Defintion :
SAP introduces the term LSA – Layered, Scalable Architecture in order to describe the design of service-level oriented, scalable, best practice BW
architectures founded on accepted EDW principles*. EDW = Enterprise Data Warehouse The LSA serves as a reference architecture
to design transparent, complete, comprehensive customer DWH architectures (Customer LSA). The Customer LSA describes corporate standards
to build BI applications in a performant, maintainable, flexible manner.
LSA is used on RBMS (RDBMS stands for Relational Database Management System = Oracle Database for us -> see appendices for more detail)
LSA++ is used on HANA.
Main difference between LSA and LSA ++ is about the usage of DSO instead Infocube on the multiprovider because infocube will dispear with Hana.
After several month LSA on WBP system for any new project or important maintenance developments are :
Level 0 : Acquisition layer = PSA
Level 1 : Harmonisation layer = infosource (not often used and 98 % of dev are done with acqusition layer PSA to Propagation layer = DSO)