Help Center/ SAP Cloud/ SAP HA and DR Guide/ SAP HANA HA and DR/ Public Cloud HA and DR Scenarios/ SAP HANA Cluster HA (Host Auto-Failover)
Updated on 2022-03-04 GMT+08:00
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SAP HANA Cluster HA (Host Auto-Failover)

Scenarios

The public cloud supports the SAP HANA cluster mode, which has the HA capability ensured by the configured standby nodes and the automatic switchover function (Host Auto-Failover).

  • Standby nodes are configured for the SAP HANA cluster to implement automatic switchover. When any node in the cluster fails, the SAP HANA automatically triggers a switchover. The switchover does not cause data loss (RPO = 0).
  • A single standby node can only recover the fault of a single node at one time. It is recommended to configure multiple standby nodes for an SPA HANA cluster with over eight nodes.
  • The public cloud supports anti-affinity deployment of the SAP HANA cluster. ECSs in the same SAP HANA cluster are deployed on different physical servers to ensure HA.
  • Currently, the public cloud supports a maximum of eight nodes (7 worker nodes and 1 standby node) in an SAP HANA cluster.

Advantages

The SAP HANA cluster HA is easy to be deployed and cost-effective based on its HA mechanism and Huawei public cloud capabilities.

Before enabling the HA automatic switchover function of an SAP HANA cluster, disable the automatic recovery function of the ECSs in the cluster.

Deployment Plan

Figure 1 shows the deployment plan.

Figure 1 SAP HANA cluster HA (Host Auto-Failover)