Oracle Managed Files
Download as DOCX, PDF1 like795 views
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.
Oracle Managed 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'