问题描述:当采用以下步骤删除数据文件后发现v$datafile视图中仍然有该文件记录,且状态recover,意识到该删除步骤有问题,生产环境中存在此种情况,此时作为dba应该怎么办? a、 使用alter database datafile 5 offline; b、rm 命令删掉数据文件 实验目标:模拟该异常,并提供解决方案. 实验环境:oracle 11.2.0.4+ 单实例 1、模拟异常 SQL>alter tablespace users add datafile '/u01/app/oracle/oradata/leodb/users02.dbf'size 10m autoextend on; Tablespacealtered. SQL>select file#,name from v$datafile FILE# NAME ------------------------------------------------------------ 1/u01/app/oracle/oradata/leodb/system01.dbf 2/u01/app/oracle/oradata/leodb/sysaux01.dbf 3/u01/app/oracle/oradata/leodb/undotbs01.dbf 4/u01/app/oracle/oradata/leodb/users01.dbf 5/u01/app/oracle/oradata/leodb/users02.dbf SQL>select d.tablespace_name,v.file#,d.file_name,d.bytes/1024/1024,v.status,v.enabled,d.autoextensible,d.increment_byfrom dba_data_files d,v$datafile v where d.file_id=v.file# TABLESPACE_NAME FILE# FILE_NAME D.BYTES/1024/1024 STATUS ENABLED AUT INCREMENT_BY ------------------------- -------------------------------------------------- ------------------------ ---------- --- ------------ USERS 4/u01/app/oracle/oradata/leodb/users01.dbf 5 ONLINE READ WRITE YES 160 UNDOTBS1 3/u01/app/oracle/oradata/leodb/undotbs01.dbf 70 ONLINE READ WRITE YES 640 SYSAUX 2/u01/app/oracle/oradata/leodb/sysaux01.dbf 490 ONLINE READ WRITE YES 1280 SYSTEM 1/u01/app/oracle/oradata/leodb/system01.dbf 740 SYSTEM READ WRITE YES 1280 USERS 5/u01/app/oracle/oradata/leodb/users02.dbf 10 ONLINE READ WRITE YES 1 现使用错误方法删数据文件users02.dbf SQL>alter database datafile 5 offline; Databasealtered. 现在系统层面删除数据文件users02.dbf [oracle@leoleodb]$ ll total1531236 -rw-r-----1 oracle asmadmin 9748480 Aug 7 13:54 control01.ctl -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:23 redo01.log -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:53 redo02.log -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:23 redo03.log -rw-r-----1 oracle asmadmin 534781952 Aug 7 13:54sysaux01.dbf -rw-r-----1 oracle asmadmin 775954432 Aug 7 13:54system01.dbf -rw-r-----1 oracle asmadmin 30416896 Aug 7 12:33 temp01.dbf -rw-r-----1 oracle asmadmin 73408512 Aug 7 13:54 undotbs01.dbf -rw-r-----1 oracle asmadmin 5251072 Aug 7 13:23 users01.dbf -rw-r-----1 oracle asmadmin 10493952 Aug 7 13:23 users02.dbf [oracle@leoleodb]$ rm -rf users02.dbf [oracle@leoleodb]$ pwd /u01/app/oracle/oradata/leodb 此时通过以下语句查询发现users02.dbf状态为recover,v$datafile中仍然有该数据文件记录,意识到操作错误. SQL> selectd.tablespace_name,v.file#,d.file_name,d.bytes/1024/1024,v.status,v.enabled,d.autoextensible,d.increment_byfrom dba_data_files d,v$datafile v where d.file_id=v.file#; TABLESPACE_NAME FILE# FILE_NAME D.BYTES/1024/1024STATUS ENABLED AUT INCREMENT_BY ------------------------- -------------------------------------------------- ------------------------ ---------- --- ------------ USERS 4/u01/app/oracle/oradata/leodb/users01.dbf 5 ONLINE READ WRITE YES 160 UNDOTBS1 3/u01/app/oracle/oradata/leodb/undotbs01.dbf 70 ONLINE READ WRITE YES 640 SYSAUX 2/u01/app/oracle/oradata/leodb/sysaux01.dbf 510 ONLINE READ WRITE YES 1280 SYSTEM 1/u01/app/oracle/oradata/leodb/system01.dbf 740 SYSTEM READ WRITE YES 1280 USERS 5/u01/app/oracle/oradata/leodb/users02.dbf RECOVERREAD WRITE SQL>select name from v$datafile; NAME -------------------------------------------------- /u01/app/oracle/oradata/leodb/system01.dbf /u01/app/oracle/oradata/leodb/sysaux01.dbf /u01/app/oracle/oradata/leodb/undotbs01.dbf /u01/app/oracle/oradata/leodb/users01.dbf /u01/app/oracle/oradata/leodb/users02.dbf 说明:成功模拟出异常现象. 2、解决方案 a、添加同路径同名数据文件 b、RECOVER并ONLINE该文件 c、用正确方法进行删除 操作过程: SQL>alter database create datafile 5 as '/u01/app/oracle/oradata/leodb/users02.dbf'size 10m; Databasealtered. [oracle@leoleodb]$ ll total1531244 -rw-r-----1 oracle asmadmin 9748480 Aug 7 14:24 control01.ctl -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:23 redo01.log -rw-r-----1 oracle asmadmin 52429312 Aug 7 14:24 redo02.log -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:23 redo03.log -rw-r-----1 oracle asmadmin 534781952 Aug 7 14:24sysaux01.dbf -rw-r-----1 oracle asmadmin 775954432 Aug 7 14:24system01.dbf -rw-r-----1 oracle asmadmin 30416896 Aug 7 14:18 temp01.dbf -rw-r-----1 oracle asmadmin 73408512 Aug 7 14:23 undotbs01.dbf -rw-r-----1 oracle asmadmin 5251072 Aug 7 13:23 users01.dbf -rw-r-----1 oracle asmadmin 10493952 Aug 7 14:24 users02.dbf SQL>recover datafile 5; Mediarecovery complete. SQL>alter database datafile '/u01/app/oracle/oradata/leodb/users02.dbf' online; Databasealtered. SQL>alter tablespace users drop datafile '/u01/app/oracle/oradata/leodb/users02.dbf'; Tablespacealtered. SQL>host ls -l /u01/app/oracle/oradata/leodb/users02.dbf ls:cannot access /u01/app/oracle/oradata/leodb/users02.dbf: No such file ordirectory SQL>selectd.tablespace_name,v.file#,d.file_name,d.bytes/1024/1024,v.status,v.enabled,d.autoextensible,d.increment_byfrom dba_data_files d,v$datafile v where d.file_id=v.file#; TABLESPACE_NAME FILE# FILE_NAME D.BYTES/1024/1024 STATUS ENABLED AUT INCREMENT_BY ------------------------- -------------------------------------------------- ------------------------ ---------- --- ------------ USERS 4/u01/app/oracle/oradata/leodb/users01.dbf 5 ONLINE READ WRITE YES 160 UNDOTBS1 3/u01/app/oracle/oradata/leodb/undotbs01.dbf 70 ONLINE READ WRITE YES 640 SYSAUX 2/u01/app/oracle/oradata/leodb/sysaux01.dbf 510 ONLINE READ WRITE YES 1280 SYSTEM 1/u01/app/oracle/oradata/leodb/system01.dbf 740 SYSTEM READ WRITE YES 1280 [oracle@leoleodb]$ ll total1520996 -rw-r-----1 oracle asmadmin 9748480 Aug 7 14:26 control01.ctl -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:23 redo01.log -rw-r-----1 oracle asmadmin 52429312 Aug 7 14:26 redo02.log -rw-r-----1 oracle asmadmin 52429312 Aug 7 13:23 redo03.log -rw-r-----1 oracle asmadmin 534781952 Aug 7 14:24sysaux01.dbf -rw-r-----1 oracle asmadmin 775954432 Aug 7 14:24system01.dbf -rw-r-----1 oracle asmadmin 30416896 Aug 7 14:18 temp01.dbf -rw-r-----1 oracle asmadmin 73408512 Aug 7 14:23 undotbs01.dbf -rw-r-----1 oracle asmadmin 5251072 Aug 7 13:23 users01.dbf 说明:users02.dbf被成功删除,系统层面及v$datafile中已不存在该文件记录.
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