使用Linux文件句柄恢复Oracle数据文件

1. [oracle@zhongwc ~]$ sqlplus / as sysdba

2.

2. SQL*Plus: Release 11.2.0.3.0 Production on Tue Jan 15 11:14:48 2013

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3. Copyright (c) 1982, 2011, Oracle. All rights reserved.

6. 7.

4. Connected to:
5. Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 – 64bit Production
6. With the Partitioning, OLAP, Data Mining and Real Application Testing options

11.

7. SQL> col tablespace_name format a10
8. SQL> col file_name format a50
9. SQL> select open_mode from v$database;

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10. OPEN_MODE
11. ——————–
12. READ WRITE

19.

13. SQL> select file_name,tablespace_name,status from dba_data_files;

21.

14. FILE_NAME TABLESPACE STATUS
15. ————————————————– ———- ———
16. /u01/app/oracle/oradata/ZWC/users01.dbf USERS AVAILABLE
17. /u01/app/oracle/oradata/ZWC/undotbs01.dbf UNDOTBS1 AVAILABLE
18. /u01/app/oracle/oradata/ZWC/sysaux01.dbf SYSAUX AVAILABLE
19. /u01/app/oracle/oradata/ZWC/system01.dbf SYSTEM AVAILABLE
20. /u01/app/oracle/oradata/ZWC/example01.dbf EXAMPLE AVAILABLE

删除普通数据表空间的数据文件[plain]view plaincopyprint?

1. SQL> !rm -r /u01/app/oracle/oradata/ZWC/users01.dbf

2.

2. SQL> !rm -r /u01/app/oracle/oradata/ZWC/example01.dbf

查看文件句柄,发现users01.dbf和example01.dbf状态为delete,切记不要shutdown实例[plain]view plaincopyprint?

1. [oracle@zhongwc ~]$ ps -ef|grep dbw|grep -v grep |awk '{print $2}'
2. 2858
3. [oracle@zhongwc ~]$ ls -l /proc/2858/fd
4. total 0
5. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 0 -> /dev/null
6. l-wx—— 1 oracle oinstall 64 Jan 15 11:20 1 -> /dev/null
7. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 10 -> /dev/zero
8. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 11 -> /dev/zero
9. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 12 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb
10. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 13 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
11. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 14 -> /proc/2858/fd/
12. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 15 -> /dev/zero
13. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 16 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb
14. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 17 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
15. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 18 -> /u01/app/oracle/product/11.2.0/db_1/dbs/lkZWC
16. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 19 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb
17. l-wx—— 1 oracle oinstall 64 Jan 15 11:20 2 -> /dev/null
18. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 20 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb
19. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 256 -> /u01/app/oracle/oradata/ZWC/control01.ctl
20. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 257 -> /u01/app/oracle/fast_recovery_area/ZWC/control02.ctl
21. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 258 -> /u01/app/oracle/oradata/ZWC/system01.dbf
22. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 259 -> /u01/app/oracle/oradata/ZWC/sysaux01.dbf
23. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 260 -> /u01/app/oracle/oradata/ZWC/undotbs01.dbf
24. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 261 -> /u01/app/oracle/oradata/ZWC/users01.dbf (deleted)
25. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 262 -> /u01/app/oracle/oradata/ZWC/example01.dbf (deleted)
26. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 263 -> /u01/app/oracle/oradata/ZWC/temp01.dbf
27. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 3 -> /dev/null
28. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 4 -> /dev/null
29. lrwx—— 1 oracle oinstall 64 Jan 15 11:20 5 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
30. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 6 -> /dev/null
31. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 7 -> /dev/null
32. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 8 -> /dev/null
33. lr-x—— 1 oracle oinstall 64 Jan 15 11:20 9 -> /dev/null

cp到新的位置[plain]view plaincopyprint?

1. [oracle@zhongwc ~]$ cp -p /proc/2858/fd/261 /new_oradata/users01.dbf
2. [oracle@zhongwc ~]$ cp -p /proc/2858/fd/262 /new_oradata/example01.dbf

恢复数据文件[plain]view plaincopyprint?

1. SQL> select file#,status,name from v$datafile;

2.

2. FILE# STATUS NAME
3. ———- ——- ————————————————-
4. 1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
5. 2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
6. 3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
7. 4 ONLINE /u01/app/oracle/oradata/ZWC/users01.dbf
8. 5 ONLINE /u01/app/oracle/oradata/ZWC/example01.dbf

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9. SQL> alter database datafile 4 offline;

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10. Database altered.

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11. SQL> alter database datafile 5 offline;

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12. Database altered.

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13. SQL> select file#,status,name from v$datafile;

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14. FILE# STATUS NAME
15. ———- ——- ————————————————-
16. 1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
17. 2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
18. 3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
19. 4 RECOVER /u01/app/oracle/oradata/ZWC/users01.dbf
20. 5 RECOVER /u01/app/oracle/oradata/ZWC/example01.dbf

28.

21. SQL> alter database rename file '/u01/app/oracle/oradata/ZWC/users01.dbf' to '/new_oradata/users01.dbf';

30.

22. Database altered.

32.

23. SQL> alter database rename file '/u01/app/oracle/oradata/ZWC/example01.dbf' to '/new_oradata/example01.dbf';

34.

24. Database altered.

36.

25. SQL> select file#,status,name from v$datafile;

38.

26. FILE# STATUS NAME
27. ———- ——- ————————————————-
28. 1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
29. 2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
30. 3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
31. 4 RECOVER /new_oradata/users01.dbf
32. 5 RECOVER /new_oradata/example01.dbf

46.

33. SQL> alter datafile datafile 4 online;
34. alter datafile datafile 4 online
35. *
36. ERROR at line 1:
37. ORA-00940: invalid ALTER command

52. 53.

38. SQL> alter database datafile 4 online;
39. alter database datafile 4 online
40. *
41. ERROR at line 1:
42. ORA-01113: file 4 needs media recovery
43. ORA-01110: data file 4: '/new_oradata/users01.dbf'

60. 61.

44. SQL> recover datafile 4;
45. Media recovery complete.
46. SQL> recover datafile 5;
47. Media recovery complete.
48. SQL> alter database datafile 4 online;

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49. Database altered.

69.

50. SQL> alter database datafile 5 online;

71.

51. Database altered.

73.

52. SQL> select file#,status,name from v$datafile;

75.

53. FILE# STATUS NAME
54. ———- ——- ————————————————-
55. 1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
56. 2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
57. 3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
58. 4 ONLINE /new_oradata/users01.dbf
59. 5 ONLINE /new_oradata/example01.dbf

[plain]view plaincopyprint?

60. SQL> create user zhongwc identified by zhongwcpwd default tablespace users;

2.

61. User created.

4.

62. SQL> grant dba to zhongwc;

6.

63. Grant succeeded.

8.

64. SQL> conn zhongwc@zwc
65. Enter password:
66. Connected.
67. SQL> create table t_test tablespace users as select * from dba_objects;

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68. Table created.

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69. SQL> select count(*) from t_test;

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70. COUNT(*)
71. ———-
72. 75203