In the single-node scenario where HA is required, active/standby switchovers can be manually performed, or automatically performed using scripts.
The concepts involved in this scenario are the same as those involved in Single-Node Scenario Where HA Is Not Required. The differences between the two deployment modes are as follows: Two independent SAP HANA nodes in the same AZ or different AZs are connected to the SAP HANA Studio for management. The two SAP HANA nodes synchronize data and implement HA using System Replication.
Figure 3 shows the deployment flowchart in the single-node scenario where HA is required.
Compared with the mode in which HA is not required in the single-node scenario, the mode in which HA is required has the following requirements:
This only applies to SAP HANA nodes running the OS SUSE Linux Enterprise Server 12 SP1 for SAP.