使用Linux文件句柄恢复Oracle数据文件

使用Linux文件句柄恢复Oracle数据文件

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 - bit 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 Jan 15 11:20 0 -> /dev/null
l-wx------ 1 oracle oinstall Jan 15 11:20 1 -> /dev/null
lr-x------ 1 oracle oinstall Jan 15 11:20 10 -> /dev/zero
lr-x------ 1 oracle oinstall Jan 15 11:20 11 -> /dev/zero
lr-x------ 1 oracle oinstall Jan 15 11:20 12 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb
lrwx------ 1 oracle oinstall Jan 15 11:20 13 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
lr-x------ 1 oracle oinstall Jan 15 11:20 14 -> /proc/2858/fd/
lr-x------ 1 oracle oinstall Jan 15 11:20 15 -> /dev/zero
lr-x------ 1 oracle oinstall Jan 15 11:20 16 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb
lrwx------ 1 oracle oinstall Jan 15 11:20 17 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
lrwx------ 1 oracle oinstall Jan 15 11:20 18 -> /u01/app/oracle/product/11.2.0/db_1/dbs/lkZWC
lr-x------ 1 oracle oinstall Jan 15 11:20 19 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb
l-wx------ 1 oracle oinstall Jan 15 11:20 2 -> /dev/null
lr-x------ 1 oracle oinstall Jan 15 11:20 20 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb
lrwx------ 1 oracle oinstall Jan 15 11:20 256 -> /u01/app/oracle/oradata/ZWC/control01.ctl
lrwx------ 1 oracle oinstall Jan 15 11:20 257 -> /u01/app/oracle/fast_recovery_area/ZWC/control02.ctl
lrwx------ 1 oracle oinstall Jan 15 11:20 258 -> /u01/app/oracle/oradata/ZWC/system01.dbf
lrwx------ 1 oracle oinstall Jan 15 11:20 259 -> /u01/app/oracle/oradata/ZWC/sysaux01.dbf
lrwx------ 1 oracle oinstall Jan 15 11:20 260 -> /u01/app/oracle/oradata/ZWC/undotbs01.dbf
lrwx------ 1 oracle oinstall Jan 15 11:20 261 -> /u01/app/oracle/oradata/ZWC/users01.dbf (deleted)
lrwx------ 1 oracle oinstall Jan 15 11:20 262 -> /u01/app/oracle/oradata/ZWC/example01.dbf (deleted)
lrwx------ 1 oracle oinstall Jan 15 11:20 263 -> /u01/app/oracle/oradata/ZWC/temp01.dbf
lr-x------ 1 oracle oinstall Jan 15 11:20 3 -> /dev/null
lr-x------ 1 oracle oinstall Jan 15 11:20 4 -> /dev/null
lrwx------ 1 oracle oinstall Jan 15 11:20 5 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_ZWC.dat
lr-x------ 1 oracle oinstall Jan 15 11:20 6 -> /dev/null
lr-x------ 1 oracle oinstall Jan 15 11:20 7 -> /dev/null
lr-x------ 1 oracle oinstall Jan 15 11:20 8 -> /dev/null
lr-x------ 1 oracle oinstall Jan 15 11:20 9 -> /dev/null