SEGA Corporation: Leveraging Amazon DynamoDB and Amazon ElastiCache Serverless for Valkey to Launch 'Sonic Rumble Party' Globally with a Small Team

SEGA adopted Amazon DynamoDB and Amazon ElastiCache Serverless for Valkey to develop and operate the backend of its global Games as a Service (GaaS) title 'Sonic Rumble Party' with a minimal number of staff. This strategy addresses the connection limits of the previous Amazon Aurora and the burden of complex sharding management, while enabling flexible responses to unpredictable traffic fluctuations.

Architecture and Design Strategy

DynamoDB, the main database, permanently stores key data such as user profiles, items, and progress. As the team transitioned from an RDB-centric approach to NoSQL, they adopted a 'single-table design', separating namespaces by prefixing entity names and reusing generic GSIs (Global Secondary Indexes) to minimize the number of indexes. ElastiCache Serverless for Valkey is used for caching and leaderboards, applying a sharding technique that includes the last four digits of the user ID to resolve hot partition issues with ranking data.

Operational Efficiency and Cost Reduction

The adoption of a serverless architecture eliminated the burden of capacity planning and cluster management, allowing effectively 1 person to handle backend development and operations. With identical configurations for development and production environments (Day-to-Day Parity), the dual logic implementation previously required in the Aurora environment became unnecessary. As a result, costs for development/staging/QA environments were reduced by 95%, and production environment costs by 40–50%, compared to the previous setup. Additionally, DynamoDB's average latency is maintained at under 10ms, and stable responses to traffic spikes were achieved through Warm Throughput configuration and minimum ECPU settings prior to launch.