SAP Basis essentially consists of the three classic software layers:
System Retirement
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.
You can reduce the Queue selection. To do this, select the Support Package that should be the last in the queue. After that, the queue is recalculated. You can also start the recalculation explicitly with Queue. Note that you can only select Support Packages that are part of the software component you have selected (the mouse cursor will change its appearance accordingly). The support packages associated with the calculated queue are green. The highest support package of the previously selected software component is additionally marked with a green tick. The support packages that are no longer part of the queue are still visible in the list and can be selected again. If you want to set the queue for another software component, select New Component. Result You have defined a queue. Now insert the support packages in the queue [page 20]. Rules for the Queue The following rules apply to creating a Queue: If it is an FCS system, the first step is an FCS Support Package. If it is missing from the queue, it cannot be defined. Instead, you will receive an error message telling you the name of the missing FCS Support Package. You cannot insert an FCS support package in a non-FCS system (official state of delivery). Support packages for a selected component are queued in order. If support packages in the queue have connections to support packages of another component (further predecessor relationship, required CRT), the queue will be extended by additional support packages until all predecessor relationships are fulfilled. Note that the SAP Patch Manager takes into account the configuration of your SAP system and only adds support packages to the queue that can be inserted into your system.
Understanding the structure and functioning of the system is especially important for IT administration. It is not for nothing that "SAP Basis Administrator" is a separate professional field. On the page www.sap-corner.de you will find useful information on this topic.
COMPLETE VIEW IN THE CONVERSION OF ROLES
As we know, BASIS is a set of tools. This tool has the following different functionalities.
Mentioning the SUM tool leads us to another part of SAP Basis: system updates and upgrades. Since SAP software receives updates from SAP at regular intervals - in the case of R/3 in the form of SPS (Support Package Stacks) and in the case of S/4HANA in the form of FPS (Feature Pack Stacks) - a large part of an SAP Basis administrator's job is to import these packages into the SAP system.
Some missing SAP basic functions in the standard are supplied by the PC application "Shortcut for SAP Systems".
A degree in computer science is usually required and is now almost obligatory.
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The delivered roles and the profile generator of SAP are used.