Oracle11G RMAN备份跟恢复笔记(二)
非catalog各种备份方式:
全库备份
backup database;
增量备份:
backup incremental level=0 database;
backup incremental level=1 database;
备注:level1级别备份在level0级别基础上才可以做.
备份归档日志:
backup database plus archivelog delete input;
备份表空间:
backup tablespace tbs_name;
备份控制文件:
backup current controlfile;
backup database include current controlfile;
备份数据文件:
backup datafile datafile_no;
RMAN典型增量备份案例
星期天: level 0 backup
星期一: level 2 backuplevel 0 backup
星期二: level 2 backup
星期三: level 1 backup
星期四: level 2 backup
星期五: level 2 backup
星期六: level 2 backup
实现思路:备份脚本+crontab
bakl0.sh
run{
allocate channel channel0 type disk;
backup
incremental level 0
format '/u01/rmanbak/inc0_%d_u_%T'
tag db_inc0
database;
release channel channel0;
}
bakl1.sh
run{
allocate channel channel1 type disk;
backup
incremental level 1
format '/u01/rmanbak/inc1_%d_u_%T'
tag db_inc1
database;
release channel channel1;
}
bakl2.sh
run{
allocate channel channel2 type disk;
backup
incremental level 2
format '/u01/rmanbak/inc2_%d_u_%T'
tag db_inc2
database;
release channel channel2;
}
执行脚本:
rman target /msglog=bakl0.log cmdfile=bakl0.sh
rman target /msglog=bakl1.log cmdfile=bakl1.sh
rman target /msglog=bakl2.log cmdfile=bakl2.sh
添加自动执行的crontab
crontab -e -u oracle(用户的定时计划)
45 23 * * 0 rman target /msglog=bakl0.log cmdfile=bakl0.sh
45 23 * * 1 rman target /msglog=bakl2.log cmdfile=bakl2.sh
45 23 * * 2 rman target /msglog=bakl2.log cmdfile=bakl2.sh
45 23 * * 3 rman target /msglog=bakl1.log cmdfile=bakl1.sh
45 23 * * 4 rman target /msglog=bakl2.log cmdfile=bakl2.sh
45 23 * * 5 rman target /msglog=bakl2.log cmdfile=bakl2.sh
45 23 * * 6 rman target /msglog=bakl2.log cmdfile=bakl2.sh
备注:建议指定全路径
重新启动定时任务服务
service crond restart;
备注:防止磁盘空间不足.
建议在使用rman备份注意一下两点:
1.dbid
2.配置.
configure controlfile autobackup on;
backup database plus archivelog delete input;
例如:
backup format '/u01/rman/bak/full_%d_%t.bk' database plus archivelog delete input;
查看备份文件的目录:
show parameter db_recovery_file_dest;
show parameter db_recovery_file_dest_size;
查看恢复目录使用情况:
select * from v$flash_recovery_area_usage;
查看rman中默认的参数信息
show all;