Ray: Unified framework for scaling AI and Python applications

https://readthedocs.org/projects/ray/badge/?version=master

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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

Older documents:

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

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Ray consists of a core distributed runtime and a set of AI libraries for simplifying ML compute:</p>\n<p><a target=\"_blank\" href=\"https://github.com/ray-project/ray/raw/master/doc/source/images/what-is-ray-padded.svg\"><img src=\"https://github.com/ray-project/ray/raw/master/doc/source/images/what-is-ray-padded.svg\" /></a></p>\n<p>Learn more about <a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-air/getting-started.html\">Ray AI Libraries</a>:</p>\n<ul>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/data/dataset.html\">Data</a>: Scalable Datasets for ML</li>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/train/train.html\">Train</a>: Distributed Training</li>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/tune/index.html\">Tune</a>: Scalable Hyperparameter Tuning</li>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/rllib/index.html\">RLlib</a>: Scalable Reinforcement Learning</li>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/serve/index.html\">Serve</a>: Scalable and Programmable Serving</li>\n</ul>\n<p>Or more about <a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-core/walkthrough.html\">Ray Core</a> and its key abstractions:</p>\n<ul>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-core/tasks.html\">Tasks</a>: Stateless functions executed in the cluster.</li>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-core/actors.html\">Actors</a>: Stateful worker processes created in the cluster.</li>\n<li><a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-core/objects.html\">Objects</a>: Immutable values accessible across the cluster.</li>\n</ul>\n<p>Learn more about Monitoring and Debugging:</p>\n<ul>\n<li>Monitor Ray apps and clusters with the <a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-core/ray-dashboard.html\">Ray Dashboard</a>.</li>\n<li>Debug Ray apps with the <a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-observability/ray-distributed-debugger.html\">Ray Distributed Debugger</a>.</li>\n</ul>\n<p>Ray runs on any machine, cluster, cloud provider, and Kubernetes, and features a growing\n<a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-overview/ray-libraries.html\">ecosystem of community integrations</a>.</p>\n<p>Install Ray with: <code>pip install ray</code>. For nightly wheels, see the\n<a target=\"_blank\" href=\"https://docs.ray.io/en/latest/ray-overview/installation.html\">Installation page</a>.</p>\n<a></a>\n<p></p><h2>Why Ray?</h2><a target=\"_blank\" href=\"https://github.com/ray-project/ray#why-ray\"></a><p></p>\n<p>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.</p>\n<p>Ray is a unified way to scale Python and AI applications from a laptop to a cluster.</p>\n<p>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.</p>\n<a></a>\n<p></p><h2>More Information</h2><a target=\"_blank\" href=\"https://github.com/ray-project/ray#more-information\"></a><p></p>\n<ul>\n<li><a target=\"_blank\" href=\"http://docs.ray.io/en/latest/index.html\">Documentation</a></li>\n<li><a target=\"_blank\" href=\"https://docs.google.com/document/d/1tBw9A4j62ruI5omIJbMxly-la5w4q_TjyJgJL_jN2fI/preview\">Ray Architecture whitepaper</a></li>\n<li><a target=\"_blank\" href=\"https://arxiv.org/abs/2203.05072\">Exoshuffle: large-scale data shuffle in Ray</a></li>\n<li><a target=\"_blank\" href=\"https://www.usenix.org/system/files/nsdi21-wang.pdf\">Ownership: a distributed futures system for fine-grained tasks</a></li>\n<li><a target=\"_blank\" href=\"https://arxiv.org/abs/1712.09381\">RLlib paper</a></li>\n<li><a target=\"_blank\" href=\"https://arxiv.org/abs/1807.05118\">Tune paper</a></li>\n</ul>\n<p><em>Older documents:</em></p>\n<ul>\n<li><a target=\"_blank\" href=\"https://arxiv.org/abs/1712.05889\">Ray paper</a></li>\n<li><a target=\"_blank\" href=\"https://arxiv.org/abs/1703.03924\">Ray HotOS paper</a></li>\n<li><a target=\"_blank\" href=\"https://docs.google.com/document/d/1lAy0Owi-vPz2jEqBSaHNQcy2IBSDEHyXNOQZlGuj93c/preview\">Ray Architecture v1 whitepaper</a></li>\n</ul>\n<a></a>\n<p></p><h2>Getting Involved</h2><a target=\"_blank\" href=\"https://github.com/ray-project/ray#getting-involved\"></a><p></p>\n<table>\n<thead>\n<tr><th>Platform</th>\n<th>Purpose</th>\n<th>Estimated Response Time</th>\n<th>Support Level</th>\n</tr>\n</thead>\n<tbody>\n<tr><td><a target=\"_blank\" href=\"https://discuss.ray.io/\">Discourse Forum</a></td>\n<td>For discussions about development and questions about usage.</td>\n<td>&lt; 1 day</td>\n<td>Community</td>\n</tr>\n<tr><td><a target=\"_blank\" href=\"https://github.com/ray-project/ray/issues\">GitHub Issues</a></td>\n<td>For reporting bugs and filing feature requests.</td>\n<td>&lt; 2 days</td>\n<td>Ray OSS Team</td>\n</tr>\n<tr><td><a target=\"_blank\" href=\"https://www.ray.io/join-slack?utm_source=github&amp;utm_medium=ray_readme&amp;utm_campaign=getting_involved\">Slack</a></td>\n<td>For collaborating with other Ray users.</td>\n<td>&lt; 2 days</td>\n<td>Community</td>\n</tr>\n<tr><td><a target=\"_blank\" href=\"https://stackoverflow.com/questions/tagged/ray\">StackOverflow</a></td>\n<td>For asking questions about how to use Ray.</td>\n<td>3-5 days</td>\n<td>Community</td>\n</tr>\n<tr><td><a target=\"_blank\" href=\"https://www.meetup.com/Bay-Area-Ray-Meetup/\">Meetup Group</a></td>\n<td>For learning about Ray projects and best practices.</td>\n<td>Monthly</td>\n<td>Ray DevRel</td>\n</tr>\n<tr><td><a target=\"_blank\" href=\"https://twitter.com/raydistributed\">Twitter</a></td>\n<td>For staying up-to-date on new features.</td>\n<td>Daily</td>\n<td>Ray DevRel</td>\n</tr>\n</tbody>\n</table>\n</article></div>",
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