Migration Scenarios

If your SAP system uses old version software whose performance is poor, or the system is deployed on cloud servers of small specifications with an inflexible architecture, you are suffering from slow system running and high O&M costs, especially when the businesses running on the system are growing. An increasing number of customers are choosing to migrate SAP systems to HUAWEI CLOUD to reduce costs and improve efficiency. HUAWEI CLOUD SAP on Cloud solution provides comprehensive cloud deployment schemes, improving the efficiency and reducing costs.

SAP migration projects are much more complex than traditional IT migration projects. An SAP migration project involves hardware migration, software upgrade, service and interface testing, project management, and risk control. In addition, a SAP migration project involves personnel and organizations from multiple parties, including customer's IT team, service team, migration implementor, and infrastructure provider. A successful migration project requires close collaboration among all the parties. During the migration, HUAWEI CLOUD provides infrastructure and assistants the migration. In addition, HUAWEI CLOUD platform will facilitate the project implementation.

This document is not a replacement of SAP's or database vendor's official documents. This document is intended for SAP migration consultants and SAP practitioners. The restrictions and specifications of SAP software and databases in this document are subject to the official documents.

This document assumes that you are familiar with SAP system deployment and operations on HUAWEI CLOUD. If you are new to HUAWEI CLOUD SAP on Cloud solution, read the following documents:

This document describes how to migrate SAP systems from on-premises or other cloud platforms to HUAWEI CLOUD in four typical migration scenarios, as described in Table 1. You can select a suitable migration solution based on the actual requirements.

**Table 1** Migration scenarios
Scenario	Description	Solution
Migrating SAP systems from x86 platform to HUAWEI CLOUD	In this scenario, you migrate an SAP system that is deployed on an x86 physical machine in your on-premises data center or a VMWare virtual machine (VM). The supported operating systems (OSs) of servers are listed in OSs Supported by Different Types of ECSs. There is no restriction on the database. After the migration to HUAWEI CLOUD, the database and OSs remain unchanged.	Use the following services and tools to migrate the system: Use HUAWEI CLOUD Server Migration Service (SMS) to migrate SAP application servers without service interruption, replicating off-cloud servers to HUAWEI CLOUD. If there is no requirement on database downtime, use the SMS to migrate the database of a non-production system. To reduce the service downtime, use the native database migration tool to move the production system database to the cloud. For example, use SystemReplication, Oracle DataGuard, or SQL Logging Shipping migrate HANA.
Migrating SAP systems form a third-party cloud to HUAWEI CLOUD	In this scenario, you migrate an SAP system that is deployed on a third-party cloud. The supported server OSs are listed in OSs Supported by Different Types of ECSs. There is no restriction on the database. In addition, other cloud services, such as object storage service, can be involved in. After the migration to HUAWEI CLOUD, the database, OSs, and system architecture remain unchanged. The involved cloud services of other cloud vendors will be changed to those of HUAWEI CLOUD.	The solution is similar to that of the previous scenario. However, there are some differences: You can easily adjust the network bandwidth between the third-party cloud platform and HUAWEI CLOUD. The maximum bandwidth can be hundreds of Mbit/s. Generally, the system architecture does not need adjustment. If the on-premises system architecture is complex, you need to replan the deployment architecture of the system on the cloud. Generally, an on-premises system contains only physical servers or VMs. A system on a third-party cloud may contain cloud service resources.
Migrating SAP systems from IBM or HP midrange computers to HUAWEI CLOUD	In this scenario, you migrate an SAP system deployed on IBM or HP midrange computers. The OSs are not supported by HUAWEI CLOUD. There is no restriction on the database. After the migration, the OSs are changed to those supported by HUAWEI CLOUD, and the database remains unchanged.	You need to deployed application servers and the database server of the system on HUAWEI CLOUD. The target system is redeployed on HUAWEI CLOUD ECSs or BMSs. Solutions for database migration are as follows: Use the SAP R3load Export/Import function to migrate the database. Or use some native database tools, such as Oracle GoldenGate or Oracle XTTS, to back up databases.
Migrating SAP applications running on a non-HANA database to HUAWEI CLOUD SAP HANA	In this scenario, you migrate an SAP system deployed in the local data center. The database is a non-HANA database (such as Sybase, Oracle, and DB2). The target end is HUAWEI CLOUD SAP HANA system. The server OSs may change.	The project includes system migration, software upgrade, and database and OS change. Use the database migration option (DMO) of SAP SUM to upgrade and migrate the SAP system to HUAWEI CLOUD SAP HANA system. Use the Classical Migration to SAP HANA solution. Use SUM to upgrade the system to a supported version, and then use the System Copy function of SWPM to migrate the system onto the HANA database.

Due to the complexity of a migration project, this section will not include the detailed migration processes, but only focuses on the part related to HUAWEI CLOUD. There are two types of migration:

Homogeneous migration: The databases and OSs of the source and destination servers remain unchanged, and the software can be upgraded in the homogeneous migration.
Heterogeneous migration: Either of databases and OSs are changed.

You can view the following examples: