PROPER SYSTEM SIZING

When implementing a new SAP S/4HANA system or converting an existing SAP ERP system to SAP S/4HANA, there are important considerations related to system sizing that differentiate it from traditional ERP systems.

This difference stems from the unique characteristics of SAP HANA, which stores data in random-access memory (RAM) and utilizes advanced data compression techniques resulting in significant data reduction.

Specifically, SAP HANA's data architecture and embedded data compression algorithms typically achieve compression rates of three to five times the original data volume. This means that, as a rule of thumb,

Random-access memory = twice the compressed data volume

As a rule of thumb, SAP recommends calculating twice the compressed data volume for the RAM volume. when determining the hardware requirements for your SAP S/4HANA system.

The sizing process for SAP S/4HANA systems is closely tied to the use of SAP HANA as the underlying database, and it differs from traditional database sizing methodologies. To accurately determine your sizing requirements, SAP suggests running a sizing report within your existing SAP ERP systems to factor in variables like the achievable compression rates and other specific conditions unique to your environment. You can find more detailed information on sizing by visiting the SAP sizing page at https://service.sap.com/sizing.

In summary, the integration of the SAP HANA database is intricately linked to the implementation of application functions within SAP S/4HANA, which sets it apart from databases used in previous ERP systems.

This close relationship is essential to fully harness the advantages offered by SAP HANA. Consequently, SAP S/4HANA is currently exclusively available for use with SAP HANA as its database, as the in-memory databases offered by third-party providers often employ different approaches and necessitate alternative implementations.

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