Architect SAP on Azure
Standalone HANA deployment:
A single node installation of the SAP HANA DBMS is the most common scenario.
The database is installed on either SUSE Linux Enterprise Server or Red Hat Enterprise Linux.
For production workloads, only certified Azure VMs must be used, but for non-production workloads, non-certified VMs can be used, which may offer lower cost and also provide options with less memory; the smallest certified VM is currently 192 GB.
Multiple separate databases can be deployed together on a single server
Additional effort is required to manage the system and ensure that the performance of one database is not affected by others
Keeping multiple database instances on the same virtual machine is not recommended for a production workload
MDC provides much greater isolation between the individual databases, making it much more secure and robust than MCOD
MDC is SAP's preferred solution for virtualizing HANA
It is not possible to patch or upgrade the HANA version for a single database container
MDC can be a cost-efficient way to host small HANA databases
SAP BW on HANA, BW4/HANA
SAP HANA used for OLAP outside SAP applications
SAP HANA scale-out architecture comprises:
A master node
One or more worker nodes that hold the majority of the data. As the database grows you can add additional worker nodes to increase the available
Optional standby node(s), there can be one or more, which provide a high availability solution.
In the event of the failure of the master node or one of the worker nodes, then the standby node can take over its role
The standby node needs access to all database volumes.
The HANA volumes must be mounted as NFSv4 volumes.
The improved file lease-based locking mechanism in the NFSv4 protocol is used for I/O fencing.
To provide HA for SAP HANA scale up, the recommended solution from SAP is to use HANA System Replication (HSR) in synchronous mode
The main use case for Azure HLI is where your application requires a single HANA instance of more than 12 TB (11.4 TB)
A HLI environment is certified up to 20 TB and can support up to 24 TB under the HANA TDIv5 rules