How Can You Identify Applications Suitable for AS/400 Cloud Migration?

Posted by Abel Willium on September 26th, 2023

In the ever-evolving landscape of IT infrastructure, businesses are constantly seeking ways to modernize and optimize their systems. For organizations still relying on the AS/400 platform, a cloud migration can be a game-changer.

This blog post explores the benefits, challenges, and best practices for AS400 Cloud Migration.

The AS400 Dilemma

IBM's AS/400, initially introduced in 1988, represented a groundbreaking platform in its time. Known for its dependable performance and reliability, the AS/400 became a cornerstone for many enterprises, especially in industries such as manufacturing, finance, and logistics.

However, as technology advanced, the AS/400 started to reveal its age, particularly in areas of scalability, adaptability, and cost-efficiency.

The Argument for AS400 Cloud Migration

  • Scalability: Cloud platforms offer virtually limitless scalability. In contrast to the fixed hardware resources of an AS/400, the cloud enables you to tailor resources to meet fluctuating workloads, ensuring your infrastructure can adapt seamlessly.

  • Cost Efficiency: Maintaining a traditional AS400 system can incur substantial costs, with substantial initial investments in hardware and ongoing operational expenses. Cloud computing adopts a pay-as-you-go model, trimming capital expenditures and allowing you to pay solely for the resources you consume.

  • Security and Compliance: Cloud providers heavily invest in security and compliance measures. When you migrate to the cloud, you can leverage these strong security features, reducing the responsibility of overseeing your security infrastructure.

  • Global Accessibility: Cloud-based AS/400 systems facilitate remote access and collaboration from anywhere globally, enabling a more dispersed workforce.

AS/400 Cloud Migration Challenges

Despite the compelling benefits, transitioning an AS/400 to the cloud presents its set of challenges:

  • Compatibility Issues: The AS/400 operates on a proprietary operating system (IBM i) and architecture, which can pose hurdles when migrating directly to the cloud. Compatibility issues might arise when adapting AS400 applications to a cloud-native environment.

  • Data Migration: Relocating substantial data volumes from on-premises AS/400 systems to the cloud can be intricate and time-consuming. Rigorous planning and data migration tools are indispensable.

  • Application Modernization: AS400 applications often rely on outmoded programming languages such as RPG. Modernizing these applications for the cloud could necessitate substantial effort and specialized expertise.

  • Training and Skill Gaps: IT teams might lack the requisite skills and experience in cloud technologies. Adequate training and skill enhancement are imperative.

Optimal Strategies for AS/400 Cloud Migration

  • Assessment and Planning: Commence with an exhaustive evaluation of your AS400 migration environment. Determine which applications and workloads are appropriate for migration. Create a meticulous migration plan, encompassing a timeline and resource allocation.

  • Data Migration Strategy: Develop a robust data migration strategy. Contemplate employing specialized data migration tools and ensure data consistency and integrity throughout the process.

  • Application Modernization: If your AS400 applications necessitate modernization, opt for a cloud-native approach aligned with your business objectives. This could entail refactoring, rearchitecting, or even rewriting applications.

  • Security and Compliance: Confirm that your cloud environment adheres to industry-specific security and compliance requirements. Leverage cloud-native security features and implement best practices.

  • Team Training: Invest in the training and enhancement of your IT team to guarantee they possess the requisite expertise to efficiently manage and optimize your cloud infrastructure.


AS400 Cloud Migration is a strategic move that can revitalize your organization's IT infrastructure. It provides scalability, cost-effectiveness, improved security, and worldwide accessibility. However, it comes with its share of challenges, including compatibility issues and the need for application modernization.

By following best practices, careful planning, and leveraging the expertise of cloud migration professionals, businesses can unlock the full potential of the cloud while preserving the legacy of the AS/400. In doing so, they position themselves for a more agile and competitive future in the digital age.

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Abel Willium

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Abel Willium
Joined: February 25th, 2021
Articles Posted: 34

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