Service continuity is ensured from the aspect of automatic service restarting, HA, and backup based on public cloud and SAP HANA capabilities.
SAP HANA provides the reliability mechanism. Its Daemon process monitors other SAP HANA processes, including the NameServer, IndexServer, Preprocessor, Complieserver, Statisticsserver, and Xsengine processes. When an SAP HANA process becomes faulty, the system automatically restarts the process.
In single-node deployment:
In cluster deployment:
SAP HANA provides host auto failover (HAF). When a worker node in the cluster becomes faulty, the system automatically switches services from the faulty node to the standby node for cluster HA.
The following backup modes are supported:
This backup mode adapts to the SAP HANA backup mechanism. Two SAP HANA nodes (NFS servers) constitute an HA NAS system. SAP HANA data is backed up to the backup volume. Then, the data can be backed up to OBS buckets.