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Planning, Deployment, Maintenance And Operations Of SAP S/4HANABP-1209

Sören SchmidtSAP Solution Architect

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Agenda

1. Scope of the talk

2. What is SAP® S/4HANA?

3. Planning

4. Deployment

5. Maintenance

6. Operation

7. Things to look out for

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SUSE @ SAP LinuxLab

What is it about?

Focus of the talk: Operating system level

● No internals of SAP S/4HANA

● No details of the product SAP S/4HANA

● No migration hints or strategies towards SAP S/4HANA

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Just a simplified view

What Is SAP S/4HANA?

SAP HANA 2.0SAP Application Server (S/4HANA)

Operating System

Infrastructure

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PAM, Hardware Directory and important SAP Notes

Planning

Product Availability Matrixhttps://apps.support.sap.com/sap/support/pam

Hardware Directoryhttps://www.sap.com/dmc/exp/2014-09-02-hana-hardware/enEN/appliances.html

SAP Notes● 2369910 - SAP Software on Linux: General information

https://launchpad.support.sap.com/#/notes/2369910

● .. a lot more

https://apps.support.sap.com/sap/support/pamhttps://www.sap.com/dmc/exp/2014-09-02-hana-hardware/enEN/appliances.htmlhttps://launchpad.support.sap.com/#/notes/2369910

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HA - to be on the safe side

Planning

Several HA solutions availablehttps://documentation.suse.com/#sles-sap (→ choose Service Pack → “Best Practices”)

● For SAP Applications Server (S/4 HANA)● For SAP HANA ● Availability depends on the product (SLES/SLES for SAP Applications)

Best let’s speak our HA experts about it:

TUT-1226 - “SAP HA on SUSE: All you need to know”

https://documentation.suse.com/#sles-sap

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OS - Which one to take?

Planning

SUSE® Linux Enterprise Server (SLES)https://www.suse.com/products/server/

SUSE® Linux Enterprise Server for SAP Applications (SLES4SAP)https://www.suse.com/products/sles-for-sap/

FUT-1439 - “SUSE Linux Enterprise Server for SAP Applications”

https://www.suse.com/products/sles-for-sap/

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Life Cycle

Planning

Life Cycle: https://www.suse.com/lifecycle/

● Check End of Life of your chosen product

● Don’t forget to check support with SAP and your infrastructure vendor

● Update your system regularly!

https://www.suse.com/lifecycle/

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How to get the software on the infrastructure?

Deployment

Installation Wizard (SLES4SAP)

AutoYaST

Deployment Project● Based on Salt and Terraform● Partly or fully automated deployments for Azure, AWS, KVM

• SAP HANA / SAP NetWeaver (with cluster)• S/4HANA

TUT-1092 - “Bootstrapping SLES for SAP HANA & NetWeaver clusters with Terraform & Salt on public clouds”

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SAP Notes

Configuration

SAP Note● Don’t confuse with KBAs● Recommendations, not rules

Some important SAP Notes (OS related):SAP Note 2235581 - SAP HANA: Supported Operating Systems

SAP Note 1984787 - SUSE LINUX Enterprise Server 12: Installation notes

SAP Note 2205917 - SAP HANA DB: Recommended OS settings for SLES 12 / SLES for SAP Applications 12

SAP Note 2578899 - SUSE LINUX Enterprise Server 15: Installation notes

SAP Note 2684254 - SAP HANA DB: Recommended OS settings for SLES 15 / SLES for SAP Applications 15

...

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sapconf/saptune

Configuration / Maintenance

sapconf (SLES)● Does the needful● Stays as simple as it is

saptune v2 (SLES4SAP)

● More advanced● SAP Notes and Solutions● Check of current settings● Configurable (Own Notes)

● Development goes on● Scripting interface● Machine-readable output ● Cloud and HA awareness● ...

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Golden Rules

Maintenance

Keep SAP software up-to-date

Keep Operating System up-to-date

Keep infrastructure up-to-date

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Golden Rules

Operations

Monitor your systems● Monitor logs and system health● Monitoring Project (Prometheus/Grafana)

CAS-1088 - ”Monitoring your HA and SAP HANA clusters with Prometheus and Grafana ”

● Collect sar data

● Size your logging and backup your log files

Backup your systems● You do backups, don’t you?

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In case you need support

Operations

Open a SAP Incident● Why not a SR?● One is really enough

Prepare information● Meaningful description● What has been changed prior to the incident?● What happened, when and why before/during/after the incident?● supportconfig + hb_report

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What is different when running SAP?

Things to look out for

HDBLCM● Reads and changes sysctl.conf

SAP HostAgent● Changes e.g. net.ipv4.ip_local_port_range/net.ipv4.ip_local_reserved_ports

systemd Issues● Database gets killed at shutdown

● sapinit still a SysV init script

Swapping ● Not bad necessarily, but: Page Cache Limit / Workload Memory Protection

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General Disclaimer

This document is not to be construed as a promise by any participating company to develop, deliver, or market a product.  It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions.  SUSE makes no representations or warranties with respect to the contents of this document, and specifically disclaims any express or implied warranties of merchantability or fitness for any particular purpose.  The development, release, and timing of features or functionality described for SUSE products remains at the sole discretion of SUSE.  Further, SUSE reserves the right to revise this document and to make changes to its content, at any time, without obligation to notify any person or entity of such revisions or changes. All SUSE marks referenced in this presentation are trademarks or registered trademarks of SUSE, LLC, Inc. in the United States and other countries.  All third-party trademarks are the property of their respective owners.