Oracle用户管理的不完全恢复2：基于取消的恢复

模拟生产库场景

1.1关闭数据库

1 SQL> shutdown immediate

2 Database closed.

3 Database dismounted.

4 ORACLE instance shut down.

5 SQL> 

1.2.冷备

 1 -bash-3.00$ cp /u01/oradata/sunbak/*   . 

 2 -bash-3.00$ ls -l

 3 total 2214344

 4 -rw-r-----   1 oracle   oinstall 7389184 Jan 25 23:36 control01.ctl

 5 -rw-r-----   1 oracle   oinstall 7389184 Jan 25 23:37 control02.ctl

 6 -rw-r-----   1 oracle   oinstall 7389184 Jan 25 23:37 control03.ctl

 7 -rw-r-----   1 oracle   oinstall 104865792 Jan 25 23:37 example01.dbf

 8 -rw-r-----   1 oracle   oinstall 52429312 Jan 25 23:37 redo01.log

 9 -rw-r-----   1 oracle   oinstall 52429312 Jan 25 23:38 redo02.log

10 -rw-r-----   1 oracle   oinstall 52429312 Jan 25 23:38 redo03.log

11 -rw-r-----   1 oracle   oinstall 10493952 Jan 25 23:38 sun01_1.dbf

12 -rw-r-----   1 oracle   oinstall 10493952 Jan 25 23:38 sun02_1.dbf

13 -rw-r-----   1 oracle   oinstall 5251072 Jan 25 23:38 sun03_1.dbf

14 -rw-r-----   1 oracle   oinstall 262152192 Jan 25 23:38 sysaux01.dbf

15 -rw-r-----   1 oracle   oinstall 503324672 Jan 25 23:39 system01.dbf

16 -rw-r-----   1 oracle   oinstall 20979712 Jan 25 23:39 temp01.dbf

17 -rw-r-----   1 oracle   oinstall 31465472 Jan 25 23:39 undotbs01.dbf

18 -rw-r-----   1 oracle   oinstall 5251072 Jan 25 23:39 users01.dbf

19 -bash-3.00$

1.3.开启数据库插入数据

 1 SQL> startup 

 2 ORACLE instance started.

 3 

 4 Total System Global Area  289406976 bytes

 5 Fixed Size                  1279820 bytes

 6 Variable Size              79694004 bytes

 7 Database Buffers          205520896 bytes

 8 Redo Buffers                2912256 bytes

 9 Database mounted.

10 Database opened.

11 SQL>

1.4 插入数据

 1 SQL> select * from t order by 1;

 2 

 3         ID NAME

 4 ---------- ----------------

 5          0 oracle

 6          1 oracle

 7          2 oracle

 8          3 oracle

 9          4 oracle

10          5 oracle

11          6 oracle

12 

13 7 rows selected.

14 

15 SQL> insert into t values (8,'mysql');

16 

17 1 row created.

18 

19 SQL> commit;

20 

21 Commit complete.

22 

23 SQL> 

1.5“mysql”写入数据文件

1 SQL> alter system checkpoint;

2 

3 System altered.

4 

5 SQL> 

6 -bash-3.00$ strings /u01/oradata/sunbak/sun01_1.dbf |grep mysql

7 mysql,

8 -bash-3.00$ 

1.6 归档（“mysql”已经被归档）

 1 SQL> alter system switch logfile;

 2 

 3 System altered.

 4 

 5 SQL> 

 6 -bash-3.00$ strings 1_4_805672882.dbf|grep mysql                                                                                   

 7 mysql

 8 -bash-3.00$

 9 

10 此时"mysql"存在两种类型文件中

1.7 再插入数据（"mysql01"）

1 SQL> insert into t values(9,'mysql01');

2 

3 1 row created.

4 

5 SQL> commit;

6 

7 Commit complete.

8 

9 SQL> 

1.8 将数据写入数据文件

 1 SQL> alter system checkpoint;

 2 

 3 System altered.

 4 

 5 SQL> 

 6 -bash-3.00$ strings sun01_1.dbf|grep mysql01

 7 myslq01,

 8 -bash-3.00$ 

 9 

10 #此时mysql01并未写入归档日志文件中

1.9 备份控制文件

1 SQL> alter database backup controlfile to trace as '/u01/admin/sun/udump/ctl20130129.sql';

2 

3 Database altered.

4 

5 SQL> 

2.模拟破坏场景
2.1 删除数据文件，控制文件，日志文件，归档日志文件保留（"myslq"还存在，"mysql01"已不存在）

 1 -bash-3.00$ pwd

 2 /u01/oradata/sunbak

 3 -bash-3.00$ ls -l

 4 total 2215712

 5 -rw-r-----   1 oracle   oinstall 7389184 Jan 26 00:14 control01.ctl

 6 -rw-r-----   1 oracle   oinstall 7389184 Jan 26 00:14 control02.ctl

 7 -rw-r-----   1 oracle   oinstall 7389184 Jan 26 00:14 control03.ctl

 8 -rw-r-----   1 oracle   oinstall 104865792 Jan 26 00:02 example01.dbf

 9 -rw-r-----   1 oracle   oinstall 52429312 Jan 26 00:14 redo01.log

10 -rw-r-----   1 oracle   oinstall 52429312 Jan 25 23:57 redo02.log

11 -rw-r-----   1 oracle   oinstall 52429312 Jan 25 23:53 redo03.log

12 -rw-r-----   1 oracle   oinstall 10493952 Jan 26 00:02 sun01_1.dbf

13 -rw-r-----   1 oracle   oinstall 10493952 Jan 26 00:02 sun02_1.dbf

14 -rw-r-----   1 oracle   oinstall 5251072 Jan 26 00:02 sun03_1.dbf

15 -rw-r-----   1 oracle   oinstall 262152192 Jan 26 00:14 sysaux01.dbf

16 -rw-r-----   1 oracle   oinstall 503324672 Jan 26 00:14 system01.dbf

17 -rw-r-----   1 oracle   oinstall 20979712 Jan 25 22:02 temp01.dbf

18 -rw-r-----   1 oracle   oinstall 31465472 Jan 26 00:09 undotbs01.dbf

19 -rw-r-----   1 oracle   oinstall 5251072 Jan 26 00:02 users01.dbf

20 -bash-3.00$ rm -f *

21 -bash-3.00$ 

2.2 关闭数据库

1 SQL> shutdown abort

2 ORACLE instance shut down.

3 SQL>

2.3 将备份数据库文件拷贝过来

1 -bash-3.00$ pwd

2 /u01/oradata/sunbak

3 -bash-3.00$ 

4 -bash-3.00$ cp /tmp/cold/* .

5 -bash-3.00$ 

2.4将数据库开到mount

 1 SQL> startup mount

 2 ORACLE instance started.

 3 

 4 Total System Global Area  289406976 bytes

 5 Fixed Size                  1279820 bytes

 6 Variable Size              79694004 bytes

 7 Database Buffers          205520896 bytes

 8 Redo Buffers                2912256 bytes

 9 Database mounted.

10 SQL> 

2.5 恢复

 1 SQL> recover database using backup controlfile until cancel;

 2 ORA-00279: change 697462 generated at 01/25/2013 23:34:43 needed for thread 1

 3 ORA-00289: suggestion : /u01/admin/sun/arch/1_3_805672882.dbf

 4 ORA-00280: change 697462 for thread 1 is in sequence #3

 5 

 6 #注 查看

 7 #-bash-3.00$ ls -l /u01/admin/sun/arch/1_3_805672882.dbf

 8 #-rw-r-----   1 oracle   oinstall  299520 Jan 25 23:53 /u01/admin/sun/arch/1_3_805672882.dbf

 9 #-bash-3.00$ 

10 #Specify log: {<RET>=suggested | filename | AUTO | CANCEL}

11 

12 ORA-00279: change 698002 generated at 01/25/2013 23:53:32 needed for thread 1

13 ORA-00289: suggestion : /u01/admin/sun/arch/1_4_805672882.dbf

14 ORA-00280: change 698002 for thread 1 is in sequence #4

15 ORA-00278: log file '/u01/admin/sun/arch/1_3_805672882.dbf' no longer needed

16 for this recovery

17 

18 #此时 /u01/admin/sun/arch/1_4_805672882.dbf 文件不存在，故cancel

19 Specify log: {<RET>=suggested | filename | AUTO | CANCEL}

20 cancel

21 Media recovery cancelled.

22 SQL>

3.开启数据库

1 SQL> alter database open resetlogs;

2 

3 Database altered.

4 

5 SQL>

4.查看结果

 1 SQL> select * from user1.t order by 1;

 2 

 3         ID NAME

 4 ---------- ----------------

 5          0 oracle

 6          1 oracle

 7          2 oracle

 8          3 oracle

 9          4 oracle

10          5 oracle

11          6 oracle

12          7 oracle

13          8 mysql

14 

15 8 rows selected.

16 

17 SQL>