Migration from Oracle to DB2 UDB on Unix

Hi SAP Expert
We have different SAP landscape in our company on Oracle DB
Due to High Oracle Licensing cost we are planning to migrate our Database to DB2 to reduce license cost
I would like to know how Reliable DB2 is for SAP? What is % of SAP installation on DB2 worldwide
Also will there be challenge migrating DB from Oracle to DB2
I would appreciate if you can provide guidance on the question
Thanks in advace
Thanks
Deelip

> I would like to know how Reliable DB2 is for SAP? What is % of SAP installation on DB2 worldwide
DB2 was and is used on quite a number of internal SAP systems that create support packages (if you check the import logs of the support packages and search for "source system).
SAP doesn't give any exact numbers of installations compared to other databases, they did that in the past.
> Also will there be challenge migrating DB from Oracle to DB2
As with every database migration you'll have to check your custom programs and secondary indexes, backup strategies and methods and such.
> I would appreciate if you can provide guidance on the question
Be aware of the fact that you must have a certified migration consultant doing the migration on-site, otherwise SAP will deny OSS support and bill (see http://service.sap.com/osdbmigration).
Markus

Similar Messages

Re Migrating from Oracle to DB2

Hi All,
We are migrating from Oracle to DB2, so just wanted to know what will be the impact when we do this, i mean what all necessary steps should be taken to do so. I am a technical consultant involved in this project so not much idea regarding this.
Also please let me know will it effect the custom i mean the Z programs that we have created. Please let me know regarding this.
Thanks and Regards,
Salish.

> We are migrating from Oracle to DB2, so just wanted to know what will be the impact when we do this, i mean what all necessary steps should be taken to do so. I am a technical consultant involved in this project so not much idea regarding this.
A heterogeneous migration (changing database and/or operating system) implies a certified migration consultant doing the migration, otherwise you'll loose support from SAP for problems during the migration and for the target system (http://service.sapcom/osdbmigration --> FAQ).
> Also please let me know will it effect the custom i mean the Z programs that we have created. Please let me know regarding this.
Depending on how you access the data you may need to increase/delete indexes or change the programs to get a better speed.
Markus

SAP Database Migration from Oracle to DB2

Hi All,
Our client has decided to move the SAP database from Oracle 10.0.2 to IBM DB2. We will like to know list of activities which are required to be done from application side to support this.
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> Our client has decided to move the SAP database from Oracle 10.0.2 to IBM DB2. We will like to know list of activities which are required to be done from application side to support this.
http://service.sap.com/osdbmigration
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Hi Ronny,
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Error in "Checking Availabe Space for the DB2 UDB for Unix..." phase

Hello,
We are in the middle of an Upgrade proyect from R/3 4.6C (kernet 4.6D EXT) to ECC 6.0.
As a first step we are doing an Heterogenous System Copy to migrate from servers with HP-UX B11.11/Informix 9.4 to servers with AIX 5.3/DB2 UDB 8.
We already did the database import with no errors. When we are installing R3 4.6C in the target server we are getting u201CMemory Fault (coredump)u201D error in the u201CChecking Availabe Space for the DB2 UDB for Unix, Windows Tablespacesu201D phase.
Any advice will be appreciated.
Best Regards
Francisco

Hello Paul,
There is no db2diag.log. We are in the first steps of the installation.
Operating System logs just shows an ABNORMALY TERMINATION OF SOTWARE error.
This is the CEDBMIG.log
INFO 2010-08-04 10:12:00 CommandFileController SyFileCopy:150
 Copying source file CEDBMIG.R3S to target file CEDBMIG.R3S.30 ...
INFO 2010-08-04 10:12:01 Main
 Preparation successfully completed.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:434
 checking host name lookup for 'sapqas'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:473
 offical host name for 'sapqas' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:541
 host 'sapqas' has ip address '172.26.26.64'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:581
 offical host name for '172.26.26.64' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:434
 checking host name lookup for 'sapqas'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:473
 offical host name for 'sapqas' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:541
 host 'sapqas' has ip address '172.26.26.64'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:581
 offical host name for '172.26.26.64' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:434
 checking host name lookup for 'sapqas'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:473
 offical host name for 'sapqas' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:541
 host 'sapqas' has ip address '172.26.26.64'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:581
 offical host name for '172.26.26.64' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:434
 checking host name lookup for 'sapqas'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:473
 offical host name for 'sapqas' is 'sapqas'.
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:541
 host 'sapqas' has ip address '172.26.26.64'
INFO 2010-08-04 10:12:02 CENTRDBINSTANCE_IND_DB6 SyCheckHostnameLookup:581
 offical host name for '172.26.26.64' is 'sapqas'.
INFO 2010-08-04 10:12:23 CDSERVERMIG_IND_DB6 InternalColdKeyCheck:0
 The CD KERNEL will not be copied.
INFO 2010-08-04 10:12:23 CDSERVERMIG_IND_DB6 InternalColdKeyCheck:0
 The CD RDBMS will not be copied.
INFO 2010-08-04 10:12:23 CDSERVERMIG_IND_DB6 InternalColdKeyCheck:0
 The CD EXPORT1 will not be copied.
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SyCoprocessCreate:300
 Creating coprocess /usr/sbin/lsattr -El sys0 -a realmem ...
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SyRamSizeGet:100
 The process lsattr puts out:
 realmem 8388608 Amount of usable physical memory in Kbytes False
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SyRamSizeGet:700
 Physical RAM size is 8192 MB.
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SySwapGetSize:100
 Retrieving swap space size ...
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SyCoprocessCreate:300
 Creating coprocess /usr/sbin/lsps -s ...
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SySwapGetSize:150
 The process lsps puts out:
 Total Paging Space Percent Used
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SySwapGetSize:150
 The process lsps puts out:
 8192MB 1%
INFO 2010-08-04 10:12:23 CALCRAM_IND_DB6 SySwapGetSize:500
 Currently activated swap space is 8192 MB.
INFO 2010-08-04 10:12:31 CENTRDBINSTANCE_IND_DB6 InternalWarmKeyCheck:0
 The installation phase is starting now. Please look in the log
 file for further information about current actions.
INFO 2010-08-04 10:12:31
 Requesting Installation Details
INFO 2010-08-04 10:12:31
 Reading and Checking DB2 UDB for UNIX, Windows Specific Keys
INFO 2010-08-04 10:12:31
 Select the DB2 Storage Management.
INFO 2010-08-04 10:12:31
 Choose the number of storage paths for DB2's Automatic Storage
 Management.
INFO 2010-08-04 10:12:31 CDSERVERMIG_IND_DB6 InternalWarmKeyCheck:0
 The CD KERNEL will not be copied.
INFO 2010-08-04 10:12:31 CDSERVERMIG_IND_DB6 InternalWarmKeyCheck:0
 The CD RDBMS will not be copied.
INFO 2010-08-04 10:12:31 CDSERVERMIG_IND_DB6 InternalWarmKeyCheck:0
 The CD EXPORT1 will not be copied.
INFO 2010-08-04 10:12:31
 Requesting Information on CD-ROMs
INFO 2010-08-04 10:12:31
 Calculating RAM Distribution
INFO 2010-08-04 10:12:31
 Creating the Service Entry for the Dispatcher
INFO 2010-08-04 10:12:31
 Creating the Service Entry for the Gateway Service
INFO 2010-08-04 10:12:31
 Creating the Service Entry for the Secure Gateway Service
INFO 2010-08-04 10:12:31
 Creating the Service Entry for the Message Server
INFO 2010-08-04 10:12:31
 Creating the SAP Administration Group sapsys
INFO 2010-08-04 10:12:32
 Creating the Database Administration Group db<dbsid>adm
INFO 2010-08-04 10:12:32
 Creating the Group db<dbsid>ctl
INFO 2010-08-04 10:12:32
 Creating the Group db<dbsid>mnt
INFO 2010-08-04 10:12:32
 Creating the SAP connect user
INFO 2010-08-04 10:12:32
 Setting Password of the SAP connect user
INFO 2010-08-04 10:12:32
 Creating the db2<sapsid> User
INFO 2010-08-04 10:12:32
 Setting the User Password
INFO 2010-08-04 10:12:32
 Creating the SAP System Administrator
INFO 2010-08-04 10:12:32
 Setting Password for for the SAP System Administrator
INFO 2010-08-04 10:12:32
 Creating Directories
INFO 2010-08-04 10:12:32
 Creating Symbolic Links
INFO 2010-08-04 10:12:32
 Getting Minimal Size of the Database
INFO 2010-08-04 10:12:32
 Changing DB2 UDB for UNIX, Windows Tablespace Data
INFO 2010-08-04 10:12:32
 Checking if Required Directories Exist
INFO 2010-08-04 10:12:32
 Checking Available Space for the SAP Instance
INFO 2010-08-04 10:12:32
 Checking Available Space for the DB2 UDB for UNIX, Windows
 Tablespaces
This is the CEDBMIG.R3S log
120_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/SAPSRC.CSH
130_SOURCE=@DB_HOME@/.cshrc
130_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/DBSRC.CSH
200_SOURCE=@DB_HOME@/.profile
200_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/SAPSRC.SH
210_SOURCE=@DB_HOME@/.profile
210_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/DBSRC.SH
[Z_OSUSERSIDADMENVIRONMENT_IND_DB6]
100_GROUP=sapsys
100_OWNER=@LOWER_SAPSYSTEMNAME@adm
100_PERMISSION=0644
100_SOURCE=@HOME@/.login
100_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/SAPSRC.CSH
110_SOURCE=@HOME@/.login
110_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/DBSRC.CSH
120_GROUP=sapsys
120_OWNER=@LOWER_SAPSYSTEMNAME@adm
120_PERMISSION=0644
120_SOURCE=@HOME@/.cshrc
120_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/SAPSRC.CSH
130_SOURCE=@HOME@/.cshrc
130_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/DBSRC.CSH
200_SOURCE=@HOME@/.profile
200_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/SAPSRC.SH
210_SOURCE=@HOME@/.profile
210_TEMPLATE=@CDMOUNTPATH@/@OS@/COMMON/INSTALL/DBSRC.SH
[Z_R3DIRECTORIES_IND_IND]
101_PATH=@SAPDIR@
101_PERMISSION=0775
101_SET_FILE_ATTRIBUTES=YES
101_USERGROUP=sapsys
101_USERNAME=@LOWER_SAPSYSTEMNAME@adm
102_PATH=@SAPDIR@/tmp
103_PATH=@SAPDIR@/trans
104_PATH=@SAPDIR@/trans/tmp
104_SET_FILE_ATTRIBUTES=NO
105_PATH=@SAPDIR@/trans/EPS
106_PATH=@SAPDIR@/trans/EPS/in
107_PATH=@SAPDIR@/trans/EPS/out
108_PATH=@SAPDIR@/trans/EPS/log
109_PATH=@SAPDIR@/trans/bin
110_PATH=@SAPDIR@/trans/buffer
111_PATH=@SAPDIR@/trans/cofiles
112_PATH=@SAPDIR@/trans/data
113_PATH=@SAPDIR@/trans/etc
114_PATH=@SAPDIR@/trans/log
115_PATH=@SAPDIR@/trans/sapnames
120_PATH=@SAPDIR@/@SAPSYSTEMNAME@
120_PERMISSION=0751
120_SET_FILE_ATTRIBUTES=YES
121_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS
121_PERMISSION=0755
122_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS/exe
123_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS/exe/opt
124_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS/gen
125_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS/gen/opt
126_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS/gen/dbg
127_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS/src
128_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@
129_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@/data
130_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@/log
131_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@/work
131_PERMISSION=0775
132_PATH=@SAPMOUNT@
140_PATH=@SAPMOUNTEXE@
141_PATH=@SAPMOUNTPROFILE@
141_PERMISSION=0755
142_PATH=@SAPMOUNTGLOBAL@
142_PERMISSION=0700
150_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@/sec
160_PATH=@STARTDIRECTORY@
160_PERMISSION=0777
[Z_R3DIRPERMISSIONS_IND_IND]
101_CHANGE_ON_NFS=NO
101_PATH=@SAPMOUNT@
101_PERMISSION=0755
101_TRAVERSE=
101_USERGROUP=sapsys
101_USERNAME=@LOWER_SAPSYSTEMNAME@adm
102_CHANGE_ON_NFS=NO
102_PATH=@SAPMOUNTEXE@
102_PERMISSION=0755
102_TRAVERSE=
102_USERGROUP=sapsys
102_USERNAME=@LOWER_SAPSYSTEMNAME@adm
103_CHANGE_ON_NFS=NO
103_PATH=@SAPMOUNTGLOBAL@
103_PERMISSION=0710
103_TRAVERSE=
103_USERGROUP=db@LOWER_DB_SID@adm
103_USERNAME=@LOWER_SAPSYSTEMNAME@adm
104_CHANGE_ON_NFS=NO
104_PATH=@SAPMOUNTPROFILE@
104_PERMISSION=0755
104_TRAVERSE=
104_USERGROUP=sapsys
104_USERNAME=@LOWER_SAPSYSTEMNAME@adm
105_CHANGE_ON_NFS=NO
105_PATH=@SAPDIR@/@SAPSYSTEMNAME@
105_PERMISSION=0755
105_TRAVERSE=
105_USERGROUP=sapsys
105_USERNAME=@LOWER_SAPSYSTEMNAME@adm
120_CHANGE_ON_NFS=NO
120_PATH=@HOME@
120_PERMISSION=0700
120_TRAVERSE=
120_USERGROUP=sapsys
120_USERNAME=@LOWER_SAPSYSTEMNAME@adm
121_CHANGE_ON_NFS=NO
121_PATH=@HOME@
121_PERMISSION=0777
121_TRAVERSE=FILES
121_USERGROUP=sapsys
121_USERNAME=@LOWER_SAPSYSTEMNAME@adm
130_CHANGE_ON_NFS=NO
130_PATH=@STARTDIRECTORY@
130_PERMISSION=0777
130_TRAVERSE=
130_USERGROUP=sapsys
130_USERNAME=@LOWER_SAPSYSTEMNAME@adm
140_CHANGE_ON_NFS=YES
140_PATH=@SAPDIR@/trans
140_PERMISSION=0775
140_TRAVERSE=
140_USERGROUP=sapsys
140_USERNAME=@LOWER_SAPSYSTEMNAME@adm
141_CHANGE_ON_NFS=YES
141_PATH=@SAPDIR@/trans/bin
141_PERMISSION=0775
141_TRAVERSE=
141_USERGROUP=sapsys
141_USERNAME=@LOWER_SAPSYSTEMNAME@adm
[Z_R3FILEPERMISSIONS_IND_IND]
101_CHANGE_ON_NFS=NO
101_PATH=@SAPMOUNTEXE@
101_PERMISSION=0755
101_TRAVERSE=SUBDIRECTORIES
101_USERGROUP=sapsys
101_USERNAME=@LOWER_SAPSYSTEMNAME@adm
102_CHANGE_ON_NFS=NO
102_PATH=@SAPMOUNTEXE@
102_PERMISSION=0755
102_TRAVERSE=FILES
102_USERGROUP=sapsys
102_USERNAME=@LOWER_SAPSYSTEMNAME@adm
103_CHANGE_ON_NFS=NO
103_PATH=@SAPMOUNTGLOBAL@
103_PERMISSION=0700
103_USERGROUP=sapsys
103_USERNAME=@LOWER_SAPSYSTEMNAME@adm
104_CHANGE_ON_NFS=NO
104_PATH=@SAPMOUNTPROFILE@
104_PERMISSION=0755
104_TRAVERSE=SUBDIRECTORIES
104_USERGROUP=sapsys
104_USERNAME=@LOWER_SAPSYSTEMNAME@adm
105_CHANGE_ON_NFS=NO
105_PATH=@SAPMOUNTPROFILE@
105_PERMISSION=0755
105_TRAVERSE=FILES
105_USERGROUP=sapsys
105_USERNAME=@LOWER_SAPSYSTEMNAME@adm
106_CHANGE_ON_NFS=NO
106_PATH=@SAPMOUNTEXE@/saposcol
106_PERMISSION=04755
106_USERGROUP=sapsys
106_USERNAME=root
112_CHANGE_ON_NFS=NO
112_PATH=@SAPDIR@/@SAPSYSTEMNAME@
112_PERMISSION=0751
112_TRAVERSE=SUBDIRECTORIES
112_USERGROUP=sapsys
112_USERNAME=@LOWER_SAPSYSTEMNAME@adm
113_CHANGE_ON_NFS=NO
113_PATH=@SAPDIR@/@SAPSYSTEMNAME@
113_PERMISSION=0751
113_TRAVERSE=FILES
113_USERGROUP=sapsys
113_USERNAME=@LOWER_SAPSYSTEMNAME@adm
114_CHANGE_ON_NFS=NO
114_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS
114_PERMISSION=0755
114_TRAVERSE=SUBDIRECTORIES
114_USERGROUP=sapsys
114_USERNAME=@LOWER_SAPSYSTEMNAME@adm
115_CHANGE_ON_NFS=NO
115_PATH=@SAPDIR@/@SAPSYSTEMNAME@/SYS
115_PERMISSION=0755
115_TRAVERSE=FILES
115_USERGROUP=sapsys
115_USERNAME=@LOWER_SAPSYSTEMNAME@adm
116_CHANGE_ON_NFS=NO
116_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@
116_PERMISSION=0755
116_TRAVERSE=SUBDIRECTORIES
116_USERGROUP=sapsys
116_USERNAME=@LOWER_SAPSYSTEMNAME@adm
117_CHANGE_ON_NFS=NO
117_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@
117_PERMISSION=0755
117_TRAVERSE=FILES
117_USERGROUP=sapsys
117_USERNAME=@LOWER_SAPSYSTEMNAME@adm
118_CHANGE_ON_NFS=NO
118_PATH=@SAPDIR@/@SAPSYSTEMNAME@/@INSTANCENAME@/work
118_PERMISSION=0775
118_USERGROUP=sapsys
118_USERNAME=@LOWER_SAPSYSTEMNAME@adm
120_CHANGE_ON_NFS=NO
120_PATH=@HOME@
120_PERMISSION=0700
120_USERGROUP=sapsys
120_USERNAME=@LOWER_SAPSYSTEMNAME@adm
121_CHANGE_ON_NFS=NO
121_PATH=@HOME@
121_PERMISSION=0700
121_TRAVERSE=FILES
121_USERGROUP=sapsys
121_USERNAME=@LOWER_SAPSYSTEMNAME@adm
[Z_R3LINKS_IND_IND]
101_LINKCONTENT=@SAPMOUNTEXE@
101_LINKNAME=@SAPDIR@/@SAPSYSTEMNAME@/SYS/exe/dbg
102_LINKCONTENT=dbg
102_LINKNAME=@SAPDIR@/@SAPSYSTEMNAME@/SYS/exe/run
103_LINKCONTENT=@SAPMOUNTGLOBAL@
103_LINKNAME=@SAPDIR@/@SAPSYSTEMNAME@/SYS/global
104_LINKCONTENT=@SAPMOUNTPROFILE@
104_LINKNAME=@SAPDIR@/@SAPSYSTEMNAME@/SYS/profile
[Z_SAPDATAPATH]
S1=/db2/@SAPSYSTEMNAME@/sapdata1
S2=/db2/@SAPSYSTEMNAME@/sapdata2
S3=/db2/@SAPSYSTEMNAME@/sapdata3
S4=/db2/@SAPSYSTEMNAME@/sapdata4
S5=/db2/@SAPSYSTEMNAME@/sapdata5
S6=/db2/@SAPSYSTEMNAME@/sapdata6
SAPDATAT=/db2/@SAPSYSTEMNAME@/sapdatat
As you can see there is not an error message, the installation simply stops when the try to check the space available for tablespaces.
Regards

Oracle for DB2 UDB DBA's

Hi,
In our shop management decided to migrate few SAP R/3 applications to Oracle 10G (RAC) from DB2 UDB. I am a DB2 UDB DBA. i want to learn Oracle. Is there any manuals or published books for Oracle DBA for DB2 UDB DBA's in SAP environment.
As i am not new to DBA world, i want to compare Oracle with DB2 UDB . So that i can learn Oracle fast.
Regards,
Sunil Gutta

> As i am not new to DBA world, i want to
> compare Oracle with DB2 UDB . So that i can learn
> Oracle fast.
have a look here:
-> <a href="http://www.redbooks.ibm.com/abstracts/sg247048.html">Oracle to DB2 UDB Conversion Guide</a>
it's the other way round but should give you enough to work on
GreetZ, AH

What are the Issues in Migration from oracle 8i to oracle 10g

Hi,
Can you let me know what are the issues that i face when i migrate from oracle 8i to oracle 10g. I will be very thankful if you give me a list of issues that you face while migrating from 8i to 10g

In addition to Max's reply, you must be aware that you have to test your applications agains 10g database before you actually upgrade the database.
If you use CBO, it may produce different execution plans for one query when you run it in 8i and 10g. This may affect your application performances, which you don't like to happen.
Also you have to decide how much downtime you can afford during the migration. Can you afford some downtime and how much? If you can't than this makes the situation more complicated.
How big is your database? You may end up only with simple export/import solution using export import utility.
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MIgration from Oracle 9.2.4.0 to Oracle 10g Release 2 (10.2.0.1.0)

Hello
We are planning to upgrade and migrate from Oracle 9 to Oracle 10. ( both version on windows)
Would be of great help if I could avail the below information.
Most of the Instance are more than 50 gig
1 Should use a EXP / IMP or Should use DBUA ( prefer a safe method )
2.IF DBUA used any idea how much time it should take .
3.Any other method for upgrade.
We are currently in an analysis phase , we do have some instance that are already 10g but were created from scratch.
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Cheers

Most of the Instance are more than 50 gig
1 Should use a EXP / IMP or Should use DBUA ( prefer
a safe method )Use DBUA , it is safer then exp/imp
2.IF DBUA used any idea how much time it should take
It depend on database , machine etc. it should not take more then 2-3 Hr
3.Any other method for upgrade.
I always use manual method and feel manual upgrade is safest.
All details is given in Oracle Documentation
Oracle Database Upgrade Guide
# Virag Sharma

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We are planning to move our production system which is currently running ECC5 on AIX OS and Oracle 9i database to AIX OS and Oracle 10g database.
Some doubts regarding the above procedure:
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Hello,
After the migration from oracle to MaxDb we have serious performance issues with a lot of our tableview selections.
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Best regards !!!
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Hello Gert-Jan,
most probably you need additional indexes to get better performance.
Using the command monitor you can identify the long running SQL statements and check the optimizer access strategy. Then you can decide which indexes might help.
If this is about an SAP system, you can find additional information about performance analysis in SAP notes 725489 and 819641.
SAP Hosting provides the so-called service 'MaxDB Migration Support' to help you in such cases. The service description can be found here:
http://www.saphosting.de/mediacenter/pdfs/solutionbriefs/MaxDB_de.pdf
http://www.saphosting.com/mediacenter/pdfs/solutionbriefs/maxDB-migration-support_en.pdf.
Best regards,
Melanie Handreck

Database link from oracle to db2

Can any help me to create a database link from oracle to db2. It would be greatful if you can provide me detail steps

You don't give us much information to go on. What version of Oracle? What platform is DB2 running on? You might want to take a look at this. You might also look here and here.
Tom

Regarding database migration from Oracle to MS SQL

Hi All,
In my application, the existing database is oracle. we need to migrate from Oracle db to MS SQL.
We need procedure is as below
1.export data from Oracle and keep it in a file.(.dmp)
2.Import data to MS SQL from the exported oracle file.
and vice versa from MS SQL to Oracle.
my question is- is it possible to import .bmp (oracle export data) into MS SQL.
Please clarify me.

There are couple of options to get data from Oracle to MS SQL.
The simplest is to create a linked server in MS SQL that points to Oracle and copy data with a query like select * into my_mssqlTable from oracle.schema.table; via the linked server.
Some data types will not be supported.
That is for one time copy.
If you need a close to real time replication you can use MS replication (I would not recommend because it creates triggers on Oracle tables), or you can use GoldenGate or DataCurrents or other replication products.

Migration from oracle forms to SOA

Hello everybody,
I work in a company that develops a product for financial institutes. we have the product developed using oracle forms, and we want to migrate it to an SOA environnement but i have some questions that i'd be happy if someone answered to them.
1- We want to use oracle soa suite for the migration, in this case should a client, who will buy the application, buy oracle SOA suite. if this is the case, what are the minimum components of oracle soa suite a client should buy.
2- Can we implement a service oriented architecture without using an ESB??
3- What steps could we follow to migrate from oracle forms to oracle SOA suite.
thanks

From my knowledge acquainted through White papers - This is what I think - Even I am in the process of understanding and learning SOA enablement technologies,
Migrating from Forms world to SOA - If there is a real need to migrate the solution to latest technologies then we have to capture the forms logic to redesign in ADF of the Fusion Middleware techstack but if the business need currently works well with the forms based application and we have other system which need integration with this forms based system - You can definetly keep all the hetrogenous systems and architect using SOA to talk to each other - For this it would beneficial to use ESB and BPEL (ESB - To primarily serve as a communication medium between the hetrogenous systems and BPEL to overall orchestrate the process from end to end)
In this way you have all the disparate systems communicating and business running smooth through a SOA based process and in the mean time you start on the reverse engineering process of all the individual systems to migrate to the latest technologies (If there is a business need for the technology shift)
It would be really beneficial to you if you spend some time reading about the SOA and more than technology what exactly is the underlying goal of SOA and then understand what are all the various components of SOA to govern this architecture such as ESB, BPEL, BAM, Rules etc..,
Thanks
Shasikkumar
Edited by: Shasik on 08-Oct-2009 02:45
Edited by: Shasik on 08-Oct-2009 02:46

Zero Downtime Migration from Oracle to Sybase

Is there any way/ tool to migrate from oracle to sybase with Zero Downtime??
Thanks

Better answered on a Sybase forum I suppose...

Migration from Oracle to DB2 UDB on Unix

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