SAP on IBM i Kernel Maintenance · 2019-11-12 · 3. Restart the SAP System Benefits • The complete SAP Kernel is updated with one single command • Updating the SAP Kernel is

SAP on IBM i

Kernel Maintenance SAP on IBM i Development, October, 2013

© 2013 SAP AG. All rights reserved. 2 Customer

The information in this presentation is confidential and proprietary to SAP and may not be disclosed without

the permission of SAP. This presentation is not subject to your license agreement or any other service or

subscription agreement with SAP. SAP has no obligation to pursue any course of business outlined in this

document or any related presentation, or to develop or release any functionality mentioned therein. This

document, or any related presentation and SAP's strategy and possible future developments, products and

or platforms directions and functionality are all subject to change and may be changed by SAP at any time

for any reason without notice. The information in this document is not a commitment, promise or legal

obligation to deliver any material, code or functionality. This document is provided without a warranty of any

kind, either express or implied, including but not limited to, the implied warranties of merchantability, fitness

for a particular purpose, or non-infringement. This document is for informational purposes and may not be

incorporated into a contract. SAP assumes no responsibility for errors or omissions in this document, except

if such damages were caused by SAP´s willful misconduct or gross negligence.

All forward-looking statements are subject to various risks and uncertainties that could cause actual results

to differ materially from expectations. Readers are cautioned not to place undue reliance on these forward-

looking statements, which speak only as of their dates, and they should not be relied upon in making

purchasing decisions.

Legal disclaimer


1. SAP Kernel =7.0x Maintenance

2. SAP Kernel ≥7.2x Maintenance

Agenda


Key Principles

• The SAP Kernel 7.0x consisted of a kernel library and a kernel directory

• The kernel directory was created/updated from the kernel library (“library-centric”)

• The name of the kernel library in an SAP Kernel 7.0x was free of choice

• To activate a kernel library for an SAP System it had to be registered

Please notice:

SAP Kernels 7.0x (& SAP Kernels 7.1x) are out of maintenance since 09/2012.

Please use downward compatible SAP Kernels 7.2x instead.

SAP Kernel 7.0x Maintenance



Kernel Update Procedure

1. The SAP System is running with SAP Kernel <krn> (<krn-lib>, <krn-dir>)

2. Use CPYLIB to duplicate the kernel library <krn-lib> to <krn-lib-new>

3. Run LOADSAPKRN resp. APYR3FIX to apply the update to <krn-lib-new>

4. Use CPYLIB to replicate <krn-lib-new> to all remote system instances

5. Stop the SAP System

6. Run APYSAP on all system instances to register <krn-lib-new> and to update

the kernel directory

7. Start the SAP System

Benefits

• Updating the kernel library is done on a duplicate and happens during uptime

(may take some time depending on the size of the update)

• The exact physical copy of the updated kernel library can be tested beforehand

• A before image backup of the kernel library is implicitly available



Kernel Disaster Recovery

1. The SAP System using the updated SAP Kernel <krn> (<krn-lib-new>, <krn-dir>)

does not come up or does not work properly


3. Run APYSAP an all system instances to register the formerly working kernel

library <krn-lib> and to update the kernel directory



Key Principles

• The SAP Kernel consists of a kernel library and a kernel directory

• The kernel library is created/updated from the kernel directory (“directory-centric”)

• The name of the kernel libraries and kernel directories of an SAP System is

always predefined (therefore it doesn’t need to be registered):

• Without SAPCPE:

• The kernel directory is /sapmnt/<SID>/exe

• The kernel libraries are SAP<SID>IND

• With SAPCPE:

• The kernel directory /sapmnt/<SID>/exe and the kernel libraries SAP<SID>IND

serve as the kernel “staging area” and for interactive use by <sidadm>

• The instance kernel directories are /usr/sap/<SID>/<services><nn>/exe

(<services>∈{DVEBMGS, ASCS, SCS, D, J} and <nn> is the instance number)

• The instance kernel libraries are SAP<SID>I<nn>

SAP Kernel ≥7.2x Maintenance



Kernel Update Procedure without SAPCPE

1. The SAP System is running with the original SAP Kernel


3. Run APYSIDKRN to apply the update to the SAP Kernel


Benefits

• The complete SAP Kernel is updated with one single command

• The kernel libraries of remote system instances are automatically synchronized

• A backup of the original SAP Kernel is automatically generated and stored

Drawbacks

• Updating the SAP Kernel happens during downtime




Kernel Update Procedure with SAPCPE (see SAP Note 1632754)

1. The SAP System is running with the original SAP Kernel

2. Run APYSIDKRN to apply the update to the SAP Kernel in the staging area

3. Restart the SAP System

Benefits

• The complete SAP Kernel is updated with one single command

• Updating the SAP Kernel is prepared in the kernel staging area during uptime


• The kernel libraries of remote system instances are automatically synchronized

• A backup of the original SAP Kernel is automatically generated and stored

• There is no manual activity required between stopping and starting the system

Please notice: Kernel Update using SAPCPE is the recommended procedure.



Kernel Disaster Recovery

1. The SAP System using the updated SAP Kernel does not come up or does not

work properly


3. Run APYSIDKRN in mode *FULLY with the backup of the original SAP Kernel to

restore its formerly working kernel



© 2013 SAP AG. All rights reserved.

No part of this publication may be reproduced or transmitted in any form or for any purpose without the express permission of SAP AG.

The information contained herein may be changed without prior notice.

Some software products marketed by SAP AG and its distributors contain proprietary software components of other software vendors.

National product specifications may vary.

These materials are provided by SAP AG and its affiliated companies ("SAP Group") for informational purposes only, without representation or

warranty of any kind, and SAP Group shall not be liable for errors or omissions with respect to the materials. The only warranties for SAP Group

products and services are those that are set forth in the express warranty statements accompanying such products and services, if any. Nothing

herein should be construed as constituting an additional warranty.

SAP and other SAP products and services mentioned herein as well as their respective logos are trademarks or registered trademarks of SAP AG in

Germany and other countries.

Please see http://www.sap.com/corporate-en/legal/copyright/index.epx#trademark for additional trademark information and notices.

http://www.sap.com/corporate-en/legal/copyright/index.epx




© 2013 SAP AG. Alle Rechte vorbehalten.

Weitergabe und Vervielfältigung dieser Publikation oder von Teilen daraus sind, zu welchem Zweck und in welcher Form auch immer, ohne die

ausdrückliche schriftliche Genehmigung durch SAP AG nicht gestattet. In dieser Publikation enthaltene Informationen können ohne vorherige

Ankündigung geändert werden.

Einige der von der SAP AG und ihren Distributoren vermarkteten Softwareprodukte enthalten proprietäre Softwarekomponenten anderer

Softwareanbieter.

Produkte können länderspezifische Unterschiede aufweisen.

Die vorliegenden Unterlagen werden von der SAP AG und ihren Konzernunternehmen („SAP-Konzern“) bereitgestellt und dienen ausschließlich zu

Informationszwecken. Der SAP-Konzern übernimmt keinerlei Haftung oder Gewährleistung für Fehler oder Unvollständigkeiten in dieser Publikation.

Der SAP-Konzern steht lediglich für Produkte und Dienstleistungen nach der Maßgabe ein, die in der Vereinbarung über die jeweiligen Produkte und

Dienstleistungen ausdrücklich geregelt ist. Keine der hierin enthaltenen Informationen ist als zusätzliche Garantie zu interpretieren.

SAP und andere in diesem Dokument erwähnte Produkte und Dienstleistungen von SAP sowie die dazugehörigen Logos sind Marken oder

eingetragene Marken der SAP AG in Deutschland und verschiedenen anderen Ländern weltweit. Weitere Hinweise und Informationen zum

Markenrecht finden Sie unter http://www.sap.com/corporate-en/legal/copyright/index.epx#trademark.




Documents

SAP on IBM i Kernel Maintenance · 2019-11-12 · 3. Restart the SAP System Benefits • The complete SAP Kernel is updated with one single command • Updating the SAP Kernel is