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# Message Broker

Message broker services exchange data and control messages between microservices.

## Broker options

**Kafka**

* The primary broker for exchanging data between microservices, and the default message broker for all blueprints.

**Redis**

* **Developer** and **Smart City** blueprint profiles: Redis is used as a message broker (Redis Streams) for control messages. For example, sending RTSP stream details to VST for dynamic addition.
* **Warehouse** blueprint: Instead of Kafka, Redis can be used as the message broker to send and receive data between microservices. Redis also carries control messages.

## How to choose between Kafka and Redis in the Warehouse blueprint

The **Warehouse** blueprint supports both Kafka and Redis as message brokers. You can choose which one to use based on your deployment requirements.

* If you need a high-throughput message broker with robust persistence and scalability, use Kafka.
* If you need a lightweight message broker with minimal memory footprint and low latency, use Redis.

The following pages document Kafka and Redis in detail:

* [Kafka](/system-components/middleware/message-broker/kafka)
* [Redis](/system-components/middleware/message-broker/redis)

## Docs

- [Kafka](https://docs.nvidia.com/vss/dev/system-components/middleware/message-broker/kafka.md): 
- [Redis](https://docs.nvidia.com/vss/dev/system-components/middleware/message-broker/redis.md):