Mainframe Migration to Linux

With rising mainframe costs and talent shortages, many organizations are successfully migrating from IBM z/OS to open-source Linux alternatives. Zwiegnet provides end-to-end consulting and hands-on execution to port your critical workloads — including MQ, DB2, Oracle, and COBOL — to modern Linux distributions, delivering massive cost savings, improved scalability, and access to cloud-native tools.

Our mainframe migration services include:

• Assessment & Planning – Inventory of z/OS workloads, applications, databases, middleware; cost-benefit analysis, target Linux platform selection (RHEL, AlmaLinux, Rocky, SLES), and migration roadmap.
• COBOL Application Migration – Port legacy COBOL code to GNU COBOL (GnuCOBOL) or Micro Focus COBOL on Linux; recompile, refactor for POSIX compliance, and modernize to C/C++ or Java where beneficial.
• IBM MQ to Linux – Migrate WebSphere MQ / IBM MQ queues, channels, and applications to Linux; high availability clustering, security hardening, and integration with modern messaging (RabbitMQ/Kafka if desired).
• DB2 Database Migration – Transition IBM DB2 z/OS databases to PostgreSQL, MariaDB, or EDB Postgres on Linux; schema conversion, data migration (using tools like IBM IIU or pg_dump), performance tuning, and replication setup.
• Oracle Database Migration – Move Oracle Database from mainframe to Oracle on Linux or open-source alternatives like PostgreSQL; GoldenGate replication, schema migration, and optimization for x86/ARM architectures.
• JCL/Batch Job Porting – Convert JCL scripts to Linux cron jobs, systemd timers, or containerized workflows; automate batch processing with Bash/Python and orchestrate with Ansible/Kubernetes.
• Security & Compliance – Map mainframe RACF/ACF2/Top Secret to Linux SELinux/AppArmor/PAM; implement auditing, encryption, and compliance with PCI-DSS, HIPAA, NIST standards.
• High Availability & Scaling – Replicate mainframe HA with Pacemaker/Corosync, DRBD, or cloud-native clustering; scale horizontally on commodity hardware or cloud (AWS/Azure/GCP).
• Testing & Cutover – Parallel testing, performance benchmarking (z/OS vs Linux), dry-run migrations, and phased cutover with rollback plans.
• Post-Migration Support – Ongoing administration, monitoring (Nagios/Prometheus), tuning, and knowledge transfer to your team.

Ideal for: financial institutions, banks, insurance companies, government agencies, and enterprises running legacy IBM z/OS mainframes with MQ, DB2, Oracle, and COBOL — seeking 50-80% cost reductions through Linux migration.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to mainframe migration specialists with proven success in porting complex z/OS workloads to Linux.