Watch RethinkConn 2025 - a free, virtual event for the NATS community! See what you missed!| docs.nats.io
This guide is tailored for existing NATS users upgrading from NATS version v2.10.x. This will read as a summary with links to specific documentation pages to learn more about the feature or improvement.| docs.nats.io
The NATS server supports authorization using subject-level permissions on a per-user basis. Permission-based authorization is available with multi-user authentication via the users list.| docs.nats.io
When subscribers register themselves to receive messages from a publisher, the 1:N fan-out pattern of messaging ensures that any message sent by a publisher, reaches all subscribers that have registered. NATS provides an additional feature named "queue", which allows subscribers to register themselves as part of a queue. Subscribers that are part of a queue, form the "queue group".| docs.nats.io
NATS is a system for publishing and listening for messages on named communication channels we call Subjects. Fundamentally, NATS is an interest-based messaging system, where the listener has to subscribe to a subset of subjects.| docs.nats.io