SAP HANA HA and DR Scenario Comparison

**Table 1** Scenario summary and comparison
Scenario	Deployment	Application Scope	Applicable SAP Scenario
Automatic Recovery of SAP HANA ECSs	Local deployment and HA	Single node/Cluster	Non-production scenario (development, test, training, and sandbox)
SAP HANA HA (System Replication + Preload on+ SUSE HAE)	Local deployment and HA	Single node/Cluster	Production scenario
SAP HANA HA (System Replication + Preload off)	Local deployment and HA	Single node/Cluster	Production and non-production scenarios
SAP HANA DR (System Replication)	Cross-AZ deployment and DR	Single node/Cluster	Production and non-production scenarios
On-Cloud and On-Premises SAP HANA DR (System Replication)	Cross-region deployment and DR	Single node/Cluster	Production scenario
Application Consistency Backup and Restoration	Cross-AZ deployment and DR	Single node	Non-production scenario (development, test, training, and sandbox)

**Table 2** Comparison between cost and reliability
Scenario	Additional Cost	RPO	RTO	Remarks
Automatic Recovery of SAP HANA ECSs	None	N/A	High	RPO is uncertain. RTO is high. Restart the ECS using cold migration.
SAP HANA HA (System Replication + Preload on+ SUSE HAE)	Medium N + N	0	Low	RPO = 0. The synchronization mode is used for data replication. RTO is in the minute level. The switchover between primary and secondary systems is automatic.
SAP HANA HA (System Replication + Preload off)	Medium N + N	≈ 0	Medium	RPO varies depending on the data replication mode and network status. RTO is high. (Decide the switchover policy. Manually perform the switchover and preload the data to the memory.)
SAP HANA DR (System Replication)	Medium to high N + 2N	≈ 0	Medium	RPO varies depending on the data replication mode and network status. RTO is high. (Decide the switchover policy. Manually perform the switchover and preload the data to the memory.)
On-Cloud and On-Premises SAP HANA DR (System Replication)	Medium N + N	> 0	Medium	RPO > zero. Generally, the asynchronization mode is used. RTO is high. (Decide the switchover policy. Manually perform the switchover and preload the data to the memory.)
CSBS Application Consistency Backup and Restoration	Low	> 0	High	RPO is uncertain. RTO is high. The application consistency backup uses the ECS restoration mechanism.