Nats queueing.
An example of using NATS for queue messaging.
Nats queueing. NATS Queueing Walkthrough NATS supports a form of load balancing using queue groups. An integrated subsystem providing distributed persistence. NATS supports message NATS is a publish and subscribe system that also has distributed queueing functionality on a per subscriber basis. 复制 NATS Concepts Queue Groups NATS provides a built-in load balancing feature called distributed queues. To create a queue subscription, subscribers register a queue name. Sign-up for the NATS Monthly Newsletter to get all the updates! The core messaging capabilities of NATS including pub-sub, request-reply, and queue groups. When you publish a message, for instance at the beginning of a request, every subscriber will receive the message. Code below demonstrates multiple subscriptions on the same queue group, receiving messages randomly distributed among them. Jul 23, 2025 · Here in this article we will try to understand about Queue Groups and how we can leverge it to load balance traffic between responders in a queue. The application simply includes a queue name with the subscription. NATS is a connective technology powering modern distributed systems, unifying Cloud, On-Premise, Edge, and IoT. An example of using NATS for queue messaging. This retention policy supports queuing up messages from publishers independent of consummption. In NATS supports a form of load balancing using queue groups. Since each message is intended to be processed only once, this retention type allows for a set of consumers that have non-overlapping interest on subjects. NATS provides an additional feature named "queue", which allows subscribers to register themselves as part of a queue. Subscribers register a queue group name. The queue is subscribed to by one-to-many clients and each message is received by only a single client. Topics related to authentication and authorization. A work-queue retention policy satisfies a very common use case of queuing up messages that are intended to be processed once and only once. . A single subscriber in the group is randomly selected to receive the message. This example starts a service that publishes CPU metrics every second to a metrics-queue subject and queue group queuegroup1. Sep 5, 2023 · According to the NATS official website, when using a globally deployed NATS cluster, it is possible to configure message routing to go to nearby subscribers using the “get-affinity” method. You can at any time start yet another service instance, or kill one and see how the queue-group automatically takes care of adding/removing those instances from the group. Subscribers that are part of a queue, form the "queue group". Subscribing to a queue group is only slightly different than subscribing to a subject alone. Using queue subscribers will balance message delivery across a group of subscribers which can be used to provide application fault tolerance and scale workload processing. naqzyaarmliwoxxejwivjmsrziwhxtufkycaziulsukuldkrsubs