归档模式误删除文件无备份恢复--无数据丢失

----------归档模式误删除数据无备份恢复--------

前提建立表空间以来所有归档日志全部存在

SQL> archive log list;

Database log mode Archive Mode

Automatic archival Enabled

Archive destination /media/standby_redo

Oldest online log sequence 557

Next log sequence to archive 559

Current log sequence 559

SQL> create tablespace test01 datafile '/opt/oracle/oradata/duxiu/test01.dbf' size 50M;

Tablespace created.

SQL> create table test_001 tablespace test01 as select * from scott.emp;

Table created.

SQL> select * from test_001;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO

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

7369 SMITH CLERK 7902 1980/12/17 818 20

7499 ALLEN SALESMAN 7698 1981/02/20 1618 300 30

7521 WARD SALESMAN 7698 1981/02/22 1268 500 30

7566 JONES MANAGER 7839 1981/04/02 2993 20

7654 MARTIN SALESMAN 7698 1981/09/28 1268 1400 30

7698 BLAKE MANAGER 7839 1981/05/01 2868 30

7782 CLARK MANAGER 7839 1981/06/09 2468 10

7839 KING PRESIDENT 1981/11/17 5018 10

7844 TURNER SALESMAN 7698 1981/09/08 1518 0 30

7900 JAMES CLERK 7698 1981/12/03 968 30

7902 FORD ANALYST 7566 1981/12/03 3018 20

7934 MILLER CLERK 7782 1982/01/23 1818 10

12 rows selected.

SQL> alter system switch logfile;

System altered.

SQL> archive log list;

Database log mode Archive Mode

Automatic archival Enabled

Archive destination /media/standby_redo

Oldest online log sequence 558

Next log sequence to archive 560

Current log sequence 560

SQL> update test_001 set sal=1000;

12 rows updated.

SQL> commit;

Commit complete.

SQL> alter system switch logfile;

System altered.

SQL> archive log list;

Database log mode Archive Mode

Automatic archival Enabled

Archive destination /media/standby_redo

Oldest online log sequence 559

Next log sequence to archive 561

Current log sequence 561

SQL> host rm /opt/oracle/oradata/duxiu/test01.dbf

SQL> host ls /opt/oracle/oradata/duxiu/test01.dbf

ls: /opt/oracle/oradata/duxiu/test01.dbf: 没有那个文件或目录

SQL> shutdown abort;

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 285212672 bytes

Fixed Size 1218968 bytes

Variable Size 67110504 bytes

Database Buffers 209715200 bytes

Redo Buffers 7168000 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 5 - see DBWR trace file

ORA-01110: data file 5: '/opt/oracle/oradata/duxiu/test01.dbf'

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

FILE# ERROR

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

5 FILE NOT FOUND

SQL> alter database datafile 5 offline;

Database altered.

SQL> alter database open;

Database altered.

SQL> alter database create datafile '/opt/oracle/oradata/duxiu/test01.dbf' as '/opt/oracle/oradata/duxiu/test01.dbf';

Database altered.

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

FILE# ERROR

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

5

SQL> recover datafile 5;

ORA-00279: change 11835873 generated at 03/19/2013 10:51:30 needed for thread 1

ORA-00289: suggestion : /media/duxiulog/1_559_777229099.dbf

ORA-00280: change 11835873 for thread 1 is in sequence #559

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

auto

Log applied.

Media recovery complete.

SQL> select FILE_NAME,FILE_ID,STATUS from dba_data_files where TABLESPACE_NAME='TEST01';

FILE_NAME FILE_ID STATUS

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

/opt/oracle/oradata/duxiu/test01.dbf 5 AVAILABLE

SQL> select * from test_001;

select * from test_001

*

ERROR at line 1:

ORA-00376: file 5 cannot be read at this time

ORA-01110: data file 5: '/opt/oracle/oradata/duxiu/test01.dbf'

SQL> select TABLESPACE_NAME,STATUS from dba_tablespaces;

TABLESPACE_NAME STATUS

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

SYSTEM ONLINE

UNDOTBS1 ONLINE

SYSAUX ONLINE

TEMP ONLINE

USERS ONLINE

TEST01 ONLINE

6 rows selected.

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

no rows selected

SQL> alter database datafile 5 online;

Database altered.

SQL> select * from test_001;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO

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

7369 SMITH CLERK 7902 1980/12/17 1000 20

7499 ALLEN SALESMAN 7698 1981/02/20 1000 300 30

7521 WARD SALESMAN 7698 1981/02/22 1000 500 30

7566 JONES MANAGER 7839 1981/04/02 1000 20

7654 MARTIN SALESMAN 7698 1981/09/28 1000 1400 30

7698 BLAKE MANAGER 7839 1981/05/01 1000 30

7782 CLARK MANAGER 7839 1981/06/09 1000 10

7839 KING PRESIDENT 1981/11/17 1000 10

7844 TURNER SALESMAN 7698 1981/09/08 1000 0 30

7900 JAMES CLERK 7698 1981/12/03 1000 30

7902 FORD ANALYST 7566 1981/12/03 1000 20

7934 MILLER CLERK 7782 1982/01/23 1000 10

12 rows selected.

SQL>

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

恢复完毕，但是不清楚为什么 mounted之前的 datafile 5 offline

打开之后都是online呢，还要alter database datafile 5 online后才可以使用

ORA-00376错误的一个解释：

Possible causes and solutions summary:

=====================================

A. Tablespace or Datafile offline.

B. Datafile does not exist at the OS level.

C. Datafile locked by Backup Software.

D. Incorrectly set ULIMIT on UNIX.

E. Rollback Segment with active transactions is unavailable

F. Possible Other Causes.

ORA-00376: file 1 cannot be read at this time

系统表空间重建控制文件解决