Downtime
The target system
Partial copies from SAP systems with the help of tools open up potential savings and in many cases make system copies and complete client copies superfluous. The ability to anonymize data reduces the effort required to comply with data protection regulations in training systems, for example. In addition, up-to-date, consistent test data improves the flexibility and quality of development and test environments. Users save money through reduced resource requirements.
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).
Differentiation between homogeneous and heterogeneous SAP system copy
SAP recommends that you always update enterprise software in your production system using the SAP transport system and never make changes directly in the production system. In addition, SAP suggests that you validate change transports through a QA system that is approximately identical to the production system and has up-to-date transaction data. Outdated data can affect the validity of change transport tests, which can lead to errors and failures in the production system. However, end-user transaction data is received only from the production system. Such data must therefore be passed regularly throughout the SAP transport chain to ensure that your non-production systems have up-to-date and valid transaction data. This can usually be accomplished by passing a system copy of the production system, created for updates, to the QA system. To reduce the number of test cycles, it is also advisable to update your development system occasionally.
Individual steps know exactly where they have to restart the actual copy run in the event of an error. In general, this means that error situations can be handled as needed and with pinpoint accuracy.
"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.
Homogeneous system copy: The operating system and database platform remain unchanged during the copy.
In this way, virtual copies of a logical volume, so-called snapshots, can be created.