冷备份数据库
冷备份数据库
非open的数据库
优点:概念简单,执行简单,可靠性依存cp
缺点:停止数据库,整体备份
什么时候需要冷备份:重大事件(不完全恢复实验之前,上线之前,崩溃恢复之前之后,)
步骤
1.一致性停
2.拷贝
3.启动
查出物理文件位置
select name from v$datafile
union all
select name from v$controlfile
union all
select member from v$logfile
实验
1.存在冷备
2.删除原来的文件
3.将备份恢复到/db254/...
4.启动到open
__________________________________________________
SQL> conn /as sysdba
startu[
Connected to an idle instance.
SQL> SP2-0042: unknown command "startu[" - rest of line ignored.
SQL> startup
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 100664912 bytes
Database Buffers 180355072 bytes
Redo Buffers 2973696 bytes
Database mounted.
Database opened.
SQL>
select name from v$datafile
union all
select name from v$controlfile
union all
5 select member from v$logfile
6 /
NAME
--------------------------------------------------
/u01/oracle/oradata/ora10g/system01.dbf
/u01/oracle/oradata/ora10g/undotbs01.dbf
/u01/oracle/oradata/ora10g/sysaux01.dbf
/u01/oracle/oradata/ora10g/users01.dbf
/u01/oracle/oradata/ora10g/mytbs01.dbf
/u01/oracle/oradata/ora10g/mytbs02.dbf
/u01/oracle/oradata/ora10g/abc.dbf
/u01/oracle/oradata/ora10g/ceshi/db/ORA10G/datafil
e/o1_mf_mytbs1_9dndqzcf_.dbf
/u01/oracle/oradata/ora10g/ceshi/db/ORA10G/datafil
e/o1_mf_erikxue_9dndskhp_.dbf
/u01/oracle/oradata/ora10g/control01.ctl
/u01/oracle/oradata/ora10g/control02.ctl
/u01/oracle/oradata/ora10g/control03.ctl
/u01/oracle/oradata/ora10g/redo03.log
/u01/oracle/oradata/ora10g/redo02.log
/u01/oracle/oradata/ora10g/redo01.log
/u01/oracle/flash_recovery_area/ORA10G/onlinelog/o
1_mf_4_9dndl8dh_.log
/u01/oracle/oradata/ora10g/ceshi/log/ORA10G/online
log/o1_mf_5_9dndybf6_.log
17 rows selected.