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Critical factor: Availability
While homogeneous SAP system copy expects identical combinations of operating/database systems on the source and target systems, there is also a requirement for different combinations of operating/database systems on the source and target systems in the project environment (eg, during migrations). This is referred to as a "heterogeneous SAP system copy". Technically, it is quite possible to build up a degree of automation here as well, but officially certified consultants ("migration consultants") are required to perform the heterogeneous system copy.
There are various ways to tame this time robber and reduce run times. For example, through parallelization or the automatic generation of secondary indices.
Create SAP HANA system replication levels
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).
With "Shortcut for SAP Systems" a tool is available that simplifies the SAP system copy and offers additional possibilities.
It is not unusual for them to have to introduce new processes and projects particularly quickly and securely for the benefit of their own competitiveness.