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This ensures that the database can be used even if a whole availability zone fails.

With Asynchronous replication, SAP HANA Cloud sends data over the network to another availability zone within the same region. Learn more about the availability zones on each infrastructure provider website : AWS, Azure, GCP.ĭisaster Recovery assumes that the primary site is not recoverable (at least for some time) and represents a process of restoring data and services to a secondary survived site. Regions are geographic locations in which public cloud service providers’ data centers reside.īusinesses choose one or multiple worldwide availability zones for their services depending on business needs. The goal of asynchronous replication is to ensure business continuity even in the case of a whole availability zone failing.Īvailability zones (AZs) are isolated locations within data center regions from which public cloud services originate and operate. With a Multi-Zone replication architecture, you can enable both Synchronous replication to the same availability zone, as well as Asynchronous replication to another availability zone within the same region. Multi-Zone Replication (Disaster Recovery architecture) The steps are described in the “Steps to use Database Replication” section of this blog. You can enable/disable replicas at any time using SAP HANA Cloud Central in a few minutes. If you enable the synchronous replica for the entire month, the System Availability SLA is 99.95% uptime.Īll details regarding the Service Level Agreements of SAP HANA Cloud and other platform services are available on the SAP Trust Center.

The system availability SLA of SAP HANA Cloud, SAP HANA database is 99.9% uptime. Single zone replication of SAP HANA Database in SAP HANA Cloud The replication mode ‘sync’ is used, where a commit on the source service is only confirmed if the related log is also persisted on the replica service.įail detection is autonomous: when the nameserver detects a fault in the primary database, the host automatically fails over to the replica. SAP HANA Cloud replicates all persistent data and changes to a secondary server in the same availability zone. The goal is to ensure database availability. With Single-Zone Replication, SAP HANA Cloud database offers a controlled synchronous replication with autonomous failover capability. Design a fault-resistant architecture for your organization Single-Zone Replication (High Availability architecture) Customers gain access to years of expertise amassed by SAP’s Cloud Operation teams in a few clicks. With SAP HANA Cloud, the whole installation is automated, continuously monitored and managed by SAP. What should the database do when several hosts are active but cannot talk to each other ? This problem is solved in SAP HANA Cloud via a third-party token check. It also takes weeks to test the robustness of the whole SAP HANA setup for enterprise-critical applications.įor example, when creating an automatic fail-over architecture, engineers have to consider split-brain scenarios. Of course, setting up SAP HANA System Replication and Host auto-failover on-premise requires an excellent understanding of the physical infrastructure : hardware setup, server setup, and networking. It supports a recovery point objective (RPO) of 0 seconds and a recovery time objective (RTO) measured in minutes.

With SAP HANA System Replication, customers running SAP HANA Platform on-premise can reduce outages due to planned maintenance, faults, and disasters. SAP HANA System Replication is the recommended mechanism to ensure the high availability of SAP HANA systems. The technology used to ensure maximum reliability of the synchronous replicas combines SAP HANA System Replication and the failure detection mechanisms of Host auto-failover. SAP HANA Cloud High availability and Disaster recovery options The SYNCHRONOUS and ASYNCHRONOUS replication architectures are illustrated. In the graph below, SAP HANA Cloud database is represented as a yellow box. With these options, you can set up a Highly Available (HA) architecture and/or a Disaster Recovery (DR) architecture in a few clicks. SAP HANA Cloud offers options to replicate your SAP HANA Cloud database synchronously within the same availability zone or asynchronously to other availability zones since October 2021.