High availability refers to a system or application's ability to remain operational and accessible to users, even in the event of hardware or software failures, network outages, or other disruptions. 

Organizations that run mission-critical applications on SAP® systems must ensure that their production systems and applications are always available when needed, and that any downtime is minimized.

Red Hat®  HA Solutions for SAP  Applications offers a range of solutions for creating highly available SAP environments using the Red Hat Enterprise Linux high availability cluster framework.

The IBM®  Power®  Virtual Server for SAP documentation site provides detailed instructions for implementing various HA scenarios for SAP applications using Power Virtual Server instances.

For more information on the documented scenarios, refer to the overview document at

Implementing High Availability for SAP Applications on IBM® Power® Virtual Server | IBM Cloud Docs

It is important to note that these instructions can also be used for on-premises deployments, with the main difference being the installation and configuration of a different fencing agent.