# EMQ X Enterprise Documentation(R2)
EMQ X is the enterprise version of EMQ MQTT message broker. It adopts Scalable RPC mechanism, provides more reliable clustering and higher performance of message routing.
EMQ X supports persistence MQTT messages to Redis , MySQL, PostgreSQL, MongoDB, Cassandra and other Database. It also supports bridging and forwarding messages to enterprise middleware like Kafka and RabbitMQ.
EMQ X can be used as access platform for smart hardware, smart home, IoT, automotive networking applications that serve millions end device.
# Content
- Overview
- Deployment
- Installation
- User Guide
- Configuration
- EMQ X Dashboard
- Rule Engine
- Rule Engine Tutorial
- AuthN/AuthZ
- Backends
- Bridges
- Clustering
- Design
- Commands
- Plugins
- REST API
- Rate Limit
- Tuning Guide
- MQTT Protocol
# License
Copyright (c) 2016-2019 EMQ Enterprise, Inc. All Rights Reserved.
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