This document describes the procedure required to migrate a database from Windows to Linux using the RMAN Convert Database command.

 Both Windows and Linux platforms have the same endian format, which makes possible to transfer the whole database,making the migration process very straightforward and simple.

 I have taken following into assumption.

RDBMS with same version is already there in Linux server. If its not present then Install oracle10g same version as we have at windows machine. Although upgradation is also possible.

 Check platform compatibility between source and target OS

 SQL> select * from V$DB_TRANSPORTABLE_PLATFORM

 where PLATFORM_NAME=’Microsoft Windows IA (32-bit)’ or

 PLATFORM_NAME like ‘Linux%’

 /

PLATFORM_ID PLATFORM_NAME ENDIAN_FORMAT

———– ——————————————— ————–

7 Microsoft Windows IA (32-bit) Little

10 Linux IA (32-bit) Little

11 Linux IA (64-bit) Little

13 Linux x86 64-bit Little

1. 2.    Start the database in read only mode

In order to execute dbms_tdb.check_db the database must be opened on read only mode.

SQL> shutdown immediate;

 SQL> startup mount;

 SQL> alter database open read only;

 3.    Check database readiness for transport from Windows to Linux

If the execution of dbms_tdb.check_db does not return any exceptions, that means the database is ready for transport to the target platform.

 SQL> set serveroutput on

SQL> declare

2 db_ready boolean;

3 begin

4 db_ready := dbms_tdb.check_db(‘Linux IA (32-bit)’);

5 end;

6 /

PL/SQL procedure successfully completed.

4.    Check if there are any external objects

If there is any external objects take note of them, they will need to be taken care

manually

SQL> set serveroutput on

SQL> declare

2 external boolean;

3 begin

4 /* value of external is ignored, but with SERVEROUTPUT set to ON

5 * dbms_tdb.check_external displays report of external objects

6 * on console */

7 external := dbms_tdb.check_external;

8 end;

9 /

The following directories exist in the database:

SYS.DATA_PUMP_DIR, SYS.ORACLE_OCM_CONFIG_DIR, SYS.ADMIN_DIR, SYS.WORK_DIR

PL/SQL procedure successfully completed.

 5.    Using the RMAN CONVERT DATABASE Command

Having executed successfully the checkup steps, the database is open in read only mode, then the convert database command can be executed with Rman.

 I am changing my database name from “WIN1” to “LIN1”.There are 2 options suggested you can follow any one of them as per your requirement.

 C:\Documents and Settings\ssethia>rman target / nocatalog

 First option is

 RMAN> CONVERT DATABASE NEW DATABASE ‘LIN1′

2> transport script ‘F:\transportscript’

3> to platform ‘Linux IA (32-bit)’;

 Your datafiles and Initfile will copy to $ORACLE_HOME/database Like..

 At location “F:\oracle\product\10.2.0\db_1\database”

You will find datafiles with name like

“DATA_D-WIN1_I-3182306851_TS-SYSTEM_FNO-1_01KK4H9T”

And initfile like

“INIT_00KK4H9T_1_0.ORA”

Importantly you will find transport script ‘F:\transportscript’

 Second option is

CONVERT DATABASE NEW DATABASE ‘LIN1′

transport script ‘F:\transportscript_sum1.sql’

to platform ‘Linux IA (32-bit)’

db_file_name_convert ‘F:\oracle\product\10.2.0\oradata\Win1′,’F:\LIN1_data’; ;

 In this command you can define the target location.like “F:\LIN1_data”

 I am using first option.

 PLEASE Don’t run “transportscript” at this point.

 – The following commands will create a new control file and use it

– to open the database.

– Data used by Recovery Manager will be lost.

– The contents of online logs will be lost and all backups will

– be invalidated. Use this only if online logs are damaged.

– After mounting the created controlfile, the following SQL

– statement will place the database in the appropriate

– protection mode:

–  ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE

STARTUP NOMOUNT PFILE=’/vol2/oracle/product/10.2.0/db_1/database/INIT_00KK4H9T_1_0.ORA’

– Create SPFILE

CREATE SPFILE FROM PFILE = ‘/vol2/oracle/product/10.2.0/db_1/database/INIT_00KK4H9T_1_0.ORA’;

STARTUP FORCE NOMOUNT

CREATE CONTROLFILE REUSE SET DATABASE ‘LIN1′ RESETLOGS  NOARCHIVELOG

    MAXLOGFILES 16

    MAXLOGMEMBERS 3

    MAXDATAFILES 100

    MAXINSTANCES 8

    MAXLOGHISTORY 292

LOGFILE

  GROUP 1 ‘/vol2/oracle/product/10.2.0/db_1/database/ARCH_D-LIN1_ID-3182306851_S-2_T-1_A-692205924_00KK4H9T’  SIZE 50M,

  GROUP 2 ‘/vol2/oracle/product/10.2.0/db_1/database/ARCH_D-LIN1_ID-3182306851_S-0_T-1_A-692205924_00KK4H9T’  SIZE 50M,

  GROUP 3 ‘/vol2/oracle/product/10.2.0/db_1/database/ARCH_D-LIN1_ID-3182306851_S-1_T-1_A-692205924_00KK4H9T’  SIZE 50M

DATAFILE

  ‘/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-SYSTEM_FNO-1_01KK4H9T’,

  ‘/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-UNDOTBS1_FNO-2_04KK4HBC’,

  ‘/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-SYSAUX_FNO-3_02KK4HAM’,

  ‘/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-USERS_FNO-4_05KK4HBG’,

  ‘/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-EXAMPLE_FNO-5_03KK4HB5′

CHARACTER SET WE8MSWIN1252

;

 – Database can now be opened zeroing the online logs.

ALTER DATABASE OPEN RESETLOGS;

– Commands to add tempfiles to temporary tablespaces.

– Online tempfiles have complete space information.

– Other tempfiles may require adjustment.

ALTER TABLESPACE TEMP ADD TEMPFILE ‘/vol2/oracle/product/10.2.0/db_1/database/DATA_D-LIN1_I-3182306851_TS-TEMP_FNO-1_00KK4H9T’ SIZE 20M;

– End of tempfile additions.

set echo off

prompt ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

prompt * Your database has been created successfully!

prompt * There are many things to think about for the new database. Here

prompt * is a checklist to help you stay on track:

prompt * 1. You may want to redefine the location of the directory objects.

prompt * 2. You may want to change the internal database identifier (DBID)

prompt *    or the global database name for this database. Use the

prompt *    NEWDBID Utility (nid).

prompt ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SHUTDOWN IMMEDIATE

STARTUP UPGRADE

@@ ?/rdbms/admin/utlirp.sql

SHUTDOWN IMMEDIATE

STARTUP

– The following step will recompile all PL/SQL modules.

– It may take serveral hours to complete.

@@ ?/rdbms/admin/utlrp.sql

set feedback 6;

6.    Copy Converted Datafiles, Generated Transport Script and Parameter File to the Linux

We need to copy over the generated files to the Linux server, they include all converted datafiles, the transport

script and the generated pfile.

If needed create at this point the directories you will need on the Linux server, for dump destination and flash

recovery area i.e.:

 mkdir –p /vol2/database/LIN1/FRA

mkdir -p /vol2/oracle/app/admin/LIN1/adump

mkdir -p /vol2/oracle/app/admin/LIN1/bdump

mkdir -p /vol2/oracle/app/admin/LIN1/cdump

mkdir -p /vol2/oracle/app/admin/LIN1/udump

 7.    Copy/FTP the files to the required LINUX server

 You can use ftp to copy the required files to the Linux server.

 [sumit::/vol2/oracle/product/10.2.0/db_1/database] $ls -lrt

total 1227560

-rw-rw-r– 1 sumit sumit      3088 2009-07-14 16:16 TRANSPORTSCRIPT

-rw-rw-r– 1 sumit sumit      1456 2009-07-14 16:39 INIT_00KK4H9T_1_0.ORA

-rw-rw—- 1 sumit sumit  52429312 2009-07-14 22:40 ARCH_D-LIN1_ID-3182306851_S-2_T-1_A-692205924_00KK4H9T

-rw-rw—- 1 sumit sumit  52429312 2009-07-14 22:44 ARCH_D-LIN1_ID-3182306851_S-0_T-1_A-692205924_00KK4H9T

-rw-rw-r– 1 sumit sumit   5251072 2009-07-14 22:50 DATA_D-WIN1_I-3182306851_TS-USERS_FNO-4_05KK4HBG

-rw-rw-r– 1 sumit sumit 104865792 2009-07-14 22:50 DATA_D-WIN1_I-3182306851_TS-EXAMPLE_FNO-5_03KK4HB5

-rw-rw—- 1 sumit sumit  20979712 2009-07-14 22:51 DATA_D-LIN1_I-3182306851_TS-TEMP_FNO-1_00KK4H9T

-rw-rw-r– 1 sumit sumit 241180672 2009-07-15 00:18 DATA_D-WIN1_I-3182306851_TS-SYSAUX_FNO-3_02KK4HAM

-rw-rw-r– 1 sumit sumit 225452032 2009-07-15 00:20 DATA_D-WIN1_I-3182306851_TS-UNDOTBS1_FNO-2_04KK4HBC

-rw-rw-r– 1 sumit sumit 513810432 2009-07-15 00:21 DATA_D-WIN1_I-3182306851_TS-SYSTEM_FNO-1_01KK4H9T

-rw-rw—- 1 sumit sumit  52429312 2009-07-15 00:21 ARCH_D-LIN1_ID-3182306851_S-1_T-1_A-692205924_00KK4H9T

-rw-rw—- 1 sumit sumit   7389184 2009-07-15 00:21 CF_D-LIN1_ID-3182306851_00KK4H9T

 8.    Edit init.ora and Transport Script for new database

 You need to make directory structure related changes and replace “ “ “ double codes  with “ ‘ “ single code.

 9.    Execute the Transport Script

 SQL> @transport

Script will perform followings:-

CREATE CONTROLFILE

DATABASE OPEN RESETLOGS

ADD TEMPFILES

And

SHUTDOWN IMMEDIATE

STARTUP UPGRADE

@@ ?/rdbms/admin/utlirp.sql

SHUTDOWN IMMEDIATE

STARTUP

– The following step will recompile all PL/SQL modules.

– It may take serveral hours to complete.

@@ ?/rdbms/admin/utlrp.sql

10.  Change database identifier

To change the database identifier you need to use the NEWDBID utility “nid”. It is run from within Sqlplus having

the database mounted:

sqlplus “/ as sysdba”

startup mount

exit

To change the DBID

cd $ORACLE_HOME/bin

./nid target=/

11. Check database integrity

SQL> select tablespace_name from dba_tablespaces;

TABLESPACE_NAME

——————————

SYSTEM

UNDOTBS1

SYSAUX

TEMP

USERS

EXAMPLE

6 rows selected.

SQL> select file_name from dba_data_files;

FILE_NAME

——————————————————————————–

/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-EXAMPLE_FN

O-5_03KK4HB5

/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-USERS_FNO-

4_05KK4HBG

/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-SYSAUX_FNO

-3_02KK4HAM

/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-UNDOTBS1_F

NO-2_04KK4HBC

FILE_NAME

——————————————————————————–

/vol2/oracle/product/10.2.0/db_1/database/DATA_D-WIN1_I-3182306851_TS-SYSTEM_FNO

-1_01KK4H9T

SQL> SELECT COMP_NAME,STATUS FROM DBA_REGISTRY;

COMP_NAME                                          STATUS

————————————————– ———–

Oracle Database Catalog Views                      VALID

Oracle Database Packages and Types                 VALID

Oracle Workspace Manager                           VALID

JServer JAVA Virtual Machine                       VALID

Oracle XDK                                         VALID

Oracle Database Java Packages                      VALID

Oracle Expression Filter                           VALID

Oracle Data Mining                                 VALID

Oracle Text                                        VALID

Oracle XML Database                                VALID

Oracle Rules Manager                               VALID

COMP_NAME                                          STATUS

————————————————– ———–

Oracle interMedia                                  VALID

OLAP Analytic Workspace                            VALID

Oracle OLAP API                                    VALID

OLAP Catalog                                       VALID

Spatial                                            VALID

Oracle Enterprise Manager                          VALID

17 rows selected.