This use case addresses key points that help define your CRG. Two-socket or four-socket OLTP scale-up systems can have a virtual machine with as little as eight vCPUs and 128 GB of RAM, or a maximum of 224 vCPUs and 6 TB of RAM. See SAP Note 2779240: Workload-based sizing for virtualized environments (access requires SAP user credentials). This scenario assumes that a two-socket blade is used and that the number of vCPUs is greater than eight.
For an SAP HANA system of 2 TB, we recommend populating two DIMM memory banks, the first with 24 DIMMs of 32 GB and the second with 24 DIMMs of 64 GB. This configuration creates a CRG with a four-socket MX blade that has 2,304 GB of memory for the SAP HANA database.
SAP HANA is Atomicity, Consistency, Isolation, Durability (ACID)-compliant. All transactions must be acknowledged at the persistence layer to ensure transaction durability. Although SAP HANA is an in-memory database, performance is dependent to some extent on the ability to quickly save transactions to storage. Reserving the fastest possible storage for the database ensures fast performance in saving committed transactions to storage. In addition, database restart times and data load times are accelerated with the fastest storage media.
Knowing these requirements, the PowerOne administrator can quickly create a CRG for a production SAP HANA database. The CPU, memory, and storage are dedicated to the SAP HANA database. No other CRGs can use the same resources, which prevents other applications from affecting our SAP HANA database. SAP recommends the following best practices with vSphere 6.5 and 6.7 in production systems:
For more information, see SAP Note 239317: SAP HANA on VMware vSphere 6.5 and 6.7 (access requires SAP user credentials).
SAP HANA sizing is critical before you create a CRG for the production database. The Dell Technologies team of SAP experts can assist with sizing, enabling you to get started quickly with creating your first CRG. If the first attempt produces configuration problems, removing and restarting the process is easy. This flexibility to intelligently provision a dedicated environment for SAP HANA is what makes the PowerOne system a strong choice for private clouds.