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Owner	MUTHUSAMY-ext, Kunalan
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Introduction

Purpose

The purpose of the document is to outline the application architecture of S/4HANA instance deployed in Europe region.

Scope & Objectives

This document describes the high-level architecture design for S/4HANA and the supporting systems that are deployed together in the RISE environment. It will cover the following topics:

Landscape overview
Application and components
Application security and access
Operational architecture

Out of scope:

Detailed architecture designs that are managed by SAP RISE.
RISE operating model.

Key Decisions and Requirement

Description	Rationale
SAP Private Cloud deployment model was selected for S/4HANA deployment	Please refer to KDD026 - SAP S/4HANA Deployment Model.
SAP GTS will be co-deployed with S/4HANA as a separate client.	Please refer to KDD074 - Architecture of SAP GTS
Embedded Fiori deployment model - SAP Fiori front-end server is deployed on S/4HANA	S/4HANA will be the only backend system for Fiori and there is a strict dependency between Fiori and S/4HANA version. Hence an embedded deployment will be preferred and it also optimizes hosting and maintenance costs. Embedded deployment option is also recommended for S/4HANA by SAP.
SSL and SNC will be configured for S/4HANA to encrypt web and RFC traffic	Synesqo cybersecurity requires all data in transit to be encrypted.
Configure SSO for S/4HANA	As part of SyWay project, a common authentication mechanism (e.g., SAML) will be adopted for ease of access and unified user experience.
99.9% SLA	Based on Syensqo existing non-functional requirements.

Application Architecture

Overview

SAP RISE application architecture is represented in the diagram below.

SAP RISE Details

The table below summaries SAP RISE details.

Customer SID	YSQ
Customer Number	3008440
Installation Number	21360356
S-User for PCE	S0026961840
Cloud Provider	Azure
Cloud Region	North Europe (Ireland - Dublin)
Planned Downtime	First Tuesday each month, 15:00 - 19:00 UTC

Application Architecture Components

S/4HANA

SAP S/4HANA is an enterprise resource planning solution based on SAP HANA database and ABAP platform. It is a core component in the SyWay landscape and SAP Fiori and GTS components will be co-deployed.

The table below lists down the different components within a S/4HANA instance.

Component	Description
SAP Central Services (SCS)	SCS system comprises of message server and enqueue server : Message Server: Facilitates communication between different application servers within the SAP system. It manages load balancing and distributes user requests across available servers. Enqueue Server: Manages lock mechanisms to ensure data consistency and integrity. It handles lock requests from application servers to prevent data conflicts.
Primary Application Server	Component that runs various work processes (dialog, background, update etc.) and services.
Additional Application Server	Performs the same function as the primary application server. It is an optional component that is typically deployed in instances to handle higher workloads or for high availability purposes.
HANA DB

Application Security

Classification

Security configuration or hardening depends on the classification and the associated risks. Security controls are implemented depending on the classification of the data per IT policy and risk management policy.

Authentication

Provide the details of authentication architecture used for the application

Authorisation

Provide the authorization guidelines/principles followed for the application

Communication Security

Provide the details of the communication security controls implemented based on the classification

Data Security

Provide the details of the data security controls implemented based on the classification

Other Controls

Provide the details of any other controls implemented based on the classification

System Landscape

The following table describes the environment and the corresponding application & SID deployed.

Region	Landscape	Systems
Region	Landscape	S/4HANA (HANA DB)	Web Dispatcher	SAP Cloud connector	SAP Data Provisioning Agent	SAC Agent	OpenText Connector
Europe	Sandbox	ERS (HRS)	WRS	N/A	N/A	N/A	N/A
	Development	ERD (HRD)	WRD	CRD¹	DRD¹	SRD¹	ORD¹
	Integration Testing	ERT (HRT)	WRT	N/A	N/A	N/A	N/A
	Training	ER2 (HR2)	WR2	N/A	N/A	N/A	N/A
	UAT	ERQ (HRQ)	WRQ	N/A	N/A	N/A	N/A
	Parallel Testing	ER1 (HR1)	WR1	N/A	N/A	N/A	N/A
	Production	ERP (HRP)	WRP & WRH	CRP	DRP	SRP	ORP

Development Environment

Include the DEV environment details

Project Test Environment

Include the Project Test environment details. Mention Not Applicable, if the environment is not relevant for the application

Quality Environment

Include the Quality environment details. Mention Not Applicable, if the environment is not relevant for the application

Production Environment

Include the PROD environment details

Operation Architecture

Change and Configuration Management

This section will include the details related to change and configuration management of SAP and non-SAP systems.

Transport Management

Provide the details on how transport management will be handled

Release Management

Provide the details on how release management will be handled

Monitoring

This section will include the details related to monitoring enabled for the application

Application Monitoring

Provide the details of application monitoring configuration

System Monitoring

Provide the details of System monitoring configuration

Sizing

Provide the details of sizing approach and the future recommendations

High Availability

Provide the details of High Availability. You may provide a reference to other document or attach a document, if the section contains lot of content

Disaster Recovery

Provide the details of Disaster Recovery. You may provide a reference to other document or attach a document, if the section contains lot of content

Backup/Restore

Provide the details of Backup/Restore. You may provide a reference to other document or attach a document, if the section contains lot of content

Maintenance Plan

Provide the details of system and application maintenance plan. This should follow the upgrade strategy

Service Introduction

Application Category

Provide the details of application category based on application classification. Application category is defined based on RPO, RTO requirements

Support Team

Provide the details of support team that may be required to support the application

Skill required

Provide the details of skills that are required to support this application

Checklist

Provide the checklist for support organization to support the application

Exceptions

This section covers any exceptions to the reference architecture. Some Applications may have limitations and may not meet the Enterprise Architecture, Reference Architecture and IT Policy guidelines. All exceptions should be included in this section.