Introducing ExtendDB: An open source DynamoDB-compatible adapter with pluggable storage backends

This article introduces ExtendDB, an open-source DynamoDB-compatible adapter with pluggable storage backends, released under Apache 2.0 License.

• Implements DynamoDB wire protocol; works with existing AWS SDKs and tools unchanged
• PostgreSQL is the first backend; additional backends can be added via Rust trait
• Supports local development, CI/CD, on-premises, and air-gapped environments
• Compiles to single binary with mandatory TLS and SigV4 authentication
• Supports core DynamoDB operations: tables, items, queries, transactions, streams, TTL, import/export
• Managed via CLI or web console at https://127.0.0.1:8000/console/
• Early v0.1 release for development and experimentation
• Not a DynamoDB replacement; performance and scaling differ from managed service

ExtendDB enables teams to use DynamoDB access patterns outside AWS without rewriting application code, addressing scenarios like edge computing and on-premises deployments.