ASM RMAN backup to File System

Question

Hi all,
I have a rman backup (datafile and controlfile) which was took in an ASM instance (not a RAC) ORACLE 11.2.0.2 in a Linux server, now I want restore the backup in a new database in windows/Linux OS using general File System storage (single instance rdbms) instead of ASM.
Is this possible?
Can I restrore an ASM rman backup in a file system storage mechanisim in a new server?
Kindly clarify my question.
Thanks in Advance..
Nonuday

Answer 1

Nonuday wrote:
Hi Levi,
Thanks for your invaluable script and blog.
can you clarify me on this query:
I have a RMAN backup taken from ASM and the backup is database and controlf file backup which contains datafiles and controlfiles.
Now I need to restore this on my system and here I dont use ASM or archive log, I use single instance in no archive log mode database.
I have restored the control file from the RMAN controfile backup.
Before restoring the control file I have checked the orginal pfile of the backup database which had parameters like
'db_create_file_dest',
'db_create_online_log_dest',
'db_recovery_file_dest_size',
'db_recovery_dest',
'log_archive_dest'.
Since I am not gng to create a DB in no archive log mode, I didnt use any of the above parameters and created a database.
Now my question is:
If i restore the database and the datafile will get restored and after renaming all the logfiles, database will be opened.
I want to know whether this method is correct or wrong and will the database work as it was working previously. Or do i need create the db_file_recovery and other parameters also for this database.About Parameter:
All these parameters should reflect your current environment any reference to the old environment must be modified.
About Filesystem used:
Does not matter what Filesystem you are using the File (datafile/redolog/controlfile/archivelog/backuppiece) are created on Binary Format which depend on Platform only. So, The same binary file ( e.g datafile) have same format and content on raw device, ASM, ext3, ext2, and so on. So, to database it's only a location where file are stored, but the file are the same. ASM has a different architecture from Regular Filesystem and need be managed in a different manner (i.e using RMAN).
About Database:
Since your database files are the same even using different filesystem what you need is rename your datafiles/redofiles on controlfile during restore, the redo files will be recreated.
So, does not matter if you database are noarchivelog or archivelog, the same way which you will do a restore on ASM is the same way to restore on Regular Filesystem. (it's only about renaming database file on controlfile during restore)
On blog the post "How Migrate All Files on ASM to Non-ASM (Unix/Linux)" is about move the file from filesystem to another. But you can modify the script used to restore purposes;
## set newname tell to RMAN where file will be restored and keep this files location on memory buffer
RMAN> set newname for datafile 1 to <location>;
### swich get list of files from memory buffer (rman) and rename on controlfile the files already restored.
RMAN>switch datafile/tempfile all ;With database mounted use this script below:
I just commented three lines that are unnecessary in your case.
SET serveroutput ON;
DECLARE
  vcount  NUMBER:=0;
  vfname VARCHAR2(1024);
  CURSOR df
  IS
    SELECT file#,
      rtrim(REPLACE(name,'+DG_DATA/drop/datafile/','/u01/app/oracle/oradata/drop/'),'.0123456789') AS name
    FROM v$datafile;
  CURSOR tp
  IS
    SELECT file#,
      rtrim(REPLACE(name,'+DG_DATA/drop/tempfile/','/u01/app/oracle/oradata/drop/'),'.0123456789') AS name
    FROM v$tempfile;
BEGIN
--  dbms_output.put_line('CONFIGURE CONTROLFILE AUTOBACKUP ON;'); ### commented
  FOR dfrec IN df
  LOOP
    IF dfrec.name  != vfname THEN
      vcount      :=1;
      vfname     := dfrec.name;
    ELSE
      vcount := vcount+1;
      vfname:= dfrec.name;
    END IF;
  --  dbms_output.put_line('backup as copy datafile ' || dfrec.file# ||' format  "'||dfrec.name ||vcount||'.dbf";');  ### commented
  END LOOP;
  dbms_output.put_line('run');
  dbms_output.put_line('{');
  FOR dfrec IN df
  LOOP
    IF dfrec.name  != vfname THEN
      vcount      :=1;
      vfname     := dfrec.name;
    ELSE
      vcount := vcount+1;
      vfname:= dfrec.name;
    END IF;
    dbms_output.put_line('set newname for datafile ' || dfrec.file# ||'  to  '''||dfrec.name ||vcount||'.dbf'' ;');
  END LOOP;
  FOR tprec IN tp
  LOOP
    IF tprec.name  !=  vfname THEN
      vcount      :=1;
      vfname     := tprec.name;
    ELSE
      vcount := vcount+1;
      vfname:= tprec.name;
    END IF;
    dbms_output.put_line('set newname for tempfile ' || tprec.file# ||'  to  '''||tprec.name ||vcount||'.dbf'' ;');
    END LOOP;
      dbms_output.put_line('restore database;');
    dbms_output.put_line('switch tempfile all;');
    dbms_output.put_line('switch datafile all;');
    dbms_output.put_line('recover database;');
    dbms_output.put_line('}');
---   dbms_output.put_line('alter database open;');  ### comented because you need rename your redologs on controlfile before open database
    dbms_output.put_line('exit');
END;
/After restore you must rename your redologs on controlfile from old location to new location:
e.g
##  use this query to get current location of redolog
SQL>  select group#,member from v$logfile order by 1;
## and change from <old_location> to <new_location>
SQL > ALTER DATABASE
  RENAME FILE '+DG_TSM_DATA/tsm/onlinelog/group_3.263.720532229' 
           TO  '/u01/app/oracle/oradata/logs/log3a.rdo'  When you change all redolog on controlfile issue command below:
SQL> alter database open resetlogs;PS: Always track database in real time using alert log file of database.
HTH,
Levi Pereira