IDUG NA 2026

Ensuring high availability and resilience is a core requirement for modern enterprise data platforms. In Db2 Data Sharing environments, lock structures are a fundamental component for maintaining system stability and consistent performance under continuous, mission-critical workloads.
At Itaú Unibanco S.A., Db2 for z/OS supports essential banking applications operating 24x7, across transactional and batch workloads in a large-scale production environment. As part of its ongoing resilience and architecture evolution strategy, Itaú adopted the Db2 Lock Structure Asynchronous Duplex capability.
This implementation strengthened the platform’s resilience posture by increasing fault tolerance, enhancing operational continuity during infrastructure maintenance, and reinforcing overall system stability.
In this presentation, specialists from Itaú and IBM share practical insights from the initiative, including architectural motivations, implementation considerations, testing approaches, and results achieved. The discussion highlights how close collaboration between client and vendor supported the successful adoption of advanced Db2 z/OS capabilities in a complex enterprise environment.

This session will share experience from client studies and engagements: sharing proven recommended best practice; learning good, bad and ugly; providing answers ti important, frqeeunt or difficuly questions. This session will cover the following topics: Complacency about component failure and ability to absorb workload failover in a dat asharing environment; missed opportinity for elapsed time performance improvementnfor skip sequnetial batch processing; misteps in evaluating the performance benenfit of CICS-Db2 thread reuse and RELEASE(DEALLOCATE); SQL coding to avoid update anomaly when using cursor stability isolation; misadventures when using High Performance DBATs;monitoring WLM policy achievement; options for mass data recovery following logical data recovery and data loss; performance issue with remote DDF batch workload; tuning ogf GBPs; thorough Disaster Restart testing.