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Linux And High Availability Go Hand In Hand
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Linux And High Availability Go Hand In Hand

If SAP infrastructures or their components malfunction or stop working altogether, SAP-supported processes are also at risk. A comprehensive Linux package includes a High Availability functionality.

SAP core infrastructure components like servers (including VMs, storage, databases, and operating systems like Linux) or networks have a high level of technological maturity and take care of SAP-related tasks. It sometimes does happen that the IT department has to step in if business-critical applications like S/4 malfunction or stop working altogether because of faulty SAP infrastructure components.

High Availability is therefore an important topic for IT and SAP decision makers to ensure business continuity. SAP partners are usually the ones responsible for implementing HA solutions for customers.

What’s Linux got to do with HA?

Suse offers a High Availability Extension (HAE) including disaster recovery (DR) for Hana on Linux – meaning Hana on Suse Linux Enterprise Server for SAP Applications (SLES for SAP). Additionally, Suse offers DR functionalities for AnyDB customers as well.

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More and more companies using Hana and SLES for SAP Applications also leverage Suse HAE. It’s a complete HA package based on open source and can be implemented free of charge as part of a SLES for SAP subscription. Consequently, customers do not need to invest in additional cluster resource management solutions.

Numerous SAP customers switching to Hana or Hana-based applications like S/4 replace existing HA solutions with Suse HAE. With Suse’s solution, they are able to optimize high availability and minimize potential downtimes significantly.

HAE as part of SLES for SAP Applications is based on an open source solution called Pacemaker (successor to Heartbeat 2). Suse has been and continues to be closely involved with Pacemaker’s development.

By the way, HAE is integrated with SAP’s management system (SolMan), just like Suse Linux Enterprise Server for SAP Applications.

Hana System Replication

A central component of the Hana HA concept is Hana System Replication (SR). In general, SR is done manually. If SR is automated, customers experience several benefits, one of them a service level agreement improvement. For example, a German company was able to reduce system recovery time from 45 minutes to 5 minutes.

Hana Resource Agents, integrated in SLES for SAP Applications and jointly created by Suse and SAP, can help with that as well. They are optimally equipped to administer and manage Hana database instances and replications. First available in SLES 12 for SAP Applications, Hana Resource Agents efficiently support intelligent and simplified cluster configurations.

In conclusion, Suse’s High Availability Extension is a powerful, tried-and-tested HA solution. It helps improve business continuity and disaster recovery for SAP solutions.

Source:
E-3 Magazine December 2019/January 2020 (German)

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