Migration Solution Details

Table 1 describes common SAP system migration methods.

**Table 1** Migration tools and methods
Tool/Method	Description
Server Migration Service	SMS provides P2V and V2V migration services to help you migrate applications and data from on-premises X86 physical servers or VMs on private or public clouds to ECSs on HUAWEI CLOUD. For details about how to use SMS, see the Server Migration Service Quick Guide. NOTE: HUAWEI CLOUD also provides the Server Migration Tool (SMT). The Server Migration Service is the SMT provided as a service, but the SMT has more powerful functions. If the SMS cannot meet your requirements, contact HUAWEI CLOUD technical support. The differences between the SMS and SMT are as follows: Supported OSs: SMT supports more types and versions. For those supported by SMS, see Supported Source Server OSs. Connections: For SMS, source servers need to access HUAWEI CLOUD SMS server through the Internet. If a source server and a target ECS are connected through Direct Connect or VPN, ensure that the source server to be migrated can access the SMS.
Image Export/Import	If your servers can be converted into image files, and the type and OS of the image files are listed in Formats and OSs Supported for External Image Files, you can create server image files as private images on HUAWEI CLOUD, and use the images to quickly deploy new servers. For details, see Creating a Linux System Disk Image from an External Image File and Creating a Windows System Disk Image from an External Image File.
Database Backup and Restoration	This method uses the database backup function to export data from the source system, transfer the backup files to the destination system, and then use the database restoration function to restore the data. Proper use of the database backup and restoration feature reduces the migration downtime.
Database Synchronization and Replication	Database replication functions include HANA System Replication, Oracle Data Guard, Always On Availability Groups (SQL Server), and DB2 Q Replication. They all have similar features that allow you to copy a database from one node to another. If you require shorter downtime, use database replication as the data migration tool.
SAP System Copy (R3load)	The System Copy in SAP Software Provisioning Manager (SWPM) can replicate the SAP system to a new system through the Export/Import function. This document does not describe this tool in detail. However, this is a solution to migrate the SAP system to HUAWEI CLOUD. You can visit SASP official website to find details about System Copy and System Copy and Migration.
DMO	Data Migration Option (DMO) is integrated in SAP Software Update Manager (SUM), which upgrades SAP systems and migrate SAP databases. This document does not describe this tool in detail. However, this is a solution to migrate an SAP system to HUAWEI CLOUD. For details, visit the SAP website at Database Migration Option (DMO) of SUM.
Classic migration to SAP HANA	This solution uses a series of processes and tools including heterogeneous System Copy to migrate data from a database to the HANA database. This document does not describe this solution in detail. However, you can use this solution to migrate the SAP system to HUAWEI CLOUD. For details about the solution, see Classical Migration to SAP HANA.
Object Storage Migration Service	OMS is an online data migration service that helps users easily and smoothly migrate object storage data from other public clouds to HUAWEI CLOUD. For details about how to use OMS, see the Object Storage Migration Service Quick Start.
Data Express Service	DES is a massive data transmission solution. It allows transmitting a large amount of data using Teleport devices or disks (with external USB interfaces, SATA interfaces, or SAS interfaces) to HUAWEI CLOUD. DES helps to address issues facing massive data transmission such as high network costs and long transmission time. For details about how to use DES, see Data Express Service Quick Start.