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 - 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