Black Friday presents significant challenges for inventory management systems due to the surge in shopper activity, requiring systems to ensure scalability, high availability, low latency, and consistency. Retailers must prepare for unpredictable demand by utilizing flexible, distributed, cloud-based architectures that can quickly scale resources and maintain service continuity. High availability is crucial to avoid financial losses from system outages that could lead to overselling or a poor customer experience. Low latency is essential to keep shoppers satisfied and prevent them from turning to competitors. Consistency across all system components is vital to prevent errors like selling beyond zero stock. Modern solutions such as distributed SQL databases like CockroachDB provide the necessary transactional consistency and scalability, with built-in features like Change Data Capture to keep application services updated without overwhelming the database. While no system can entirely alleviate the stress of Black Friday, such architectures significantly ease the management of high traffic and complex transactions.