手工完全恢复（非归档模式下，日志没有被覆盖）

实验环境：red hat 5.8

oracle环境：11.2.0.3

历史日志没有被覆盖，只坏一个文件。

非归档模式，不能offline数据文件，即不能用高可用模式，只能转储，恢复，开库并进行恢复。

 

1、确认数据库是否为归档模式，如果是，则改为非归档模式。

sys@TEST0910> archive log list;

Database log mode              Archive Mode

Automatic archival             Enabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     53

Next log sequence to archive   55

Current log sequence           55

sys@TEST0910> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

sys@TEST0910> startup mount;

ORACLE instance started.

Total System Global Area 2505338880 bytes

Fixed Size                  2230952 bytes

Variable Size             587203928 bytes

Database Buffers         1895825408 bytes

Redo Buffers               20078592 bytes

Database mounted.

sys@TEST0910> alter database noarchivelog;

Database altered.

sys@TEST0910> alter database open;

Database altered.

sys@TEST0910> archive log list;

Database log mode              No Archive Mode

Automatic archival             Disabled

Archive destination            USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence     53

Current log sequence           55

sys@TEST0910> select log_mode from v$database;

LOG_MODE

------------

NOARCHIVELOG

 

 

 

2、重新备份，非归档模式下，只能做冷备份。

冷备份脚本参考：http://blog.csdn.net/rlhua/article/details/11850445

sys@TEST0910> @/u01/app/oracle/bak/cold_bak.sql

host cp /u01/app/oracle/oradata/test0910/disk1/users01.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/example01.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/lxtb01.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/sysaux01.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/system01.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/testtb.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/undotbs01.dbf /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/fast_recovery_area/test0910/control02.ctl /u01/app/oracle/bak/cold_bak

host cp /u01/app/oracle/oradata/test0910/control01.ctl /u01/app/oracle/bak/cold_bak

Database closed.

Database dismounted.

ORACLE instance shut down.

ORACLE instance started.

Total System Global Area 2505338880 bytes

Fixed Size                  2230952 bytes

Variable Size             587203928 bytes

Database Buffers         1895825408 bytes

Redo Buffers               20078592 bytes

Database mounted.

Database opened.

 

3、插入三次数据，分别是提交切换日志，提交不切日志，不提交不切日志。

sys@TEST0910> select count(*) from scott.test5;

  COUNT(*)

----------

        14

sys@TEST0910> insert into scott.test5 select * from scott.emp;

14 rows created.

sys@TEST0910> commit;

Commit complete.

sys@TEST0910> alter system switch logfile;

System altered.

sys@TEST0910> select count(*) from scott.test5;

  COUNT(*)

----------

        28

sys@TEST0910> insert into scott.test5 select * from scott.emp;

14 rows created.

sys@TEST0910> commit;

Commit complete.

sys@TEST0910> select count(*) from scott.test5;

  COUNT(*)

----------

        42

sys@TEST0910> insert into scott.test5 select * from scott.emp;

14 rows created.

sys@TEST0910> select count(*) from scott.test5;

  COUNT(*)

----------

        56

 

 

4、模拟断电

sys@TEST0910> shutdown abort;

ORACLE instance shut down.

 

 

5、删除文件

[oracle@rtest ~]$ rm /u01/app/oracle/oradata/test0910/disk1/users01.dbf

[oracle@rtest ~]$ ls /u01/app/oracle/oradata/test0910/disk1/users01.dbf

ls: /u01/app/oracle/oradata/test0910/disk1/users01.dbf: No such file or directory

 

 

6、起库，报错，查询丢失的数据文件

sys@TEST0910> startup;

ORACLE instance started.

Total System Global Area 2505338880 bytes

Fixed Size                  2230952 bytes

Variable Size             587203928 bytes

Database Buffers         1895825408 bytes

Redo Buffers               20078592 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 4 - see DBWR trace file

ORA-01110: data file 4: '/u01/app/oracle/oradata/test0910/disk1/users01.dbf'

sys@TEST0910> select file#,error from v$recover_file;

     FILE# ERROR

---------- -----------------------------------------------------------------

         4 FILE NOT FOUND

 

 

7、转储数据文件

[oracle@rtest ~]$  cp /u01/app/oracle/bak/cold_bak/users01.dbf /u01/app/oracle/oradata/test0910/disk1/users01.dbf

 

 

8、恢复，开库

Media recovery complete.

sys@TEST0910> alter database open;

Database altered.

sys@TEST0910> select count(*) from scott.test5;

  COUNT(*)

----------

        42