Event Fan-Out

A practical example

Example: a form fill must reach the MAP, CRM, warehouse, an intent tool, and a billing system.

With a dispatcher, a warehouse outage queues delivery for the warehouse only; with point-to-point sends, the same outage can block or lose the CRM copy.

What to evaluate before investing

• When one consumer fails, are deliveries to healthy consumers preserved and retried for the failed one?
• Does the dispatcher support adding a new consumer without changes at the source?
• Can you see per-consumer delivery status and replay an event to one consumer only?

Limitations and tradeoffs

A dispatcher adds its own component that can fail and must be operated; point-to-point avoids that dependency but multiplies connectors and couples the source to every consumer's uptime.