# Event streaming

> Unlocks the Event Stream: a log that keeps its messages, so consumers replay them.

## What it unlocks

[Event Stream](https://wiki.playquorum.dev/components/log.md)

## Prerequisites

Research these first: [Message queues](https://wiki.playquorum.dev/research/queues.md).

It leads to [Change data capture](https://wiki.playquorum.dev/research/cdc.md).

## Engineering terms

- [At-least-once delivery](https://wiki.playquorum.dev/glossary/at-least-once-delivery.md)
- [CDC (change data capture)](https://wiki.playquorum.dev/glossary/cdc-change-data-capture.md)

## Facts

Event streaming
- **Track:** Data
- **Era:** [Series B](https://wiki.playquorum.dev/eras/series-b.md)
- **Cost:** 5.00k 5.00k 5.00k
- **Requires:** [Message queues](https://wiki.playquorum.dev/research/queues.md)

## See also

- [Research tree](https://wiki.playquorum.dev/research.md)

Source: https://wiki.playquorum.dev/research/event-streaming