_BASE=/data/oracle/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/12.1.0.2.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH
export NLS_DATE_FORMAT=‘YYYY-MM-DD HH24:MI:SS‘

curr_t=`date +%Y%m%d%H%M%S`
echo ‘-------------------------------------------‘ | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log
echo ‘Start FULL Backup at ‘`date +%Y-%m-%d:%H:%M:%S` | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log
echo ‘-------------------------------------------‘ | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log

rman target / nocatalog log /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log append<<EOF_RMAN
run {
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
backup full tag ‘dbfull‘ format ‘/data/oracle/backup/bieeocrl/full_bak_%U_%s_%T‘ as compressed backupset database include current controlfile;
sql ‘alter system archive log current‘;
backup archivelog all delete input tag=‘arch_bak‘ format ‘/data/oracle/backup/bieeocrl/arch_%U_%s_%T‘;
backup current controlfile tag=‘ctl_bak‘format ‘/data/oracle/backup/bieeocrl/full_control_%U_%s_%T‘;
backup spfile tag=‘spfile_bak‘ format ‘/data/oracle/backup/bieeocrl/spfile_%U_%s_%T‘;#參數文件備份可選
release channel c1;
release channel c2;
release channel c3;
}
EOF_RMAN
2)零級備份的腳本:
#cat /data/oracle/backup/rman_bak_0.sh
#!/bin/bash

export ORACLE_SID=bieeocrl
export ORACLE_BASE=/data/oracle/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/12.1.0.2.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH
export NLS_DATE_FORMAT=‘YYYY-MM-DD HH24:MI:SS‘

curr_t=`date +%Y%m%d%H%M%S`
echo ‘-------------------------------------------‘ | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log
echo ‘Start level 0 Backup at ‘`date +%Y-%m-%d:%H:%M:%S` | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log
echo ‘-------------------------------------------‘ | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log

rman target / nocatalog log "/data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log" append<<EOF_RMAN
run {
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
backup incremental level 0 tag ‘db0‘ format ‘/data/oracle/backup/bieeocrl/db0_%U_%s_%T‘ as compressed backupset database;
sql ‘alter system archive log current‘;
backup archivelog all delete input tag=‘arch_bak‘ format ‘/data/oracle/backup/bieeocrl/arch0_%U_%s_%T‘;
backup current controlfile tag=‘ctl_bak‘format ‘/data/oracle/backup/bieeocrl/db0_control_%U_%s_%T‘;
backup spfile tag=‘spfile_bak‘ format ‘/data/oracle/backup/bieeocrl/spfile0_%U_%s_%T‘;#參數文件備份可選
release channel c1;
release channel c2;
release channel c3;
}
EOF_RMAN
3)一級備份的腳本:
#cat /data/oracle/backup/rman_bak_1.sh
#!/bin/bash

export ORACLE_SID=bieeocrl
export ORACLE_BASE=/data/oracle/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/12.1.0.2.0/dbhome_1
export PATH=$ORACLE_HOME/bin:$PATH
export NLS_DATE_FORMAT=‘YYYY-MM-DD HH24:MI:SS‘

curr_t=`date +%Y%m%d%H%M%S`
echo ‘-------------------------------------------‘ | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log
echo ‘Start level 1 Backup at ‘`date +%Y-%m-%d:%H:%M:%S` | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log
echo ‘-------------------------------------------‘ | tee >> /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log

rman target / nocatalog log /data/oracle/backup/bieeocrl/rman_bak_${curr_t}.log append<<EOF_RMAN
run {
allocate channel c1 type disk;
allocate channel c2 type disk;
allocate channel c3 type disk;
backup incremental level 1 tag ‘db1‘ format ‘/data/oracle/backup/bieeocrl/db1_%U_%s_%T‘ as compressed backupset database;
sql ‘alter system archive log current‘;
backup archivelog all delete input tag=‘arch_bak‘ format ‘/data/oracle/backup/bieeocrl/arch1_%U_%s_%T‘;
backup current controlfile tag=‘ctl_bak‘format ‘/data/oracle/backup/bieeocrl/db1_control_%U_%s_%T‘;
backup spfile tag=‘spfile_bak‘ format ‘/data/oracle/backup/bieeocrl/spfile1_%U_%s_%T‘;#參數文件備份可選
release channel c1;
release channel c2;
release channel c3;
}
EOF_RMAN
如果按照以上oracle備份策略，則每天的所需要備份的數據量只有一天的改變量。而做恢復時最多要恢復一個零級備份+六個一級備份。
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二、恢復數據庫的過程：
1)rman target / nocatalog
2)RMAN> startup nomount;
3)RMAN> restore spfile from ‘/data/oracle/backup/bieeocrl/db0_%U_%s_%T‘;
4)RMAN> shutdown immediate;
5)RMAN> startup nomount;
6)RMAN> restore controlfile from ‘/data/oracle/backup/bieeocrl/db0_control_%U_%s_%T‘;
7)RMAN> alter database mount;
8)RMAN> catalog start with ‘/data/oracle/backup/bieeocrl/arch0_%U_%s_%T‘;
9)RMAN> run{
allocate channel ch1 type disk;
restore database;
recover database;
release channel ch1;
}
10)RMAN> alter database open resetlogs;
11)RMAN> shutdown immediate;
12)RMAN> startup;
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[原創]Oracle 12c的備份和恢復策略