How to change name of application server (SAP SID) in the backup restore .

[Former Member]

Hi All,

For upgrade purpose, we need to set up a system which will be a copy of development sysetm. Now as decided we will copy database with backup resotre method of system copy and the oracle dba will restore it on a new hardware with different db-id.

But we also need to have SAP application server (ci) on on that new hardware with some different sap id (i.e. different from development system and same as database id).

Can we do it by copy the existing relevant directories from existing development system and then rename the directories and sap sid on the new hardware ? Is it possible ? If yes how to do it and if NO is there any other solution.

Please help.

Thanks

Deepak

[Former Member · Accepted solution]

Hi,

I can give you some high level idea for this. (considering Oracle as DB)

1. Get all the file systems of SAP and DB copied from the source to target system. This should have oracle binaries, datafiles,cofiles, online redologs and offline redo logs to an extent, SAP kernel and other SAP file systems like /usr/sap/trans,DVEBMGSXX, etc., and also migrate environment vairables of sidadm and orasid users.

2. Check if all file systems to have a new SID

3. Change listener.ora,tnsnames.ora and change orasid user environment vairalbes.Change global SID details.

4. Drop and create OPS$ users.

4. Start Listener and DB Perform recovery if required and open the database using reset logs

5. Change environment variables (of sidadm user and profiles for SAP to point to new SID.

6. Start SAP.

I was successful in brining up SAP in this process, however I am not sure of support from SAP for this procedure.

Regards,

Gopal

[JPReyes]

Read the Homogeneous system copy guide all the info you need is there. You can change the SID while doing a system copy.

Regards

Juan

[Former Member]

Hi Juan,

Thanks for the reply.

Yes, I gone through the guide and come to know that we can change the SAP SID while installation of Application server.

But Will it work if i copy the binaries and sap profiles,user profile,etc which are required for new application server from my existing development system and rename them as per requirement (i.e for new application server)?

and if above copying is not a good idea , what are the activities/things that i need to do to keep my newly installed application sever at par with the existing development system (i.e. other than the system copy follow-up activities. Both the existing development system and newly installed application server must be same in all the respect).?

Thanks

Deepak

[JPReyes]

You can certainly use your current profiles as a template if both boxes have similar specs... but the rest will be created by SAPINST during the Homogeneous system copy.

and if above copying is not a good idea , what are the activities/things that i need to do to keep my newly installed application sever at par with the existing development system (i.e. other than the system copy follow-up activities. Both the existing development system and newly installed application server must be same in all the respect).?

Considering you are testing the upgrade with a copy of development I don't see a reason to match both boxes... I guess you just want to test the flow of the upgrade and the potential threads in the process.

If you want to test upgrade performace I would build a box with similar specs than production an do a copy of production.... Why?... It will give you a more accurate idea of the issues you might face as well as the timings so you can plan ahead your downtime.

Regards

Juan