The document discusses Oracle Managed Files, which allows Oracle to manage datafile, tempfiles, controlfiles, and redo logs by automatically generating filenames and managing file storage. It provides examples of using Oracle Managed Files for creating a database, tablespaces, tempfiles, controlfiles, and adding redo logs. Init parameters like DB_CREATE_FILE_DEST specify the default location for Oracle to create files.

1. Anar Godjaev
Oracle Managed Files
/*Init parameters*/
DB_CREATE_FILE_DEST -- datafilestempfiles
DB_CREATE_ONLINE_LOG_DEST_n -- 1 <= n <= 5 -- redologs and
controlfiles
DB_RECOVERY_FILE_DEST -- archivedlogs, rman backups, flashback
logs
DB_RECOVERY_FILE_DEST_SIZE = 20G
DB_UNIQUE_NAME = <db_name>
<destination_location>/<db_unique_name>/<datafile>/o1_mf_%t_%u_.
dbf
Examples
CREATE DATABASE sample;
-- system and sysauxdatafiles will be 100MB and autoextend on
-- redo log files will be two members 100MB
-- undo file will be 10M with autoextend on if
undo_management=AUTO
CREATE DATABASE sample DATAFILE SIZE 400M
SYSAUX DATAFILE SIZE 200M
DEFAULT TEMPORARY TABLESPACE dflt_ts TEMPFILE SIZE 10M
UNDO TABLESPACE undo_ts DATAFILE SIZE 10M;
CREATE DATABASE sample
DEFAULT TEMPORARY TABLESPACE temp;
/*
* datafiles will have the specified properties
* name of the datafiles will be oracle managed
*/
ALTER SYSTEM SET DB_CREATE_FILE_DEST = '/u01/oradata';
CREATE TABLESPACE tbs_1;
CREATE TABLESPACE tbs_2 DATAFILE SIZE 400M;

2. Anar Godjaev
CREATE TABLESPACE tbs_3 DATAFILE AUTOEXTEND ON MAXSIZE 800M;
CREATE TABLESPACE tbs_4 DATAFILE SIZE 200M SIZE 200M;
CREATE UNDO TABLESPACE undotbs_1;
ALTER TABLESPACE tbs_1 ADD DATAFILE AUTOEXTEND ON MAXSIZE 800M;
CREATE TEMPORARY TABLESPACE temptbs_1;
ALTER TABLESPACE TBS_1 ADD TEMPFILE;
ALTER TABLESPACE tbs_1 ADD DATAFILE;
DROP TABLESPACE tbs_1;
-- Creating Controlfiles
-- NORESETLOGS EXAMPLE
CREATE CONTROLFILE
DATABASE sample
LOGFILE
GROUP 1 ('/u01/oradata/SAMPLE/onlinelog/o1_mf_1_o220rtt9_.log',
'/u02/oradata/SAMPLE/onlinelog/o1_mf_1_v2o0b2i3_.log')
SIZE 100M,
GROUP 2 ('/u01/oradata/SAMPLE/onlinelog/o1_mf_2_p22056iw_.log',
'/u02/oradata/SAMPLE/onlinelog/o1_mf_2_p02rcyg3_.log')
SIZE 100M
NORESETLOGS
DATAFILE
'/u01/oradata/SAMPLE/datafile/o1_mf_system_xu34ybm2_.dbf'
SIZE 100M,
'/u01/oradata/SAMPLE/datafile/o1_mf_sysaux_aawbmz51_.dbf'
SIZE 100M,
'/u01/oradata/SAMPLE/datafile/o1_mf_sys_undotbs_apqbmz51_.dbf'
SIZE 100M
MAXLOGFILES 5
MAXLOGHISTORY 100
MAXDATAFILES 10
MAXINSTANCES 2
ARCHIVELOG;
-- RESETLOGS EXAMPLE
-- Some combination of DB_CREATE_FILE_DEST,
DB_RECOVERY_FILE_DEST, and
-- DB_CREATE_ONLINE_LOG_DEST_n or must be set.

3. Anar Godjaev
CREATE CONTROLFILE
DATABASE sample
RESETLOGS
DATAFILE
'/u01/oradata/SAMPLE/datafile/o1_mf_system_aawbmz51_.dbf',
'/u01/oradata/SAMPLE/datafile/o1_mf_sysaux_axybmz51_.dbf',
'/u01/oradata/SAMPLE/datafile/o1_mf_sys_undotbs_azzbmz51_.dbf'
SIZE 100M
MAXLOGFILES 5
MAXLOGHISTORY 100
MAXDATAFILES 10
MAXINSTANCES 2
ARCHIVELOG;
-- Adding Redo Logs
DB_CREATE_ONLINE_LOG_DEST_1 = '/u01/oradata'
DB_CREATE_ONLINE_LOG_DEST_2 = '/u02/oradata'
ALTER DATABASE ADD LOGFILE;
-- Creating Archived Logs Using Oracle-Managed Files
DB_RECOVERY_FILE_DEST_SIZE = 20G
DB_RECOVERY_FILE_DEST = '/u01/oradata'
LOG_ARCHIVE_DEST_1 = 'LOCATION=USE_DB_RECOVERY_FILE_DEST'