您在这里：首页 > 学员专区 > 技术文章

Oracle 基于用户管理的不完全恢复（四）

案例3——在做完全恢复时，丢失了部分归档日志（recover database until cancel;）

1、基于cancel 的不完全恢复

——模拟环境

SQL> col table_name for a20

SQL> col tablespace_name for a10

SQL> select table_name,tablespace_name from user_tables;

TABLE_NAME TABLESPACE

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

DEPT USERS

EMP USERS

BONUS USERS

SALGRADE USERS

EMPLOYEES USERS

EMP2 USERS

TB02 CUUG

TB01 TEST

ADMIN_EXT_EMPLOYEES

EMP1 USERS

10 rows selected.

SQL> conn /as sysdba

Connected.

SQL> select * from scott.tb02;

----------

8 rows selected.

SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARCHIVED STATUS FIRST_CHANGE# FIRST_TIME

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

1 1 1 104857600 3 YES INACTIVE 851230 2012-03-23 16:04:13

4 1 4 104857600 3 NO CURRENT 851518 2012-03-23 16:13:25

3 1 3 104857600 3 YES INACTIVE 851509 2012-03-23 16:13:09

2 1 2 104857600 3 YES INACTIVE 851500 2012-03-23 16:12:53

SQL> insert into scott.tb02 values(9);

1 row created.

SQL> commit;

Commit complete.

SQL> alter system archive log current;

System altered.

SQL> insert into scott.tb02 values(10);

1 row created.

SQL> commit;

Commit complete.

SQL> alter system archive log current;

System altered.

SQL> insert into scott.tb02 values(11);

1 row created.

SQL> commit;

Commit complete.

SQL> alter system archive log current;

System altered.

SQL> select name from v$archived_log;

NAME

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

/disk1/arch/anny/arch_1_3_778691360.log

/disk1/arch/anny/arch_1_4_778691360.log

/disk1/arch/anny/arch_1_5_778691360.log

/disk1/arch/anny/arch_1_6_778691360.log

/disk1/arch/anny/arch_1_1_778694653.log

/disk1/arch/anny/arch_1_2_778694653.log

/disk1/arch/anny/arch_1_3_778694653.log

/disk1/arch/anny/arch_1_4_778694653.log

/disk1/arch/anny/arch_1_5_778694653.log

/disk1/arch/anny/arch_1_6_778694653.log

52 rows selected.

SQL> select * from scott.tb02;

----------

11 rows selected.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

——users 表空间datafile被误删除

[oracle@solaris10 ~]$rm /u01/app/oracle/oradata/anny/cuug01.dbf

[oracle@solaris10 ~]$mv /disk1/arch/anny/arch_1_1_778694653.log /disk1/arch/anny/arch_1_1_778694653.log.bak

[oracle@solaris10 ~]$mv /disk1/arch/anny/arch_1_2_778694653.log /disk1/arch/anny/arch_1_2_778694653.log.bak

[oracle@solaris10 ~]$

——做完全恢复

SQL> startup

ORACLE instance started.

Total System Global Area 314572800 bytes

Fixed Size 1279964 bytes

Variable Size 58722340 bytes

Database Buffers 251658240 bytes

Redo Buffers 2912256 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 12 - see DBWR trace file

ORA-01110: data file 12: '/u01/app/oracle/oradata/anny/cuug01.dbf'

SQL> select file#,error from v$recover_file;

FILE# ERROR

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

12 FILE NOT FOUND

1 row selected.

——启动database 失败，restore datafile

[oracle@solaris10 ~]$cp /disk1/backup/anny/cold_bak/cuug01.dbf /u01/app/oracle/oradata/anny/

——recover datafile

SQL> recover datafile 12;

ORA-00279: change 850758 generated at 03/23/2012 15:29:42 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_1_778691360.log

ORA-00280: change 850758 for thread 1 is in sequence #1

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

auto

ORA-00279: change 850903 generated at 03/23/2012 15:35:17 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_2_778691360.log

ORA-00280: change 850903 for thread 1 is in sequence #2

ORA-00278: log file '/disk1/arch/anny/arch_1_1_778691360.log' no longer needed for this recovery

ORA-00279: change 851178 generated at 03/23/2012 15:43:29 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_3_778691360.log

ORA-00280: change 851178 for thread 1 is in sequence #3

ORA-00278: log file '/disk1/arch/anny/arch_1_2_778691360.log' no longer needed for this recovery

ORA-00279: change 851181 generated at 03/23/2012 15:43:30 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_4_778691360.log

ORA-00280: change 851181 for thread 1 is in sequence #4

ORA-00278: log file '/disk1/arch/anny/arch_1_3_778691360.log' no longer needed for this recovery

ORA-00279: change 851183 generated at 03/23/2012 15:43:31 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_5_778691360.log

ORA-00280: change 851183 for thread 1 is in sequence #5

ORA-00278: log file '/disk1/arch/anny/arch_1_4_778691360.log' no longer needed for this recovery

ORA-00279: change 851187 generated at 03/23/2012 15:43:36 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_6_778691360.log

ORA-00280: change 851187 for thread 1 is in sequence #6

ORA-00278: log file '/disk1/arch/anny/arch_1_5_778691360.log' no longer needed for this recovery

ORA-00279: change 851230 generated at 03/23/2012 16:04:13 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_1_778694653.log

ORA-00280: change 851230 for thread 1 is in sequence #1

ORA-00278: log file '/disk1/arch/anny/arch_1_6_778691360.log' no longer needed for this recovery

ORA-00308: cannot open archived log '/disk1/arch/anny/arch_1_1_778694653.log'

ORA-27037: unable to obtain file status

Intel SVR4 UNIX Error: 2: No such file or directory

Additional information: 3

——完全恢复失败，缺少归档日志：（/disk1/arch/anny/arch_1_1_778694653.log）

SQL> alter database open;

alter database open

ERROR at line 1:

ORA-01113: file 12 needs media recovery

ORA-01110: data file 12: '/u01/app/oracle/oradata/anny/cuug01.dbf'

——只能做基于cancel的不完全恢复

——转储所有的datafile

[oracle@solaris10 ~]$cp /disk1/backup/anny/cold_bak/*.dbf /u01/app/oracle/oradata/anny/

SQL> recover database until cancel;——第一次选择auto

ORA-00279: change 850758 generated at 03/23/2012 15:29:42 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_1_778691360.log

ORA-00280: change 850758 for thread 1 is in sequence #1

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

auto

ORA-00279: change 850903 generated at 03/23/2012 15:35:17 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_2_778691360.log

ORA-00280: change 850903 for thread 1 is in sequence #2

ORA-00278: log file '/disk1/arch/anny/arch_1_1_778691360.log' no longer needed for this recovery

ORA-00279: change 851178 generated at 03/23/2012 15:43:29 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_3_778691360.log

ORA-00280: change 851178 for thread 1 is in sequence #3

ORA-00278: log file '/disk1/arch/anny/arch_1_2_778691360.log' no longer needed for this recovery

ORA-00279: change 851181 generated at 03/23/2012 15:43:30 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_4_778691360.log

ORA-00280: change 851181 for thread 1 is in sequence #4

ORA-00278: log file '/disk1/arch/anny/arch_1_3_778691360.log' no longer needed for this recovery

ORA-00279: change 851183 generated at 03/23/2012 15:43:31 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_5_778691360.log

ORA-00280: change 851183 for thread 1 is in sequence #5

ORA-00278: log file '/disk1/arch/anny/arch_1_4_778691360.log' no longer needed for this recovery

ORA-00279: change 851187 generated at 03/23/2012 15:43:36 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_6_778691360.log

ORA-00280: change 851187 for thread 1 is in sequence #6

ORA-00278: log file '/disk1/arch/anny/arch_1_5_778691360.log' no longer needed for this recovery

ORA-00279: change 851230 generated at 03/23/2012 16:04:13 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_1_778694653.log

ORA-00280: change 851230 for thread 1 is in sequence #1

ORA-00278: log file '/disk1/arch/anny/arch_1_6_778691360.log' no longer needed for this recovery

ORA-00308: cannot open archived log '/disk1/arch/anny/arch_1_1_778694653.log'

ORA-27037: unable to obtain file status

Intel SVR4 UNIX Error: 2: No such file or directory

Additional information: 3

SQL> recover database until cancel;

ORA-00279: change 851230 generated at 03/23/2012 15:45:23 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_1_778694653.log

ORA-00280: change 851230 for thread 1 is in sequence #1

——再执行一次，选择cancel ，在丢失的归档日志前终止recover

SQL> recover database until cancel;

ORA-00279: change 851230 generated at 03/23/2012 15:45:23 needed for thread 1

ORA-00289: suggestion : /disk1/arch/anny/arch_1_1_778694653.log

ORA-00280: change 851230 for thread 1 is in sequence #1

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

cancel

Media recovery cancelled.

查看告警日志：

ALTER DATABASE RECOVER CANCEL

Fri Mar 23 16:35:27 2012

Media Recovery Canceled

Completed: ALTER DATABASE RECOVER CANCEL

Fri Mar 23 16:38:20 2012

alter database open

Fri Mar 23 16:38:20 2012

ORA-1113 signalled during: alter database open...

Fri Mar 23 16:44:17 2012

ALTER DATABASE RECOVER database until cancel

Fri Mar 23 16:44:17 2012

Media Recovery Start

Media Recovery start incarnation depth : 1, target inc# : 8, irscn : 851229

ORA-279 signalled during: ALTER DATABASE RECOVER database until cancel ...

Fri Mar 23 16:44:20 2012