ray 2.39.0

Ray provides a simple, universal API for building distributed applications.

Ray is a unified framework for scaling AI and Python applications. Ray consists of a core distributed runtime and a set of AI libraries for simplifying ML compute:

Learn more about Ray AI Libraries:

• Data: Scalable Datasets for ML

• Train: Distributed Training

• Tune: Scalable Hyperparameter Tuning

• RLlib: Scalable Reinforcement Learning

• Serve: Scalable and Programmable Serving

Or more about Ray Core and its key abstractions:

• Tasks: Stateless functions executed in the cluster.

• Actors: Stateful worker processes created in the cluster.

• Objects: Immutable values accessible across the cluster.

Learn more about Monitoring and Debugging:

• Monitor Ray apps and clusters with the Ray Dashboard.

• Debug Ray apps with the Ray Distributed Debugger.

Ray runs on any machine, cluster, cloud provider, and Kubernetes, and features a growing ecosystem of community integrations.

Install Ray with: pip install ray. For nightly wheels, see the Installation page.

Why Ray?

Today’s ML workloads are increasingly compute-intensive. As convenient as they are, single-node development environments such as your laptop cannot scale to meet these demands.

Ray is a unified way to scale Python and AI applications from a laptop to a cluster.

With Ray, you can seamlessly scale the same code from a laptop to a cluster. Ray is designed to be general-purpose, meaning that it can performantly run any kind of workload. If your application is written in Python, you can scale it with Ray, no other infrastructure required.

More Information

• Documentation

• Ray Architecture whitepaper

• Exoshuffle: large-scale data shuffle in Ray

• Ownership: a distributed futures system for fine-grained tasks

• RLlib paper

• Tune paper

Older documents:

• Ray paper

• Ray HotOS paper

• Ray Architecture v1 whitepaper

Getting Involved

Platform	Purpose	Estimated Response Time	Support Level
Discourse Forum	For discussions about development and questions about usage.	< 1 day	Community
GitHub Issues	For reporting bugs and filing feature requests.	< 2 days	Ray OSS Team
Slack	For collaborating with other Ray users.	< 2 days	Community
StackOverflow	For asking questions about how to use Ray.	3-5 days	Community
Meetup Group	For learning about Ray projects and best practices.	Monthly	Ray DevRel
Twitter	For staying up-to-date on new features.	Daily	Ray DevRel