AS/400 Modernization for a Global Enterprise: Achieving Cloud Scalability and Enhanced Analytics

The Client:
A large global enterprise running mission-critical workloads on legacy IBM AS/400 (IBM iSeries) applications, facing challenges with aging infrastructure, high maintenance costs, limited scalability, and reduced agility. The organization aimed to modernize its IT landscape to leverage cloud benefits, optimize operations, and enhance data-driven decision-making.

The Challenge:
The client’s AS/400 applications, while robust and reliable, presented significant hurdles:

• Legacy Infrastructure: Older AS/400 applications were difficult to maintain and expensive to operate, relying on monolithic code and 5250-based ‘green screens’.
• Limited Scalability & Agility: The existing architecture impeded business growth, making it challenging to introduce new features quickly and scale operations efficiently.
• Data Silos: Valuable information stored in AS/400 systems was not easily accessible for modern analytics and real-time reporting.
• Cost & Risk: Upgrading AS/400 hardware and software, including third-party licenses, was costly and involved significant risks of downtime and compatibility issues.
• Talent Gap: A shrinking talent pool with AS/400 expertise made maintenance and modernization efforts increasingly difficult.
• Migration Complexity: The AS/400 migration journey is complex, requiring different approaches for re-hosting, re-engineering, and managing hybrid environments to ensure data synchronization and security.

Simarn Solutions Solution:
Simarn Solutions partnered with the client, leveraging its ART (Accelerate, Transform, and Renew) Framework and a specialized Cost Assessment Framework to define and execute a comprehensive AS/400 modernization strategy. The solution focused on a multi-pronged approach:

AS/400 Migration – Containerization/Refactoring for Cloud

• Strategy Definition: Led a cross-functional team to define and execute a modernization strategy, moving legacy datacenter workloads, including IBM i (AS/400), to a cloud-ready environment.
• Application Assessment & Refactoring: Conducted a detailed assessment of AS/400 applications, addressing challenges like limited documentation and monolithic code. Developed a refactoring strategy to break down tightly coupled business logic into modular components.
• Containerization Evaluation: Evaluated and implemented containerization strategies to package AS/400 applications for deployment in cloud-native environments, enhancing portability and scalability.
• Hybrid-Cloud Architecture Design: Designed a robust hybrid-cloud architecture that allowed existing AS/400 systems to coexist and synchronize with new cloud platforms during the transition, minimizing disruption. This aligns with Simarn Solutions’ approach of ensuring
  end-to-end processes are not broken during migration.
• Cost Optimization & Operational Resilience: Focused on ensuring the cloud environment delivered higher scalability, agility, and cost benefits, aligning with the client’s business objectives.

Data Migration from AS/400 to GCP

• Data Migration Strategy: Championed the development and execution of a data migration strategy for IBM i (AS/400) databases to Google Cloud Platform (GCP). This involved converting existing DDS physical and logical files to DDL tables, views, and indexes, simplifying the complexity of multi-member physical files.
• ETL Pipeline Design: Guided the design of efficient Extract, Transform, Load (ETL) pipelines, ensuring seamless data transfer and transformation from AS/400 to GCP.
• Schema Mapping & Validation: Oversaw meticulous schema mapping, data validation, and reconciliation processes to ensure data integrity and accuracy post-migration.
• Regulatory Compliance: Ensured the entire process adhered to regulatory compliance standards, critical for the enterprise.
• Minimizing Disruption: Implemented strategies to minimize disruption to business operations during the data migration phase, leveraging Simarn Solutions’ AS/400 data migration tools and testing framework.

Building a Cloud-Based Data Mart

• Data Mart Design & Implementation: Orchestrated the design and implementation of a cloud-based Data Mart, consolidating AS/400 transactional data to support enterprise analytics and reporting.
• Data Models & ETL Workflows: Directed the definition of robust data models and streamlined ETL workflows to ingest and process data from various sources efficiently.
• Cloud Integration Pipelines: Developed cloud integration pipelines to ensure data quality, scalability, and alignment with business intelligence objectives, enabling timely insights for decision-making.

AS/400 System Retirement

• Retirement Strategy: Led the development and execution of a comprehensive retirement strategy for legacy AS/400 systems.
• Workload Assessment & Archival: Conducted thorough workload assessments, identifying inactive data for archival and planning for the decommissioning of non-essential components.
• Risk Mitigation: Implemented robust risk mitigation strategies to ensure a seamless transition to modern platforms, reducing operational risk and optimizing costs.
• Standardized Framework: Created a repeatable framework for future legacy system retirements, ensuring consistency and efficiency.

Key Benefits / Outcomes:

• The Simarn Solutions solution delivered significant value, transforming the client’s AS/400 landscape:
• Clear Modernization Roadmap: Developed a clear and actionable roadmap for AS/400 modernization, providing a structured approach for future initiatives.
• Enhanced Scalability & Agility: Achieved scalable, cloud-native workloads, significantly reducing dependency on legacy infrastructure and improving the ability to respond to market demands faster. This allowed the client to leverage open-source technologies and
  microservices architecture.
• Reduced Operational Overhead & Costs: Reduced operational overhead and maintenance costs by migrating from expensive
  AS/400 operations to cost-effective cloud services.
• The Cost Assessment Framework demonstrated a projected 35% reduction in Total Cost of Ownership (TCO) over 10 years by migrating compared to continuing in AS/400.
• Potential for 30-40% reduction in overall maintenance, development, and performance cost through RPG upgrades and modernization.
• Achieved 50-60% reduction in future modernization efforts through strategic upgrades.
• Improved Decision-Making & Analytics: Delivered a centralized repository for business analytics and enabled near real-time reporting, empowering improved decision-making across the enterprise.
• Minimized Business Disruption & Risk: Reduced estimated downtime risks through meticulous hybrid-cloud and
  containerization planning.
• Validated database migration processes for large-scale IBM i datasets, ensuring data integrity.
• Minimized business disruption during system retirement and ensured compliance with industry regulations.
• Reusable Frameworks: Built reusable assessment and refactoring frameworks for future migration initiatives, promoting consistency and efficiency.
• Future-Proof Architecture: Established a scalable and cloud-native architecture compatible with future cloud migration initiatives, ensuring long-term sustainability and innovation.

Conclusion:
The global enterprise successfully navigated the complexities of AS/400 modernization, moving from a legacy, high-cost environment to a highly scalable, agile, and cost-efficient cloud platform. This strategic transformation not only addressed immediate operational challenges but also positioned the client for future growth and enhanced data-driven capabilities.