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Thursday, April 17, 2008

Migrating Databases From NON-ASM to ASM

1. First need to set below parameter for controlfile,datafile or FRA.

NOTE: I have two disk group here i am using "DGRP2" disk group.

SQL> alter system set control_files='+DGRP2' scope=spfile;
System altered.
SQL> alter system set db_create_file_dest='+DGRP2' scope=spfile;
System altered.
SQL> alter system set db_recovery_file_dest='+DGRP2' scope=spfile;
System altered.

2. Create New controlfile , datafile or spfile in ASM diskgroup.

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup nomount

ORACLE instance started.
Total System Global Area 263639040 bytes

Fixed Size 1332552 bytes

Variable Size 218106552 bytes

Database Buffers 37748736 bytes

Redo Buffers 6451200 bytes

Connect with RMAN session.

C:\>RMAN target=sys
Recovery Manager: Release 11.1.0.6.0 - Production on Thu Apr 17 10:12:53 2008
Copyright (c) 1982, 2007, Oracle. All rights reserved.
target database Password:connected to target database: TEST (not mounted)

Restore Controlfile.

RMAN> restore controlfile from 'C:\app\m.taj\oradata\test\CONTROL01.ctl';
Starting restore at 17-APR-08using target database control file instead of recovery catalogallocated channel: ORA_DISK_1channel ORA_DISK_1: SID=151 device type=DISK
channel ORA_DISK_1: copied control file copyoutput file name=+DGRP2/test/controlfile/current.256.652270419Finished restore at 17-APR-08

RMAN> alter database mount;
database mountedreleased channel: ORA_DISK_1

Take backup of database which we use for ASM diskgroup.

RMAN> backup as copy database format '+DGRP2';


Starting backup at 17-APR-08allocated channel: ORA_DISK_1channel ORA_DISK_1: SID=151 device type=DISKchannel ORA_DISK_1: starting datafile copyinput datafile file number=00001 name=C:\APP\M.TAJ\ORADATA\TEST\SYSTEM01.DBFoutput file name=+DGRP2/test/datafile/system.257.652270565 tag=TAG20080417T101550 RECID=1 STAMP=652270748channel ORA_DISK_1: datafile copy complete, elapsed time: 00:03:06channel ORA_DISK_1: starting datafile copyinput datafile file number=00002 name=C:\APP\M.TAJ\ORADATA\TEST\SYSAUX01.DBFoutput file name=+DGRP2/test/datafile/sysaux.258.652270761 tag=TAG20080417T101550 RECID=2 STAMP=652270908channel ORA_DISK_1: datafile copy complete, elapsed time: 00:02:35channel ORA_DISK_1: starting datafile copyinput datafile file number=00003 name=C:\APP\M.TAJ\ORADATA\TEST\UNDOTBS01.DBFoutput file name=+DGRP2/test/datafile/undotbs1.259.652270927 tag=TAG20080417T101550 RECID=3 STAMP=652270952channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:35channel ORA_DISK_1: starting datafile copycopying current control fileoutput file name=+DGRP2/test/controlfile/backup.260.652270971 tag=TAG20080417T101550 RECID=4 STAMP=652270975channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07channel ORA_DISK_1: starting datafile copyinput datafile file number=00004 name=C:\APP\M.TAJ\ORADATA\TEST\USERS01.DBFoutput file name=+DGRP2/test/datafile/users.261.652270989 tag=TAG20080417T101550 RECID=5 STAMP=652270991channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03channel ORA_DISK_1: starting full datafile backup setchannel ORA_DISK_1: specifying datafile(s) in backup setincluding current SPFILE in backup setchannel ORA_DISK_1: starting piece 1 at 17-APR-08channel ORA_DISK_1: finished piece 1 at 17-APR-08piece handle=+DGRP2/test/backupset/2008_04_17/nnsnf0_tag20080417t101550_0.262.652271003 tag=TAG20080417T101550 comment=NONEchannel ORA_DISK_1: backup set complete, elapsed time: 00:00:02Finished backup at 17-APR-08

RMAN> switch database to copy;

datafile 1 switched to datafile copy "+DGRP2/test/datafile/system.257.652270565"
datafile 2 switched to datafile copy "+DGRP2/test/datafile/sysaux.258.652270761"
datafile 3 switched to datafile copy "+DGRP2/test/datafile/undotbs1.259.652270927"
datafile 4 switched to datafile copy "+DGRP2/test/datafile/users.261.652270989"

Again connect to sqlplus session and perform incomplete recovery

C:\>sqlplus sys/oracle as sysdba
SQL*Plus: Release 11.1.0.6.0 - Production on Thu Apr 17 10:26:24 2008
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Connected to:Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - ProductionWith the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> recover database using backup controlfile until cancel;

ORA-00279: change 1071679 generated at 04/17/2008 10:11:10 needed for thread 1ORA-00289: suggestion : +DGRP2ORA-15173: entry 'ARCHIVELOG' does not exist in directory 'TEST'ORA-00280: change 1071679 for thread 1 is in sequence #14
Specify log: {=suggested filename AUTO CANCEL}

CANCEL

Media recovery cancelled.

OPEN database with RESETLOGS option.

SQL> alter database open resetlogs;
Database altered.

4. Drop old tempfile and create new tempfile in existing temp tablespace

SQL> alter database tempfile 'c:\app\m.taj\oradata\test\temp01.dbf' 2 drop including datafiles;
Database altered.


SQL> alter tablespace temp add tempfile size 512m 2 autoextend on next 250m maxsize unlimited;
Tablespace altered.

SQL> select tablespace_name, file_name, bytes from dba_temp_files;
TABLESPACE_NAME FILE_NAME BYTES------------------------------ ------------------------------ ----------TEMP +DGRP2/test/tempfile/temp.266. 536870912 652271571

5. Recreate All redolog group on ASM diskgroup

SQL> select a.group#, a.member, b.bytes

2 from v$logfile a, v$log b where a.group# = b.group#;

GROUP# MEMBER BYTES

---------- ------------------------------------ ---------

3 C:\APP\M.TAJ\ORADATA\TEST\REDO03.LOG 52428800
2 C:\APP\M.TAJ\ORADATA\TEST\REDO02.LOG 52428800
1 C:\APP\M.TAJ\ORADATA\TEST\REDO01.LOG 52428800

SQL> select group#,status from v$log;
GROUP# STATUS

---------- ----------------

1 CURRENT

2 UNUSED

3 UNUSED

SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.

SQL> select group#,status from v$log;
GROUP# STATUS

---------- ----------------

1 ACTIVE

2 ACTIVE

3 CURRENT

SQL> alter database drop logfile group 1;

alter database drop logfile group 1*ERROR at line 1:ORA-01624: log 1 needed for crash recovery of instance test (thread 1)ORA-00312: online log 1 thread 1: 'C:\APP\M.TAJ\ORADATA\TEST\REDO01.LOG'

When you get above error message then set checkpoint with below command.

SQL> alter system checkpoint global;
System altered.
SQL> alter database drop logfile group 1;
Database altered.
SQL> alter database add logfile group 1 size 10m;
Database altered.

SQL> alter system checkpoint global;
System altered.
SQL> alter database drop logfile group 2;
Database altered.
SQL> alter database add logfile group 2 size 10m;
Database altered.

SQL> alter system checkpoint global;
System altered.
SQL> alter database drop logfile group 3;
Database altered.
SQL> alter database add logfile group 3 size 10m;
Database altered.

SQL> column member format a30

SQL> select a.group#, a.member, b.bytes

2 from v$logfile a, v$log b where a.group# = b.group#;
GROUP# MEMBER BYTES

---------- ------------------------------ ----------

3 +DGRP2/test/onlinelog/group_3. 10485760 277.652273117
2 +DGRP2/test/onlinelog/group_2. 10485760 274.652273019
1 +DGRP2/test/onlinelog/group_1. 10485760 271.652272977
1 +DGRP2/test/onlinelog/group_1. 10485760 272.652272979
2 +DGRP2/test/onlinelog/group_2. 10485760 275.652273021
3 +DGRP2/test/onlinelog/group_3. 10485760 278.652273119
6 rows selected.

6. Recreate SPFILE on ASM diskgroup

SQL> create pfile='c:\initTEST.ora' from spfile;
File created.
SQL> create spfile='+DGRP2/spfileTEST.ora' from pfile='c:\initTEST.ora';
File created.

7. Detele all backup copy from RMAN

RMAN> delete noprompt force copy;

Find more details

http://www.idevelopment.info/data/Oracle/DBA_tips/Automatic_Storage_Management/ASM_33.shtml#Overview


3 comments:

Babu B said...

Taj,

Did you used any the below parameters ASM_POWER_LIMIT, ASK_DISKSTRING and ASK_DISKGROUPS?

Babu

Arju said...

Very nice and useful documents.

Arju(http://arjudba.blogspot.com/)
http://arjudba.blogspot.com/

Mohammed Taj said...

Babu,
I didn't use ASM_POWER parameter i used default value for this.

ASM_DISKSTRING yes i used this parameter for specify ASM disks.

ASM_DISKGROUPS no i not used this parameter and used default value for this.

Regards
Taj