Customer Stories

Explore real workflows that save companies time, eliminate old tools, and bring peace of mind. If you're interested in any of the services from the customer stories below, feel free to book a free consultation with one of our experts.

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x86 Migration

OpenVMS x86-64 Migration

An industrial company migrated its OpenVMS-based application to x86-64, replacing the unsupported Sybase OpenClient with FreeTDS. The migration required updating embedded SQL and porting 300,000+ lines of code in C, C++, and Fortran. VMware-based virtualization introduced networking challenges but was successfully implemented. Debugger issues slowed testing but were resolved with engineering support. VSI teams assisted with design, migration, and system tuning.

x86 Migration & Modernization

Modernization Prior to x86-64 Migration

A telecom provider prepared for an x86-64 migration by first modernizing their OpenVMS Integrity environment. Key updates included replacing outdated Java and database interfaces with OpenJDK 8 and FreeTDS. The migration also involved updating COBOL-based applications and replacing legacy ACMS interfaces. These changes reduced risks and ensured a smoother transition to x86-64. The customer received ongoing support from VSI Application Services.

Hardware Migration

Complex Alpha to Integrity migration

A large telecommunication provider wanted to replace their Alpha servers with Integrities. The core application running on OpenVMS comprised several million lines of complex code written in a variety of languages, including COBOL, Pascal, and C, and interacted with a Sybase database hosted on a UNIX platform, with communication between the OpenVMS-based application and the Sybase database being achieved via the Sybase Open Client API.