High Availability ( HA/DR ) concepts
Definition of general system parameters
Always the latest version: Your system will always be up to date and you will have access to the latest versions. Patches are performed by the external SAP Basis team.
To ensure audit-proof traceability, you should only allow software components and namespaces to be changed on a production system in exceptional cases and for a limited period of time. This should only be done restrictively to prevent manipulation at the production level.
SAP Basis essentially consists of the three classic software layers:
A first important step was the introduction of playbooks to professionalize our work. At that time, SAP installation manuals were real tomes with hundreds of pages that often went round in circles and were anything but easy to understand....
So-called Access Control Lists (ACL) offer a good possibility to secure your gateway in order to exclude unwanted external accesses to the database of the application server. With the help of the ACL files reginfo and secinfo an access control can be implemented, in which allowed as well as forbidden communication partners can be defined. The reginfo file controls the registration of external programs on the gateway, which means that rules can be defined that allow or prohibit programs. With the help of the file secinfo you can define which users are allowed to start an external program. To be able to use these files, you must set the parameters gw/reg_info and gw/sec_info (transaction RZ11). For more information, refer to SAP Note 1408081.
Tools such as "Shortcut for SAP Systems" are extremely useful in basic administration.
For example, I have a customer who runs the user synchronization for his users in the USA and Asia at different times, so that the daily business of the respective users is not disturbed.
Using SAP's own programming language ABAP, developers and programmers design SAP applications that run on the ABAP stack of the SAP NetWeaver Application Server as the only publicly accessible ABAP runtime environment.