Single-node deployment is usually applied in OLTP scenarios. You can choose the HA configuration as required.
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 Deployment 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.
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.
The requirements for each node are the same as those described in Requirements on SAP HANA Nodes.
Other nodes include the NAT server and SAP HANA Studio nodes. For details, see Requirements on Other Nodes.
For instructions about how to create ECSs or HANA ECSs on the management console and install the SAP HANA software on the ECS or HANA ECS, see the SAP HANA User Guide (Single-Node Deployment).For instructions about how to create ECSs or HANA ECSs using an API and manually install the SAP HANA software on the ECS or HANA ECS, see the SAP HANA User Guide (API).