Oracle移动数据文件不停机和停机两种方式详解

目录

• 11G and before
• 分为不停机和停机两种方式：
• 一、不停机移动数据文件
• 二、停机移动数据文件
• 12C and later

11G and before

分为不停机和停机两种方式：

一、不停机移动数据文件

完整步骤：

1、确认开启归档模式

2、offline数据文件

3、物理层移动数据文件（可重命名）

4、逻辑层rename数据文件路径及名称

5、recover恢复数据文件

6、online数据文件

--开启归档模式
SQL> archive log list
Database log mode              No Archive Mode
Automatic archival             Disabled
Archive destination            /archivelog
Oldest online log sequence     1
Current log sequence           2
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> 
SQL> 
SQL> startup mount
ORACLE instance started.
Total System Global Area 1603411968 bytes
Fixed Size                  2253664 bytes
Variable Size             452988064 bytes
Database Buffers         1140850688 bytes
Redo Buffers                7319552 bytes
Database mounted.
SQL> alter database archivelog;
Database altered.
SQL> alter database open;
Database altered.
--offline数据文件
SQL> /
     FILE# NAME                                                         STATUS
---------- ------------------------------------------------------------ -------
         1 /oradata/orcl11g/system01.dbf                                SYSTEM
         2 /oradata/orcl11g/sysaux01.dbf                                ONLINE
         3 /oradata/orcl11g/undotbs01.dbf                               ONLINE
         4 /oradata/orcl11g/users01.dbf                                 ONLINE
         5 /oradata/orcl11g/example01.dbf                               ONLINE
         6 /oradata/orcl11g/test01.dbf                                  ONLINE
         7 /oradata/ORCL11G/datafile/o1_mf_test_j7jgpq7k_.dbf           ONLINE
7 rows selected.
SQL> alter database datafile 7 offline;
Database altered.
--物理层移动数据文件
SQL> !mv /oradata/ORCL11G/datafile/o1_mf_test_j7jgpq7k_.dbf /oradata/orcl11g/test02.dbf
SQL> !ls /oradata/orcl11g/test02.dbf
/oradata/orcl11g/test02.dbf
--逻辑层rename数据文件
SQL> alter database rename file '/oradata/ORCL11G/datafile/o1_mf_test_j7jgpq7k_.dbf' to '/oradata/orcl11g/test02.dbf';
Database altered.
--恢复数据文件
SQL> recover datafile 7;
Media recovery complete.
--online数据文件
SQL> alter database datafile 7 online;
Database altered.
SQL> select file#,name,status from v$datafile;
     FILE# NAME                                                         STATUS
---------- ------------------------------------------------------------ -------
         1 /oradata/orcl11g/system01.dbf                                SYSTEM
         2 /oradata/orcl11g/sysaux01.dbf                                ONLINE
         3 /oradata/orcl11g/undotbs01.dbf                               ONLINE
         4 /oradata/orcl11g/users01.dbf                                 ONLINE
         5 /oradata/orcl11g/example01.dbf                               ONLINE
         6 /oradata/orcl11g/test01.dbf                                  ONLINE
         7 /oradata/orcl11g/test02.dbf                                  ONLINE
7 rows selected.

二、停机移动数据文件

完整步骤：

1、关闭数据库

2、物理层移动数据文件（可重命名）

3、开启数据库到mount

4、逻辑层rename数据文件路径及名称

5、开启数据库

--创建一个TEST表空间，发现建在了/oradata/ORCL11G/下，希望移动到/oradata/orcl11g/下
SQL> create tablespace TEST;
Tablespace created.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/oradata/orcl11g/system01.dbf
/oradata/orcl11g/sysaux01.dbf
/oradata/orcl11g/undotbs01.dbf
/oradata/orcl11g/users01.dbf
/oradata/orcl11g/example01.dbf
/oradata/ORCL11G/datafile/o1_mf_test_j7jfm30c_.dbf
--尝试在线移动数据文件
SQL> alter database rename file '/oradata/ORCL11G/datafile/o1_mf_test_j7jfm30c_.dbf' to '/oradata/orcl11g/test01.dbf';
alter database rename file '/oradata/ORCL11G/datafile/o1_mf_test_j7jfm30c_.dbf' to '/oradata/orcl11g/test01.dbf'
*
ERROR at line 1:
ORA-01511: error in renaming log/data files
ORA-01121: cannot rename database file 6 - file is in use or recovery
ORA-01110: data file 6: '/oradata/ORCL11G/datafile/o1_mf_test_j7jfm30c_.dbf'
--报错ORA-01121
[oracle@orcl11g:/home/oracle]$ oerr ORA 01121
01121, 00000, "cannot rename database file %s - file is in use or recovery"
// *Cause:  Attempted to use ALTER DATABASE RENAME to rename a
//          datafile that is online in an open instance or is being recovered.
// *Action: Close database in all instances and end all recovery sessions.

明确无法在线移动数据文件，需要关闭数据库。

--操作系统层面移动数据文件，并且重命名
[oracle@orcl11g:/oradata/ORCL11G/datafile]$ ll
total 102408
-rw-r----- 1 oracle oinstall 104865792 Apr 15 20:55 o1_mf_test_j7jfm30c_.dbf
[oracle@orcl11g:/oradata/ORCL11G/datafile]$ mv o1_mf_test_j7jfm30c_.dbf /oradata/orcl11g/
control01.ctl  example01.dbf  redo01.log     redo02.log     redo03.log     sysaux01.dbf   system01.dbf   temp01.dbf     undotbs01.dbf  users01.dbf    
[oracle@orcl11g:/oradata/ORCL11G/datafile]$ mv o1_mf_test_j7jfm30c_.dbf /oradata/orcl11g/test01.dbf
[oracle@orcl11g:/oradata/ORCL11G/datafile]$ ll /oradata/orcl11g/test01.dbf 
--开启数据库到mount
SQL> startup mount
ORACLE instance started.
Total System Global Area 1603411968 bytes
Fixed Size                  2253664 bytes
Variable Size             452988064 bytes
Database Buffers         1140850688 bytes
Redo Buffers                7319552 bytes
Database mounted.
--rename数据文件名称
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/oradata/orcl11g/system01.dbf
/oradata/orcl11g/sysaux01.dbf
/oradata/orcl11g/undotbs01.dbf
/oradata/orcl11g/users01.dbf
/oradata/orcl11g/example01.dbf
/oradata/ORCL11G/datafile/o1_mf_test_j7jfm30c_.dbf
6 rows selected.
SQL> alter database rename file '/oradata/ORCL11G/datafile/o1_mf_test_j7jfm30c_.dbf' to '/oradata/orcl11g/test01.dbf';
Database altered.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/oradata/orcl11g/system01.dbf
/oradata/orcl11g/sysaux01.dbf
/oradata/orcl11g/undotbs01.dbf
/oradata/orcl11g/users01.dbf
/oradata/orcl11g/example01.dbf
/oradata/orcl11g/test01.dbf
6 rows selected.
--开启数据库
SQL> alter database open;
Database altered.

12C and later

支持在线移动数据文件：

可参考：Online Move Datafile in Oracle Database 12c Release 1 (12.1)

语法如下：

ALTER DATABASE MOVE DATAFILE ( 'filename' | 'ASM_filename' | file_number )
 [ TO ( 'filename' | 'ASM_filename' ) ]
 [ REUSE ] [ KEEP ]

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