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PowerEdge for VMware vSAN Ready Nodes are generally available with one, two, and four CPU sockets. However, SAP HANA is certified only on dual-socket and quad-socket PowerEdge vSAN Ready Nodes appliances with Intel Xeon-SP (2nd and 3rd generation) Platinum, Gold, or Silver CPUs with at least 12 cores per socket.
The minimum size of a virtual SAP HANA instance is a half-socket (represented by at least eight physical cores) and 128 GB of RAM. Half-socket SAP HANA configurations, where two SAP HANA virtual machines share a single CPU socket, require a minimum of 16 cores per socket.
To understand the CPU and memory considerations and the SAP HANA limitations on vSphere 7.0x, see SAP Note 2937606: SAP HANA on VMware vSphere 7.0 in production.
Note: When using Intel Ice Lake CPUs with more than 32 cores and with hyperthreading enabled, the correct number of CPUs might not be shown because of a limitation of the VMware hypervisor. For more information, see the VMware knowledge base article: Supportability clarification for VMware SAP HANA on 32+ core CPUs (89881)
When configuring memory for vSAN Ready Nodes for SAP HANA, ensure that the configuration complies with the SAP requirement for a symmetric, homogeneous DIMM assembly. Also ensure that all memory channels are used with Intel Xeon-SP CPU architecture. Mixed DIMM configurations are not supported on vSAN Ready Nodes.
Because of the strict SAP requirement for a symmetric, homogeneous DIMM assembly, memory sizes such as 1,024 GB or 2,048 GB are not possible with the Intel Xeon-SP CPU 2nd Gen architecture (Cascade Lake), and 768 GB and 1,536 GB are not possible with the Intel Xeon-SP CPU 3rd Gen architecture (Ice lake) architecture.
Nonuniform memory access (NUMA) node sharing, which is the sharing of CPU sockets between SAP HANA VMs, is supported on dual-socket and quad-socket PowerEdge vSAN Ready Nodes. Only two production SAP HANA VMs per socket (half-socket) are allowed.
With the NUMA architecture, each processor has its local memory and can also access the nonlocal memory of the other processors over an advanced memory controller. Even with a high-performance connection, access to local memory is always faster than access to the nonlocal memory of the other processors, however. Take this difference into account when designing and configuring SAP HANA VMs under vSphere on PowerEdge vSAN Ready Nodes.
The supported DIMM/memory configurations for R840 vSAN Ready Nodes are shown in green in the following figure:
The supported DIMM/memory configurations for R740xd vSAN Ready Node are shown in green in the following figure:
The supported DIMM/memory configurations for R840 vSAN Ready Nodes are shown in green in the following figure: