Multicloud: the systems involved with different hyperscalers
Conclusion
When executing a system copy, all tables, processes, databases, etc. are taken into account when copying. Logical system names must also be converted (using the BDLS trasaction code). The process of a system copy usually does not change. If no structural changes have been made to the SAP systems involved, the process is even 100% identical. Due to the very high repeatability of the nevertheless complex process, it is advisable to automate it to a large extent.
Heterogeneous system copy: As the name suggests, the operating system and/or database on the source and target systems are different. One takes thus in the context of the copy a platform change. This procedure is currently gaining in relevance, as it is required for the migration from SAP ERP to S/4HANA. If the current system runs on Windows Server and SQL Server or Oracle, the target system must now run on Linux and SAP Hana.
Planning Guide for the Connector for SAP Landscape Management
Renaming and restoring the target system database - adjusting file system permissions. Renaming, recovery and startup of the target system database.
The steps to be taken before shutting down the target SAP system can be summarized as follows: Well before performing the upgrade, inform the target system users - especially project managers, developers, and testers - about the planned maintenance work via e-mail, SAP system messages, and/or a message at the system logon. Using the SAP transport system requires careful preparation so that software development projects can be completed as far as possible. Shortly before the start of the update, inform users again that maintenance work on the system is imminent and that they should log off from the target system. After logging users off and locking them out, download system-specific content from the target system database for customization (including security settings, Remote Function Call (RFC) targets, and operating modes).
"Shortcut for SAP Systems" can considerably simplify and shorten a number of activities within the scope of a system copy or a system refresh. By using this application in conjunction with the information on system-specific tables from the PCA tool, the system-specific data can be backed up and restored after the system copy / system refresh. As a result, many of the activities mentioned here regarding data backup / restore can be performed much more easily; the creation of screenshots and the subsequent manual restoration of the state documented in this way can then be completely eliminated.
The SAP system copies required for this are quite time-consuming and complex, but also offer very great automation potential.
The database import can be performed using various tools.