I entered the world of enterprise software through SAP projects at a time when three-tier client/server architectures were widely considered the safe and proven end state of enterprise computing.
When I began my PhD at the Hasso Plattner Institute in 2006, working with Professor Hasso Plattner, it quickly became clear that this supposed “end state” was already beginning to collapse under the weight of rapidly growing data volumes and increasing system complexity.
In December 2006, Jim Gray delivered his famous talk:
“Tape is Dead, Disk is Tape, Flash is Disk, RAM Locality is King.”
It was more than a memorable line. It was a clear signal of where enterprise systems needed to go—and it helped inspire what later became SAP HANA.
Around the same time, Workday was building its in-memory OMS. The underlying idea was remarkably similar: use memory as the central foundation of the system. The difference was that Workday built this approach without legacy constraints.
Looking back, that period marked a true inflection point: the emergence of systems capable of handling mixed workloads while extending the life and relevance of traditional systems of record.
Years before Gartner introduced the term HTAP, I described the concept in 2010 as OLXP in my paper “A Case for Online Mixed Workload Processing.”