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S/4HANA & SAP BTP Integration: Complex Project Delivery

Case Details

Clients: Pixel Art Company

Start Day: 13/01/2024

Tags: Marketing, Business

Project Duration: 9 Month

Client Website: Pixelartteams.com

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Project Overview & My Role

As Delivery Lead for an SAP NS2 Private Cloud Edition (PCE) engagement, I led a multi-phase integration initiative for a large federal enterprise customer performing a Brownfield S/4HANA 2023 conversion from ECC 6.0, with a simultaneous mandate to modernize the user experience via SAP Fiori/UI5 and integrate business processes across SAP BTP. The program spanned approximately 14 months and involved over 30 technical and functional resources across four distinct teams: the BASIS/infrastructure team (my direct responsibility), the ABAP/custom development team, the BTP Integration Suite team, and the customer’s internal network/security group.

My role encompassed end-to-end technical delivery ownership — from landscape architecture decisions through go-live and hypercare. This included HANA database sizing and parameter governance, transport management strategy (STMS), Cloud Connector configuration, BTP subaccount structuring, Fiori launchpad administration, and cross-team technical governance.

Key Challenges Encountered

The customer operated in an air-gapped network segment (NS2 sovereign cloud), which meant the SAP Cloud Connector needed to traverse multiple firewall tiers to reach BTP. Initial connectivity tests showed 8–12 second response times on OData calls from Fiori apps, rendering the user experience unacceptable. The root cause was suboptimal SCC tunnel configuration and a missing Keep-Alive setting on the internal proxy.
BTP Integration Suite iFlows pushed high-frequency, batch-style payloads into S/4HANA via RFC and OData, triggering memory pressure events on the HANA tenant. We observed MVCC garbage collection backlogs and column store unload events during peak integration windows, causing delta merge bottlenecks.
A late-stage scope change introduced 200+ Fiori catalog/tile transports into an already congested import queue in the QA system. Standard sequential imports would have consumed 36+ hours and blocked regression testing timelines.

Tools, Techniques & Resolution

I worked directly with the customer's network security team to redesign the SCC tunnel routing, enabling a dedicated internal route from the SCC host to the ABAP message server. I tuned the SCC's jvm.options to increase heap allocation, configured backend mapping with explicit virtual-to-internal host resolution, and implemented HTTP Keep-Alive at the proxy layer. Response times dropped to under 800ms — a 90%+ improvement — which the Fiori UX team confirmed resolved the user acceptance testing blockers.
I used HANA Cockpit and a suite of custom M_* monitoring SQL queries to profile the integration load pattern. I adjusted the global_allocation_limit, tuned the column store merge scheduler parameters (smart_merge_enabled, critical_merge_decision_func), and coordinated with the BTP Integration Suite team to implement message batching and throttling within the iFlows — capping inbound RFC burst rates to align with HANA's delta merge cycle. I also built a business case for a HANA scale-up, which was approved and implemented ahead of production go-live.
I implemented a two-phase mass import strategy using STMS with GENERATION=FALSE and ACTIVATEMERGED=TRUE, combined with parallel import queue processing across pre-grouped transport batches. This reduced the total import window to under 7 hours. I also established a pre-import validation gate using SE09/SE10 checks and post-import verification via SM21 logs and Fiori app activation status in /UI2/SEMOBJ.

Cross-Team Collaboration

I chaired a weekly Technical Integration Sync attended by the BASIS team, BTP architects, ABAP leads, and customer infrastructure stakeholders. I maintained a shared RAID log and served as the single escalation point for cross-team blockers. One particularly critical collaboration involved jointly redesigning the BTP subaccount structure mid-project: the original single-subaccount design created role collection conflicts between Integration Suite and Cloud Connector principal propagation. I drove alignment between the BTP team and the ABAP security team to establish a two-subaccount model (Integration / Connectivity), eliminating the principal propagation overlap.

Outcome & Business Impact

The S/4HANA system went live on schedule with zero critical-severity incidents during the hypercare period. Key outcomes included: Fiori adoption reaching 78% of targeted end-users within 30 days of go-live; BTP Integration Suite processing over 500K messages per month with 99.94% reliability; and HANA database performance sustaining peak BTP workloads within defined SLA thresholds. The customer formally recognized the technical delivery team for on-time, on-budget execution — a rare outcome for an integration program of this complexity in a sovereign cloud environment.

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