event-store-design

To design an event store for scalable event sourcing, define stream schemas, select a persistence technology, and implement per-stream versioning to ensure append-only durability and replayable domain histories.

Per-stream versioning in an event store ensures strict ordering and concurrency control for events within a specific domain stream, enabling reliable replay and preventing write conflicts in event-sourced systems.

Handle data migrations in event-sourced systems by applying snapshots and managing event schema versioning within your event store architecture, ensuring historical events remain compatible during replay at enterprise scale.

You need snapshots in event sourcing when replaying long event histories becomes a performance bottleneck, allowing the event store to restore aggregate state from a saved checkpoint instead of processing every past event.

Implement idempotent writes and subscriptions by defining specific event types and stream schemas in your event store architecture, ensuring reliable global projections and preventing duplicate event processing during replay.

Event sourcing is suitable for enterprise-scale scenarios when your event store architecture supports append-only durability, global event projections, and robust data migrations to handle high-volume, reliable persistence.