Building a multi-Region API with Prisma ORM and Amazon Aurora DSQL

This article demonstrates how to build a multi-Region active-active API using Prisma ORM and Amazon Aurora DSQL, enabling both Regions to accept reads and writes simultaneously with strong consistency.

• Amazon Aurora DSQL is a serverless distributed SQL database supporting active-active multi-Region deployments with IAM authentication
• Prisma schema requires three adjustments: relationMode="prisma" for app-level referential integrity, gen_random_uuid() for primary keys, and async index creation
• MultiRegionDsqlClient establishes verified connections to both Regions at startup and provides in-process failover without restarts
• withFailover() wrapper catches connectivity errors (ECONNREFUSED, ETIMEDOUT, unavailable) and retries against the secondary Region
• Deploy application instances in multiple Regions with Route 53 latency-based routing directing traffic to the nearest endpoint
• IAM token-based authentication eliminates static passwords; scope permissions to specific cluster ARNs for security

This pattern enables truly active-active global applications where both Regions accept writes with strong consistency, eliminating traditional active-passive limitations.