Question Re: Kernel upgrade on multiple Instances in Technology Q&A

Kernel upgrade on multiple Instances

former_member706793 — Thu, 12 Nov 2020 22:38:27 GMT

Hi, what is the procedure to update kernel on CI ( AIX) and multiple DI(Linux) ? Thanks

Re: Kernel upgrade on multiple Instances

S_Sriram — Fri, 13 Nov 2020 03:56:41 GMT

Could you share the current kernel release and sp level?

Regards

Re: Kernel upgrade on multiple Instances

manojsomkuwar — Fri, 13 Nov 2020 08:46:13 GMT

Hi,

Is the /sapmnt filesystem commonly shared across all application servers (CI+DIs)?

If yes, then the normal procedure of the kernel upgrade would be sufficient where we stop the system, copy the new media to global kernel directory, check if the kernel has been upgraded(you may randomly check any of the DIs as kernel should be upgraded here also if /sapmnt is shared), start CI, check if kernel has been upgraded or not , perform SGEN, and then continue to start other DIs.

Also, if your Database is oracle, you'll need to perform ./saproot.sh <SID> and ./oraroot.sh <SID>(depending on the database version) using root user after navigating to the kernel directory.

Please also let me know if there are any cluster services involved?

You can also log on to all of the application servers and execute below command to check the Kernel version for that specific instance.

sapcontrol -nr <NR> -function GetVersionInfo
^Make Sure sapstartsrv process is running for sapcontrol command to work.

Regards,

Manoj Somkuwar

Re: Kernel upgrade on multiple Instances

raquel_gomez — Fri, 13 Nov 2020 09:21:59 GMT

Hi,

For kernel upgrade check Note 19466-Downloading SAP kernel patches. It explains how to download SAP kernel patches, and covers different Kernel patch types.

The paper Update Strategy for the Kernel of the Application Server ABAP in On Premise Landscapes provides SAP recommendations on how to patch the SAP kernel.

See also wiki page: SAP Kernel Update on Unix and Linux.

Regards,
Raquel

Re: Kernel upgrade on multiple Instances

former_member706793 — Fri, 13 Nov 2020 14:08:00 GMT

thanks Manoj. How about AIX and Linux versions?

Re: Kernel upgrade on multiple Instances

former_member706793 — Fri, 13 Nov 2020 19:55:51 GMT

will check. thank you

Re: Kernel upgrade on multiple Instances

dasistdochscheisse — Fri, 20 Nov 2020 06:36:31 GMT

> How about AIX and Linux versions?

If /sapmnt is properly configured, there is a subdirectory for each needed os and the DI will copy the new kernel from there to the exe directory beneath /usr/sap/SID/D....