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Doubt in System refresh from EHP8 system to EHP4 system

Jan 24, 2017 at 03:11 PM

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Former Member

Hello All,

Customer wants to perform system refresh from TEST (its in EHP8) to sandbox system(its in EHP4). Please let us know how to proceed this.

In EHP8 we have ASCS instance but in EHP4 we dont have the ASCS instance.

Do we need to create a filesystem "ASCS" in Sandbox and copy the ASCS profile of Test system to that location

Do we need to copy the profiles of test box to sandbox?
Do we need to copy the test kernel to sandbox?

Regards

Subbu

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4 Answers

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Former Member Jan 24, 2017 at 06:17 PM
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Hi,

It's not a system refresh, but building a new system.

System refresh restores only database so that existing executables (Kernel) and profiles of old system can be used as it is.

In this scenario, you need to restore DB and then copy Kernel and profile parameters from source to target then make necessary changes to bring the system up.

Regards,

Harish Karra

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Reagan Benjamin
Jan 24, 2017 at 10:32 PM
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You need to follow the standard Homogeneous system copy procedure using the SWPM tool. The DB refresh will only replace the target system DB. EHP8 based systems need a higher release of the SAP kernel so you will need a new set of kernel that supports the EHP8 based system. Also there is a possibility that the target system might be still using the START profile which is now clubbed with the INSTANCE profile in the newer releases. You do not need a separate filesystem for the ASCS. You can just extend the /usr/sap/SID filesystem with additional 2 GB or more space. Technically it is possible to set up the system on AIX / Linux by copying the files from the source to the target and modifying the profiles. But if you want to avoid all the manual work then the best is to run the SWPM tool to setup the target system.

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Hans-Hendrik Weise
Jan 25, 2017 at 07:10 AM
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I also want to add that you cannot do this across releases.

It's not to perform a system copy between an EhP8 and EhP4 system.

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Matt Fraser
Jan 26, 2017 at 05:17 PM
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Subbu,

In this case, the safest and probably simplest approach would be to delete the existing EhP4 sandbox system, and then use the homogeneous system copy to install a new EhP8 system using the database backup (or export, but probably backup) from your source test system. Just follow the system copy guide carefully. The SWPM process should take care of considerations like the ASCS, etc. You may need to adjust the kernel patch level afterwards so that it matches what you have in your source system, and you'll almost certainly need to adjust the default and/or instance profile (because SWPM will install them with default settings). That does not mean copy the profile from the source system; a better option would be to modify the newly created profiles as appropriate.

Cheers,
Matt

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