As indicated earlier, SAP Infrastructure or SAP Basis refers to both the technical foundation and the actual SAP installation upon which all development activity and productive operations rely. Note that I will also use the term SAP Solution Stack interchangeably with SAP Infrastructure and SAP Basis.
The solution stack references the “layers” of infrastructure and technology that sit one on top of the other in support of an SAP solution, like the layers in a three-layer cake. Generally speaking, this might include the following:
Physical space, like a computer room or other data center facility
Power, cooling, and other utility-based infrastructure layers
Physical mounting and racking layer