啊，小雪，小雪，来了，来了。从微微的凉风中，从傍晚的喧闹中来了！像春风抖落万树梨花，像天女撒下漫天白絮……你不飘飘悠悠，因为那是骄傲的象征；你不轻轻起舞，因为那是胆小的缩影，听，沙沙沙沙、沙沙沙沙……我好像坐在屋里听那春雨的歌声。
1、数据库环境
数据库DBID及打开模式
SQL> select dbid,open_mode from v$database; DBID OPEN_MODE ---------- ---------- 4106451204 READ WRITE
数据文件:
SQL> select file#,status,enabled,name from v$datafile; FILE# STATUS ENABLED NAME ---------- ------- ---------- -------------------------------------------------------------------------------- 1 SYSTEM READ WRITE /u01/app/oracle/oradata/ocmdb/dfile/system01.dbf 2 ONLINE READ WRITE /u01/app/oracle/oradata/ocmdb/undotbs01.dbf 3 ONLINE READ WRITE /u01/app/oracle/oradata/ocmdb/dfile/sysaux01.dbf 4 ONLINE READ WRITE /u01/app/oracle/oradata/ocmdb/dfile/tbs_1.dbf 5 ONLINE READ WRITE /u01/app/oracle/oradata/ocmdb/dfile/tbs3.dbf 6 ONLINE READ WRITE /u01/app/oracle/oradata/ocmdb/dfile/tbs_big01.dbf 7 ONLINE READ WRITE /u01/app/oracle/oradata/ocmdb/dfile/rman.dbf
控制文件：
SQL> select status,name from v$controlfile; STATUS NAME ------- -------------------------------------------------------------------------------- /u01/app/oracle/ocmdb/cfile/ora_control1 /u01/app/oracle/ocmdb/cfile/ora_control2 /u01/app/oracle/ocmdb/cfile/control3
联机日志：
SQL> select group#,status,type,member from v$logfile; GROUP# STATUS TYPE MEMBER ---------- ------- ------- -------------------------------------------------------------------------------- 1 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo01.log 1 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo11.log 3 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo03.log 2 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo02.log 5 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo05.log 5 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo55.log 4 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo04.log 4 ONLINE /u01/app/oracle/oradata/ocmdb/lfile/redo44.log
2、数据库备份脚本
冷备份脚本
#rem script:coldbak.sh #rem creater:chon #rem date:2011 #rem desc:offline full backup database #--connect database sqlplus / as sysdba <<EOF #--shutdown database shutdown immediate; #--Copy Data file !cp /u01/app/oracle/oradata/ocmdb/dfile/*.dbf /backup !cp /u01/app/oracle/oradata/ocmdb/undotbs01.dbf /backup #--Copy Control file !cp /u01/app/oracle/ocmdb/cfile/* /backup #--Copy Log file !cp /u01/app/oracle/oradata/ocmdb/lfile/*.log /backup #--Copy archive log !cp -R /u01/app/oracle/rmanbak/OCMDB/archivelog/* /backup #--startup database startup;
说明： 1、以上脚本在数据库关闭状态下备份数据库所有的数据文件，联机日志，控制文件，归档日志（在一个目录下），如果成功备份，所有文件是一致的。 2、没有备份参数文件，参数文件可以另外备份，没有必要每次都备份，只需要在改变设置后备份一次。 3、如果以上命令没有成功依次执行，那么备份将是无效的，如连接数据库不成功，那么肯定关闭数据库也不成功，那么备份则无效 4、冷备份建议下人工干预下执行。
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OS热备份 查看表空间和数据文件对应关系
SQL> select file_id,tablespace_name,file_name from dba_data_files; FILE_ID TABLESPACE_NAME FILE_NAME ---------- ------------------------------ -------------------------------------------------------------------------------- 7 RMAN_TS /u01/app/oracle/oradata/ocmdb/dfile/rman.dbf 6 BIG_TBS /u01/app/oracle/oradata/ocmdb/dfile/tbs_big01.dbf 5 TBS3 /u01/app/oracle/oradata/ocmdb/dfile/tbs3.dbf 4 TBS_1 /u01/app/oracle/oradata/ocmdb/dfile/tbs_1.dbf 3 SYSAUX /u01/app/oracle/oradata/ocmdb/dfile/sysaux01.dbf 2 UNDOTBS /u01/app/oracle/oradata/ocmdb/undotbs01.dbf 1 SYSTEM /u01/app/oracle/oradata/ocmdb/dfile/system01.dbf
数据库OS热全备份脚本
#rem script:hotbak.sh #rem creater:chon #rem date:2011 #rem desc:backup all database datafile in archive #--connect database sqlplus / as sysdba <<EOF #--archive alter system archive log current; #--start hotbak alter tablespace system begin backup; !cp /u01/app/oracle/oradata/ocmdb/dfile/system01.dbf /backup alter tablespace system end backup; alter tablespace UNDOTBS begin backup; !cp /u01/app/oracle/oradata/ocmdb/undotbs01.dbf /backup alter tablespace UNDOTBS end backup; alter tablespace SYSAUX begin backup; !cp /u01/app/oracle/oradata/ocmdb/dfile/sysaux01.dbf /backup alter tablespace SYSAUX end backup; alter tablespace TBS_1 begin backup; !cp /u01/app/oracle/oradata/ocmdb/dfile/tbs_1.dbf /backup alter tablespace TBS_1 end backup; alter tablespace TBS3 begin backup; !cp /u01/app/oracle/oradata/ocmdb/dfile/tbs3.dbf /backup alter tablespace TBS3 end backup; alter tablespace BIG_TBS begin backup; !cp /u01/app/oracle/oradata/ocmdb/dfile/tbs_big01.dbf /backup alter tablespace BIG_TBS end backup; alter tablespace RMAN_TS begin backup; !cp /u01/app/oracle/oradata/ocmdb/dfile/rman.dbf /backup alter tablespace RMAN_TS end backup; #--end #--bak control file #--binary alter database backup controlfile to '/backup/controlbinbak.000'; #--ascii alter database backup controlfile to trace; alter system archive log current;
说明： 1、热备份必须在数据库归档方式下才可以运行 2、以上脚本可以在数据库运行状态下备份数据库所有的数据文件（除了临时数据文件），没有必要备份联机日志。 3、归档日志至少需要一次完整备份之后的所有日志。 4、如果以上命令没有成功依次执行，那么备份也是无效的，如连接数据库不成功，那么备份则无效
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RMAN备份脚本 --本地
创建文件夹
mkdir /home/oracle/backup mkdir /home/oracle/backup/script mkdir /home/oracle/backup/log mkdir /home/oracle/backup/export
--备份目的地
mkdir /home/oracle/rman_backup
创建备份表空间
create tablespace rman_tbs datafile '/oradata/luke/rman_tbs01.dbf' size 1024M;
创建备份用户
create user rman identified by rman default tablespace rman_tbs temporary tablespace temp;
grant connect,resource ,recovery_catalog_owner to rman;
rman catalog rman/rman
create catalog tablespace rman_tbs;
connect target sys/lukewhx@luke
register database;
report schema;
configure retention policy to redundancy 2;
configure retention policy to recovery window of 7 days;
--倒出RMAN用户数据脚本exp_rman.par (即备份catalog库）
userid=rman/rman
file=/home/oracle/backup/export/rman.dmp
log=/home/oracle/backup/log/rman.log
-- 倒出RMAN数据SHELL脚本exp_rman.sh
#!/bin/bash
cd $HOME
. .bash_profile
cd $HOME/backup/script
exp parfile=exp_rman.par
-- 零级备份RMAN脚本level0_backup.rcv
connect catalog rman/rman
connect target sys/unumall@unu2
run {
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
allocate channel d1 type disk;
allocate channel d2 type disk;
backup incremental level 0 database format '/home/oracle/rman_backup/level0_%d_%s_%p_%u.bak'
tag='level 0' include current controlfile;
sql 'alter system archive log current';
backup archivelog all format '/home/oracle/rman_backup/log_%d_%s_%p_%u.bak' delete all input;
release channel d2;
release channel d1;
}
crosscheck backup;
delete noprompt expired backup;
delete noprompt obsolete;
resync catalog;
--零级备份SHELL脚本的level0_backup.sh
#!/bin/bash
cd $HOME
. .bash_profile
cd $HOME/backup/script
rman cmdfile=level0_backup.rcv msglog=$HOME/backup/log/level0_backup.log
. /home/oracle/backup/script/exp_rman.sh
--一级差异增量备份RMAN脚本 level1_backup.rcv
connect catalog rman/rman
connect target sys/luke@luke
run {
allocate channel d1 type disk;
backup incremental level 1 format '/home/oracle/rman_backup/level1_%d_%s_%p_%u.bak' tag = 'level 1' database;
sql 'alter system archive log current';
backup archivelog all format '/home/oracle/rman_backup/log_%d_%s_%p_%u.bak' delete all input;
release channel d1;
}
crosscheck backup;
delete noprompt expired backup;
delete noprompt obsolete;
resync catalog;
--一级差异增量备份SHELL脚本level1_backup.sh
#!/bin/bash
cd $HOME
. .bash_profile
cd /home/oracle/backup/script
rman cmdfile=level1_backup.rcv msglog=$HOME/backup/log/level1.log
. /home/oracle/backup/script/exp_rman.sh
--二级差异增量备份RMAN脚本 level2_backup.rcv
connect catalog rman/rman
connect target sys/luke@luke
run {
allocate channel d1 type disk;
backup incremental level 2 format '/home/oracle/rman_backup/level2_%d_%s_%p_%u.bak' tag = 'level 2' database;
sql 'alter system archive log current';
backup archivelog all format '/home/oracle/rman_backup/log_%d_%s_%p_%u.bak' delete all input;
release channel d1;
}
crosscheck backup;
delete noprompt expired backup;
delete noprompt obsolete;
resync catalog;
--二级差异增量备份SHELL脚本level2_backup.sh
#!/bin/bash cd $HOME . .bash_profile cd /home/oracle/backup/script rman cmdfile=level2_backup.rcv msglog=$HOME/backup/log/level2.log . /home/oracle/backup/script/exp_rman.sh
提高 RMAN增量备份性能
alter database enable block change tracking using file '/u01/app/oracle/admin/devdb/bdump/luke.log'; desc v$block_change_tracking;
linux下定时执行备份脚本
crontab -e -u oracle SHELL=/bin/bash --以下脚本在bash下执行 MAILTO=oracle --执行日志以邮件形式邮给oracle用户，可以/var/spool/mail/oracle下查收 10 1 * * 0 /home/oracle/backup/script/level0_backup.sh 10 1 * * 1 /home/oracle/backup/script/level2_backup.sh 10 1 * * 2 /home/oracle/backup/script/level2_backup.sh 10 1 * * 3 /home/oracle/backup/script/level1_backup.sh 10 1 * * 4 /home/oracle/backup/script/level2_backup.sh 10 1 * * 5 /home/oracle/backup/script/level2_backup.sh 10 1 * * 6 /home/oracle/backup/script/level2_backup.sh
一周差异备份策略： 备份目标库和catalog库 周日0级全备，周一周二为2级，周三为1级，周四周五周六为2级。 每天凌晨1点10分开始备份
零级备份
backup incremental level 0 database;
一级差异增量 差异增量是默认增量备份方式
backup incremental level 1 database;
一级累计增量
backup incremental level 1 cumulative database;
总结
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