event-store-design

Design an event store for event-sourced systems by defining durable, append-only persistence for domain events and structuring stream architecture for aggregates. This enables reliable state reconstruction, cross-stream querying, and scalable playback.

Persist event streams using an append-only event store to capture domain events in durable, ordered sequences. This approach enables auditability and reliable state reconstruction by replaying events through your architecture.

Event store versioning and snapshotting work by periodically saving the current state of an aggregate to reduce replay time. This enables backward compatibility and faster state reconstruction during scalable playback.

You can use PostgreSQL or Kafka as an event store for domain events. Compare EventStoreDB, PostgreSQL, Kafka, and DynamoDB to select appropriate storage technology and implement persistence patterns matching your scalability requirements.

You need checkpointing and subscriptions in event store architecture to enable real-time processing and track consumer position within streams. This creates durable playback positions for cross-stream querying and continuous updates.

Database limitations for event sourcing include lacking native append-only stream semantics and built-in subscriptions compared to dedicated event stores. Evaluate your need for cross-stream querying and scalable playback before selecting storage technology.