使用Linux文件句柄恢复Oracle数据文件
查看当前数据文件
[oracle@zhongwc ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.3.0 Production on Tue Jan 15 11:14:48 2013 Copyright (c) 1982, 2011, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> col tablespace_name format a10 SQL> col file_name format a50 SQL> select open_mode from v$database; OPEN_MODE -------------------- READ WRITE SQL> select file_name,tablespace_name,status from dba_data_files; FILE_NAME TABLESPACE STATUS -------------------------------------------------- ---------- --------- /u01/app/oracle/oradata/ZWC/users01.dbf USERS AVAILABLE /u01/app/oracle/oradata/ZWC/undotbs01.dbf UNDOTBS1 AVAILABLE /u01/app/oracle/oradata/ZWC/sysaux01.dbf SYSAUX AVAILABLE /u01/app/oracle/oradata/ZWC/system01.dbf SYSTEM AVAILABLE /u01/app/oracle/oradata/ZWC/example01.dbf EXAMPLE AVAILABLE
删除普通数据表空间的数据文件
SQL> !rm -r /u01/app/oracle/oradata/ZWC/users01.dbf SQL> !rm -r /u01/app/oracle/oradata/ZWC/example01.dbf
查看文件句柄,发现users01.dbf和example01.dbf状态为delete,切记不要shutdown实例
[oracle@zhongwc ~]$ ps -ef|grep dbw|grep -v grep |awk '{print $2}'
2858
[oracle@zhongwc ~]$ ls -l /proc/2858/fd
total 0
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 0 -> /dev/null
l-wx------ 1 oracle oinstall 64 Jan 15 11:20 1 -> /dev/null
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 10 -> /dev/zero
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 11 -> /dev/zero
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 12 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 13 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 14 -> /proc/2858/fd/
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 15 -> /dev/zero
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 16 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 17 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 18 -> /u01/app/oracle/product/11.2.0/db_1/dbs/lkZWC
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 19 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb
l-wx------ 1 oracle oinstall 64 Jan 15 11:20 2 -> /dev/null
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 20 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 256 -> /u01/app/oracle/oradata/ZWC/control01.ctl
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 257 -> /u01/app/oracle/fast_recovery_area/ZWC/control02.ctl
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 258 -> /u01/app/oracle/oradata/ZWC/system01.dbf
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 259 -> /u01/app/oracle/oradata/ZWC/sysaux01.dbf
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 260 -> /u01/app/oracle/oradata/ZWC/undotbs01.dbf
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 261 -> /u01/app/oracle/oradata/ZWC/users01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 262 -> /u01/app/oracle/oradata/ZWC/example01.dbf (deleted)
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 263 -> /u01/app/oracle/oradata/ZWC/temp01.dbf
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 3 -> /dev/null
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 4 -> /dev/null
lrwx------ 1 oracle oinstall 64 Jan 15 11:20 5 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 6 -> /dev/null
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 7 -> /dev/null
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 8 -> /dev/null
lr-x------ 1 oracle oinstall 64 Jan 15 11:20 9 -> /dev/null
cp到新的位置
[oracle@zhongwc ~]$ cp -p /proc/2858/fd/261 /new_oradata/users01.dbf [oracle@zhongwc ~]$ cp -p /proc/2858/fd/262 /new_oradata/example01.dbf
恢复数据文件
SQL> select file#,status,name from v$datafile;
FILE# STATUS NAME
---------- ------- -------------------------------------------------
1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
4 ONLINE /u01/app/oracle/oradata/ZWC/users01.dbf
5 ONLINE /u01/app/oracle/oradata/ZWC/example01.dbf
SQL> alter database datafile 4 offline;
Database altered.
SQL> alter database datafile 5 offline;
Database altered.
SQL> select file#,status,name from v$datafile;
FILE# STATUS NAME
---------- ------- -------------------------------------------------
1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
4 RECOVER /u01/app/oracle/oradata/ZWC/users01.dbf
5 RECOVER /u01/app/oracle/oradata/ZWC/example01.dbf
SQL> alter database rename file '/u01/app/oracle/oradata/ZWC/users01.dbf' to '/new_oradata/users01.dbf';
Database altered.
SQL> alter database rename file '/u01/app/oracle/oradata/ZWC/example01.dbf' to '/new_oradata/example01.dbf';
Database altered.
SQL> select file#,status,name from v$datafile;
FILE# STATUS NAME
---------- ------- -------------------------------------------------
1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
4 RECOVER /new_oradata/users01.dbf
5 RECOVER /new_oradata/example01.dbf
SQL> alter datafile datafile 4 online;
alter datafile datafile 4 online
*
ERROR at line 1:
ORA-00940: invalid ALTER command
SQL> alter database datafile 4 online;
alter database datafile 4 online
*
ERROR at line 1:
ORA-01113: file 4 needs media recovery
ORA-01110: data file 4: '/new_oradata/users01.dbf'
SQL> recover datafile 4;
Media recovery complete.
SQL> recover datafile 5;
Media recovery complete.
SQL> alter database datafile 4 online;
Database altered.
SQL> alter database datafile 5 online;
Database altered.
SQL> select file#,status,name from v$datafile;
FILE# STATUS NAME
---------- ------- -------------------------------------------------
1 SYSTEM /u01/app/oracle/oradata/ZWC/system01.dbf
2 ONLINE /u01/app/oracle/oradata/ZWC/sysaux01.dbf
3 ONLINE /u01/app/oracle/oradata/ZWC/undotbs01.dbf
4 ONLINE /new_oradata/users01.dbf
5 ONLINE /new_oradata/example01.dbf
SQL> create user zhongwc identified by zhongwcpwd default tablespace users;
User created.
SQL> grant dba to zhongwc;
Grant succeeded.
SQL> conn zhongwc@zwc
Enter password:
Connected.
SQL> create table t_test tablespace users as select * from dba_objects;
Table created.
SQL> select count(*) from t_test;
COUNT(*)
----------
75203