CONVERSION SIZING
Muhammad Arshad
SAP GRC | SAP Technical Architect | OS/DB Migration Public /Private Cloud/On-Prem | SAP Rise | PCOE | S/4 Conversion | BTP | SAP CPI | Security | Solman | FIORI | SAP HANA | SAP S/4 HANA | SAP ALM | Cybersecurity
S4HANA Upgrade Sizing
This article will provide comprehensive insights into the options and tools available for sizing SAP S/4HANA, both for new installations and upgrades. It aims to address key questions related to the sizing process and provide a clear understanding of how to execute memory, CPU, and disk storage sizing for S/4HANA.
Executing S/4HANA Sizing:
To determine the appropriate sizing for S/4HANA, you can utilize the SAP-specific tool called the S4HANA Quick Sizer. This tool is applicable to both greenfield (new) installations and existing ECC systems. You can access the S4HANA Quick Sizer from the provided link and initiate the tool:
While the term "quick sizing" might imply a simple process, it's important to note that the tool is quite advanced and requires a substantial amount of input to generate accurate sizing recommendations.
How to fill the quick sizer is explained in OSS note?2467172 – How to size Fiori applications based on the number of users.
Memory Sizing for Upgrading Existing Systems:
For upgrading an existing ECC system to S/4HANA, SAP has introduced a useful tool to assist with memory sizing. To begin, apply the OSS note 1872170 – Business Suite on HANA and S/4HANA Sizing Report in your current ECC system. This note will make available the ABAP report /SDF/HDB_SIZING. It's recommended to initially test this report in a development system and subsequently transport it to the production environment for actual sizing calculations.
Best to execute in the background. You can then get the results in the spool of the batch job.
The results give an as good as possible estimation of memory sizing after the database conversion.
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CPU sizing for S/4HANA
More details on CPU sizing can be found in?OSS note?1793345 – Sizing for SAP Suite on HANA.
Disk space sizing for S/4HANA
Disc space storage sizing for S/4HANA depends on data aging please see below notes
OSS notes
Before running the /SDF/HDB_SIZING program it is best to update it with the most recently available updates:?3104284 – HANA memory Sizing report – Advanced correction 15 or higher?and?3149498 – HANA memory Sizing report – Advanced correction 16.
In conclusion, this article aims to demystify the process of sizing S/4HANA, offering guidance on executing memory, CPU, and disk storage sizing for both new installations and upgrades. The S4HANA Quick Sizer tool plays a pivotal role in this process, and for existing system upgrades, the application of the specified OSS note and subsequent report usage can greatly aid in memory sizing. While the term "quick sizing" may not fully encapsulate the detailed nature of the process, these tools and steps contribute significantly to achieving accurate and optimized S/4HANA sizing results.
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