Eric Letourneau

Eric Letourneau is Director of Engineering at H&W Computer Systems, where he focuses on CICS systems architecture, VSAM resiliency, and high-availability engineering patterns. He has spent more than 25 years helping organizations optimize mainframe reliability and modernize without disrupting proven workloads.

Turning Nightly Downtime into a Competitive Advantage with VSAM File-Sharing

Dec 9, 2025 | CICS, Infrastructure, Modernization, Performance, Sponsored, Transaction Processing

If you run on IBM Z, you may still stop CICS overnight so batch jobs can update VSAM files. That pause might be necessary today, but it is no longer a requirement. We will show you how to remove the trade-off between fresh data and uninterrupted access with VSAM...