Three-tier model and components of a SAP S/4 HANA installation
Required SAP processes to build an instance
How processes can proceed in parallel (scalability)
What a Central Instance is
What enqueues and exclusive locks are
What enqueue replication is
The difference between ENSA1 and ENSA2
Overview of ASCS, AS, PAS, AAS, and databases, and which VIPs are used
How to configure the Pacemaker cluster for high availability of SAP application services
Troubleshooting section, and how to monitor an enqueue table
Because the SAP application layer is transaction-based with its own locking mechanism, multiple application servers can work concurrently on objects that are locked exclusively in the event of updates.
The benefit of rollback if a transaction is not executed