CU*Answers High Availability Program Review

This technical report details the CU*Answers High Availability (HA) program review conducted from September 17 to September 20, 2023. The report outlines the processes involved in maintaining a high-availability core processing environment, which includes live HA rollover events that redirect operations to a secondary data center. The primary objective of these rollovers is to ensure business continuity and minimize downtime during unexpected incidents. The report documents a specific rollover event where an unscheduled rollback was required due to system performance issues. It describes the timeline of events, including the initiation of the rollover, challenges faced, and the successful completion of the rollback. The report also highlights ongoing efforts to improve the HA rollover process by reducing latency and enhancing system performance. It emphasizes the importance of these rollovers as disaster recovery exercises, detailing the complexities involved in planning and executing them while minimizing disruptions to critical applications.