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how-to-relocate-files-in-oracle.md

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How to relocate files in Oracle

Control files

  1. Check the current location of the control files:
SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/control01.ctl
/u01/app/oracle/oradata/orcl/control02.ctl

SQL> show parameter control_files

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
control_files                        string
/u01/app/oracle/oradata/orcl/c
ontrol01.ctl, /u01/app/oracle/
oradata/orcl/control02.ctl
  1. Alter the control_files parameter:
SQL> alter system set control_files='/home/mijin/test_data/control01.ctl','/home/mijin/test_data/control02.ctl' scope=spfile;

System altered.
  1. Shutdown the database:
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
  1. Relocate or move the physical control files:
$ cd /u01/app/oracle/oradata/orcl
$ mv control* /home/mijin/test_data/
  1. Start the database:
SQL> startup
ORACLE instance started.

Total System Global Area 1.0133E+10 bytes
Fixed Size                 12170088 bytes
Variable Size            3858762904 bytes
Database Buffers         6241124352 bytes
Redo Buffers               21381120 bytes
Database mounted.
Database opened.
  1. Check the current location of the control files:
SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/home/mijin/test_data/control01.ctl
/home/mijin/test_data/control02.ctl

Log files

  1. Check the current location of the log files:
SQL> SELECT member FROM v$logfile;

MEMBER
--------------------------------------------------------------------------------
/u01/app/oracle/oradata/orcl/redo03.log
/u01/app/oracle/oradata/orcl/redo02.log
/u01/app/oracle/oradata/orcl/redo01.log
  1. Shutdown the database:
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
  1. Relocate or move the physical log files:
$ cd /u01/app/oracle/oradata/orcl
$ mv redo* /home/mijin/test_data/
  1. Start the database in mount mode:
SQL> startup mount
ORACLE instance started.

Total System Global Area 1.0133E+10 bytes
Fixed Size                 12170088 bytes
Variable Size            3858762904 bytes
Database Buffers         6241124352 bytes
Redo Buffers               21381120 bytes
Database mounted.
  1. Rename the the file within the Oracle dictionary:
SQL> alter database rename file '/u01/app/oracle/oradata/orcl/redo01.log' to '/home/mijin/test_data/redo01.log';
SQL> alter database rename file '/u01/app/oracle/oradata/orcl/redo02.log' to '/home/mijin/test_data/redo02.log';
SQL> alter database rename file '/u01/app/oracle/oradata/orcl/redo03.log' to '/home/mijin/test_data/redo03.log';
  1. Open the database:
SQL> alter database open;

Database altered.
  1. Check the current location of the log files:
SQL> SELECT member FROM v$logfile;

MEMBER
--------------------------------------------------------------------------------
/home/mijin/test_data/redo03.log
/home/mijin/test_data/redo02.log
/home/mijin/test_data/redo01.log

Data files

  1. Check the current location of the data files:
SQL> select tablespace_name,file_name from dba_data_files;

TABLESPACE_NAME
------------------------------------------------------------
FILE_NAME
--------------------------------------------------------------------------------
SYSTEM
/u01/app/oracle/oradata/orcl/system01.dbf
...
  1. Shutdown the database:
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
  1. Relocate or move the physical log files:
$ cd /u01/app/oracle/oradata/orcl
$ mv system01.dbf /home/mijin/test_data/system01.dbf
  1. Start the database in mount mode:
SQL> startup mount
ORACLE instance started.

Total System Global Area 1.0133E+10 bytes
Fixed Size                 12170088 bytes
Variable Size            3858762904 bytes
Database Buffers         6241124352 bytes
Redo Buffers               21381120 bytes
Database mounted.
  1. Rename the the file within the Oracle dictionary:
SQL> alter database rename file '/u01/app/oracle/oradata/orcl/system01.dbf' to '/home/mijin/test_data/system01.dbf';
  1. Open the database:
SQL> alter database open;

Database altered.
  1. Check the current location of the log files:
SQL> select tablespace_name,file_name from dba_data_files;

TABLESPACE_NAME
------------------------------------------------------------
FILE_NAME
--------------------------------------------------------------------------------
SYSTEM
/home/mijin/test_data/system01.dbf
...