教你快速掌握Oracle数据库的备份策略

每半年做一个数据库的全备份（包括所有的数据和只读表空间）

每一个月做一次零级备份（不包含只读表空间）

每个星期做一次一级备份

每天做一次二级备份

任何数据库的更改需要重新同步CATALOG目录并重新备份（如添加数据文件）或重新备份（如修改表空间为只读）

每次备份后都可以备份归档日志或定期备份归档日志。

如果可能，可以直接备份到磁带上。

数据库全备份的脚本

run{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

backup full tag ‘dbfull’ format ‘/u01/oradata/backup/full%u_%s_%p’ database

include current controlfile;

sql ‘alter system archive log current’;

backup fileaperset 3 format ‘/u01/oradata/backup/arch%u_%s_%p’

archivelog all delete input; #备份归档可选，可以单独定期备份

release channel c1;

release channel c2;

release channel c3;

}

零级备份的脚本

run{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

backup incremental level 0 tag ‘db0’ format ‘/u01/oradata/backup/db0%u_%s_%p’

database skip readonly;

sql ‘alter system archive log current’;

backup fileaperset 3 format ‘/u01/oradata/backup/arch%u_%s_%p’

archivelog all delete input; #备份归档可选，可以单独定期备份

release channel c1;

release channel c2;

release channel c3;

}

同理，我们可以得到一级备份，二级备份的脚本，如一级备份的脚本

run{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

backup incremental level 1 tag ‘db1’ format ‘/u01/oradata/backup/db1%u_%s_%p’

database skip readonly;

sql ‘alter system archive log current’;

backup fileaperset 3 format ‘/u01/oradata/backup/arch%u_%s_%p’

archivelog all delete input; #备份归档可选，可以单独定期备份

release channel c1;

release channel c2;

release channel c3;

}

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