RMAN can be used to relocate a datafile.
I start with the datafile present in /home/oracle/app/oracle/oradata/orcl/
I start with the datafile present in /home/oracle/app/oracle/oradata/orcl/
SQL> select tablespace_name, file_id, file_name 2 from dba_data_files 3 where file_name like '%add%'; TABLESPACE_NAME FILE_ID ------------------------------ ---------- FILE_NAME -------------------------------------------------------------------------------- ADD_TBS 14 /home/oracle/app/oracle/oradata/orcl/add_tbs.dbf SQL>I would now like to relocate this to /oradata/orcl. I use RMAN thus :
RMAN> sql 'alter tablespace add_tbs offline'; using target database control file instead of recovery catalog sql statement: alter tablespace add_tbs offline RMAN> RMAN> copy datafile 14 to '/oradata/orcl/add_tbs_01.dbf'; Starting backup at 24-MAR-12 using channel ORA_DISK_1 channel ORA_DISK_1: starting datafile copy input datafile file number=00014 name=/home/oracle/app/oracle/oradata/orcl/add_tbs.dbf output file name=/oradata/orcl/add_tbs_01.dbf tag=TAG20120324T001024 RECID=3 STAMP=778723826 channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03 Finished backup at 24-MAR-12 RMAN> RMAN> switch datafile 14 to copy; datafile 14 switched to datafile copy "/oradata/orcl/add_tbs_01.dbf" RMAN> recover tablespace add_tbs; Starting recover at 24-MAR-12 using channel ORA_DISK_1 starting media recovery media recovery complete, elapsed time: 00:00:00 Finished recover at 24-MAR-12 RMAN> sql 'alter tablespace add_tbs online'; sql statement: alter tablespace add_tbs online RMAN>That was easy -- so far.
Now ... the question is : If I do a LIST BACKUP, what appears as the location of the datafile ? Is it /home/oacle/app/oracle/oradata/orcl ? OR is it /oradata/orcl ?
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Let's see ...........
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RMAN> list backup of datafile 14;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
8 Full 487.60M DISK 00:01:12 01-JAN-12
BP Key: 8 Status: AVAILABLE Compressed: YES Tag: TAG20120101T112516
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_01_01/o1_mf_nnndf_TAG20120101T112516_7hznjx24_.bkp
List of Datafiles in backup set 8
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 4956816 01-JAN-12 /oradata/orcl/add_tbs_01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
18 Full 530.30M DISK 00:01:44 23-MAR-12
BP Key: 18 Status: AVAILABLE Compressed: YES Tag: TAG20120323T231454
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_03_23/o1_mf_nnndf_TAG20120323T231454_7ps4vgmf_.bkp
List of Datafiles in backup set 18
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 5192430 23-MAR-12 /oradata/orcl/add_tbs_01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
21 Full 530.70M DISK 00:01:23 23-MAR-12
BP Key: 21 Status: AVAILABLE Compressed: YES Tag: TAG20120323T235528
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_03_23/o1_mf_nnndf_TAG20120323T235528_7ps77jf2_.bkp
List of Datafiles in backup set 21
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 5194695 23-MAR-12 /oradata/orcl/add_tbs_01.dbf
RMAN>
Apparently, Oracle now shows the *new* location of the datafile even for backups taken earlier !! How cool is that ?!
If I take a fresh backup ...
RMAN> backup datafile 14;
Starting backup at 24-MAR-12
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00014 name=/oradata/orcl/add_tbs_01.dbf
channel ORA_DISK_1: starting piece 1 at 24-MAR-12
channel ORA_DISK_1: finished piece 1 at 24-MAR-12
piece handle=/home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_03_24/o1_mf_nnndf_TAG20120324T001527_7ps8dzm8_.bkp tag=TAG20120324T001527 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 24-MAR-12
RMAN> list backup of datafile 14;
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
8 Full 487.60M DISK 00:01:12 01-JAN-12
BP Key: 8 Status: AVAILABLE Compressed: YES Tag: TAG20120101T112516
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_01_01/o1_mf_nnndf_TAG20120101T112516_7hznjx24_.bkp
List of Datafiles in backup set 8
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 4956816 01-JAN-12 /oradata/orcl/add_tbs_01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
18 Full 530.30M DISK 00:01:44 23-MAR-12
BP Key: 18 Status: AVAILABLE Compressed: YES Tag: TAG20120323T231454
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_03_23/o1_mf_nnndf_TAG20120323T231454_7ps4vgmf_.bkp
List of Datafiles in backup set 18
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 5192430 23-MAR-12 /oradata/orcl/add_tbs_01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
21 Full 530.70M DISK 00:01:23 23-MAR-12
BP Key: 21 Status: AVAILABLE Compressed: YES Tag: TAG20120323T235528
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_03_23/o1_mf_nnndf_TAG20120323T235528_7ps77jf2_.bkp
List of Datafiles in backup set 21
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 5194695 23-MAR-12 /oradata/orcl/add_tbs_01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
24 Full 1.23M DISK 00:00:00 24-MAR-12
BP Key: 24 Status: AVAILABLE Compressed: NO Tag: TAG20120324T001527
Piece Name: /home/oracle/app/oracle/flash_recovery_area/ORCL/backupset/2012_03_24/o1_mf_nnndf_TAG20120324T001527_7ps8dzm8_.bkp
List of Datafiles in backup set 24
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
14 Full 5196666 24-MAR-12 /oradata/orcl/add_tbs_01.dbf
RMAN>
Yes,
BackupSet Key 24 has the latest backup, created today.Today's question :
What is the information that Oracle stores ? If the location of datafile 14 was under /home/oracle/app/oracle/oradata/orcl on 01-Jan and 23-Mar, why isn't that location presented ?Is it not stored in the repository ? Yes, the location of the BackupPiece is evident, but the location of the datafile is "current" even when the backup was taken when the datafile was elsewhere !
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7 comments:
Hemant,
(Again) I don't have answer to your question but I am wondering if recovery catalog (instead of control file) is used when the backup was taken and when the LIST BACKUP is issued, will it show the old location of datafile?
Hi Hemant,
In case of a seperate recovery catalog also, it shows the new location.
-- get the current layout of the database
RMAN> report schema at time "to_date('26-MAR-2012 11:24:23','DD-MON-YYYY HH24:MI:SS')";
Report of database schema for database with db_unique_name ORA11PRD
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 700 SYSTEM YES C:\APP\WXYZ\ORADATA\ORA11PRD\SYSTEM01.DBF
2 600 SYSAUX YES C:\APP\WXYZ\ORADATA\ORA11PRD\SYSAUX01.DBF
3 300 UNDOTBS1 YES C:\APP\WXYZ\ORADATA\ORA11PRD\UNDOTBS01.DBF
4 32 USERS YES C:\APP\WXYZ\ORADATA\ORA11PRD\USERS01.DBF
5 100 TEST_TS YES C:\APP\WXYZ\ORADATA\ORA11PRD\TEST.DBF
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 20 TEMP 32767 C:\APP\WXYZ\ORADATA\ORA11PRD\TEMP01.DBF
-- move the datafile 5 to a new location
RMAN> copy datafile 5 to 'c:\temp\TEST.DBF';
Starting backup at 26-MAR-12
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00005 name=C:\APP\WXYZ\ORADATA\ORA11PRD\TEST.DBF
output file name=C:\TEMP\TEST.DBF tag=TAG20120326T112737 RECID=3 STAMP=778937267
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:15
Finished backup at 26-MAR-12
RMAN> switch datafile 5 to copy;
datafile 5 switched to datafile copy "C:\TEMP\TEST.DBF"
starting full resync of recovery catalog
full resync complete
RMAN> sql "alter tablespace test_ts online";
sql statement: alter tablespace test_ts online
starting full resync of recovery catalog
full resync complete
-- check the past layout of the database
RMAN> report schema at time "to_date('26-MAR-2012 11:24:23','DD-MON-YYYY HH24:MI:SS')";
Report of database schema for database with db_unique_name ORA11PRD
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 700 SYSTEM YES C:\APP\WXYZ\ORADATA\ORA11PRD\SYSTEM01.DBF
2 600 SYSAUX YES C:\APP\WXYZ\ORADATA\ORA11PRD\SYSAUX01.DBF
3 300 UNDOTBS1 YES C:\APP\WXYZ\ORADATA\ORA11PRD\UNDOTBS01.DBF
4 32 USERS YES C:\APP\WXYZ\ORADATA\ORA11PRD\USERS01.DBF
5 100 TEST_TS YES C:\TEMP\TEST.DBF <--------------------------- new location of the file
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 20 TEMP 32767 C:\APP\WXYZ\ORADATA\ORA11PRD\TEMP01.DBF
Regards,
Vaibhav
Narendra,
Vaibhav has provided demonstration.
Vaibhav,
Thank you !
Hi sir
As usual this another very good post . I have few doubt from the above post .Kindly explain..
1.) What is the information that Oracle stores in the controlfile(i.e, rman repository) related to backup .
From the above post , i assume something like that rman repository contains the the backup peice location and the datafile id not the location of the datafiles. It pickups the location from the datafile id values.
Please correct me ....
Neeraj
Neeraj,
The Backup and Recovery Reference documents the Recovery Catalog views (those beginning with RC_%).
However, the database Reference documents the V$ views (those beginning with V$BACKUP_%) that are views on information in the *control file*.
When you do a RESYNC CATALOG (and this is done automatically when Oracle detects structural changes to the database), Oracle copies information *from the controlfile to the RMAN catalog schema*. The controlfile for the database is still and always the *master*.
nice xplantion.i have one doubt about rman configuration.i configured all rman setting in /rmanbkp location.but some backuppieces are stored in $ORACLE_HOME/dbs location.any idea
Hari,
Do a SHOW ALL in RMAN to document what you have configured. Generally, backup locations are configured via scripts with the FORMAT clause of the BACKUP command. Without that, the default location is DB_RECOVER_FILE_DEST (i.e. the FRA) or $ORACLE_HOME/dbs. Note that $ORACLE_HOME/dbs is the default location for a backupset for which you haven't specified a FORMAT.
Hemant
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