From time to time it is necessary to update the kernel. But what about finding a maintenance schedule to stop and start the system with the new kernel? Tricky... That's why I became addicted to RKS. This article tells about my experience using it.
Getting started!
The first time I read about RKS I thought it was a complicated thing. I couldn't be right. Then I found the correct steps: the SAP Help page brings all the information to setup the use of the Rolling Kernel Switch.
It is very important to consider the recommendations for using RKS, even more in a system with a lot of application servers, logon groups, batch processing and spool settings.
My experience
After following the recommendations, the adoption of RKS was smooth.
Now it is only a matter of download a new kernel patch level, put in the central executable directory, and use SAPMMC interface:
Prerequisites:
Good to go:
Executing:
Timeout settings:
Checking:
Success:
Additional reading:
953653 - Rolling Kernel Switch
1104735 - Upgrade to the new Instance-Specific Directory on UNIX
2077934 - Rolling kernel switch in HA environments
IMPORTANT: CST Wiki!!!
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