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Alameda Group Completes SAP BW Migration from Oracle to HANA DB.
Overview
As part of its ongoing SAP modernization roadmap — which has already seen its ERP landscape consolidated and migrated to SAP HANA — Alameda Group engaged DigiMed to migrate its SAP Business Warehouse (BW) from Oracle to SAP HANA DB, completing the group's transition to a single strategic database platform.
The Challenge
The Oracle-based BW had become a bottleneck for group-wide reporting:
The Solution
DigiMed executed the migration with SAP's standard tools and a BW-specific optimization pass:
Benefits Achieved
The BW migration completes Alameda Group's database modernization journey — every SAP workload now runs on HANA, reporting is dramatically faster, and the foundation is in place for the group's expanding analytics agenda.
As part of its ongoing SAP modernization roadmap — which has already seen its ERP landscape consolidated and migrated to SAP HANA — Alameda Group engaged DigiMed to migrate its SAP Business Warehouse (BW) from Oracle to SAP HANA DB, completing the group's transition to a single strategic database platform.
The Challenge
The Oracle-based BW had become a bottleneck for group-wide reporting:
- Long data loads: Nightly load chains from the hospital systems ran for hours and increasingly collided with the online reporting day.
- Slow queries: Heavy management reports across multiple facilities and years of history took minutes to render, discouraging self-service use.
- Growing volumes: Clinical and financial data volumes across the group's hospitals kept growing, stretching the platform further.
- Split platforms: With ERP already on HANA, keeping BW on Oracle meant maintaining two database skill sets and support contracts.
The Solution
DigiMed executed the migration with SAP's standard tools and a BW-specific optimization pass:
- Housekeeping first:
Obsolete data, unused objects and aged PSA/changelog content were cleaned up, shrinking the database ahead of migration. - DMO migration:
The migration ran via SUM/DMO in a controlled window, rehearsed end-to-end on a production copy. - HANA-optimized objects:
Key InfoCubes and DSOs were converted to HANA-optimized forms and critical query paths were tuned. - Load chain re-sequencing:
Process chains were rebuilt to exploit HANA's load performance and shorten the nightly window.
Benefits Achieved
- Loads in minutes:
Nightly load chains that previously ran for several hours now complete in under an hour. - Instant reporting:
Management queries render faster, making true self-service reporting practical for finance and operations teams. - One platform:
A single HANA-based landscape for ERP and BW simplifies administration, backup and disaster recovery. - Analytics-ready:
The HANA-based BW now feeds SAP Analytics Cloud dashboards with live, trusted data.
The BW migration completes Alameda Group's database modernization journey — every SAP workload now runs on HANA, reporting is dramatically faster, and the foundation is in place for the group's expanding analytics agenda.
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