EventFlux

Stream processing engine built in Rust. Write SQL, process events, skip the infrastructure headache.

Why EventFlux

You need to detect patterns in event streams, aggregate metrics, or react to conditions in real-time.

Your options today:

• Flink — needs Kubernetes, 4GB+ JVM heap, dedicated ops
• Kafka Streams — needs a Kafka cluster plus Java expertise
• Build it yourself — months of work

For 100k events/sec, that's overkill.

EventFlux runs as a single binary. No cluster. No JVM. No YAML manifests. Just SQL.

Quick Start

# Docker
docker run -v ./app.sql:/app.sql ghcr.io/eventflux-io/engine /app.sql

# Or build from source
git clone https://github.com/eventflux-io/engine.git
cd engine
cargo build --release
./target/release/run_eventflux app.sql

Prerequisites (for building)

• Rust 1.85+
• Protocol Buffer compiler (for gRPC features)

Example

CREATE
STREAM Trades (symbol STRING, price DOUBLE, volume INT);

SELECT symbol, AVG(price), SUM(volume)
FROM Trades WINDOW TUMBLING(1 min)
GROUP BY symbol
INSERT
INTO Summaries;

That's it. No boilerplate. No config files. Just SQL.

How It Compares

	EventFlux	Flink	Kafka Streams
Deployment	Single binary	Kubernetes cluster	Kafka cluster
Memory	50-100MB	4GB+ JVM	1GB+ JVM
Language	SQL	Java/SQL	Java
Setup time	Minutes	Hours/days	Hours
Scale ceiling	~500k eps	Millions+	Millions+

Choose EventFlux when you want simple deployment and SQL-first development.

Choose Flink when you need massive scale or batch+stream processing.

Documentation

Full docs at eventflux.io:

• Getting Started — install and run your first query
• SQL Reference — windows, joins, patterns, aggregations
• Connectors — Kafka, RabbitMQ, WebSocket, HTTP
• Examples — real-world use cases
• Architecture — how it works under the hood

Performance

• 1M+ events/sec on a single node
• Sub-millisecond latency
• Zero GC pauses
• Starts in milliseconds

When to Use

Good fit: IoT backends, e-commerce tracking, analytics pipelines, SaaS telemetry, fraud detection.

Not a fit: You need 100+ connectors, or you're already running Flink at scale.

Status

Active development. Core CEP works. 1,400+ tests passing. See ROADMAP.md for details.

Contributing

cargo test        # run tests
cargo clippy      # lint
cargo fmt         # format

See DEV_GUIDE.md for setup.

License

Apache-2.0 or MIT.