IBM i (AS/400, iSeries) to Linux Migration

Modernize Your IBM i Workloads with Minimal Risk

Expert migration services from IBM i (AS/400, iSeries) to Linux — porting RPG, COBOL, DB2/400 databases, green-screen applications, and integrated workloads to cost-effective, open-source Linux platforms with PostgreSQL, modern languages, and cloud readiness.

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Our IBM i to Linux Migration Services

IBM i systems remain mission-critical in manufacturing, distribution, finance, and retail — but high licensing costs, talent shortages, and limited modernization options push organizations toward Linux. Zwiegnet provides low-risk, phased migrations that preserve business logic while unlocking scalability, cost savings, and open-source flexibility.

Our IBM i migration services include:

Assessment & Planning – Full inventory of RPG/COBOL programs, DB2/400 schemas, DDS files, integrated jobs, and dependencies; cost analysis and target Linux platform selection (AlmaLinux, Rocky, Ubuntu LTS).
RPG & COBOL Porting – Convert RPG III/IV/ILE and COBOL to modern RPG (IBM i open-source), free-format RPG, or C/Java/Python; refactor green-screen to web (e.g., Profound.js, Node.js, Spring Boot).
DB2/400 to PostgreSQL/MariaDB – Schema conversion, data migration, stored procedure porting, trigger/logic preservation, and performance tuning on Linux.
Green-Screen Modernization – Transform 5250 interfaces to web/mobile (HTML5, React, Angular) while keeping business logic intact; tools like RAMP, Profound UI, or custom development.
Batch & Scheduling – Migrate CL programs, job schedulers, and batch jobs to Linux cron, systemd timers, Ansible Tower, or Apache Airflow.
Security & Compliance – Map IBM i object authority to Linux SELinux/AppArmor/PAM; encryption, auditing, and compliance (PCI-DSS, HIPAA, SOX).
High Availability & Scaling – Replicate IBM i HA (MIMIX, iTera) with Pacemaker/Corosync, DRBD, or cloud-native clustering on Linux.
Testing & Cutover – Parallel testing, performance benchmarking (IBM i vs Linux), phased rollout, and minimal-downtime cutover with rollback.
Post-Migration Support – Ongoing Linux administration, monitoring, tuning, and team training.

Ideal for: manufacturing, wholesale distribution, finance, and mid-sized enterprises running legacy IBM i systems seeking 40-70% cost reduction and modern cloud/DevOps capabilities.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to IBM i migration specialists with proven success in porting RPG/COBOL/DB2 workloads to Linux.

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