NSQ

• Source: https://github.com/nsqio/nsq
• License: MIT
• Alternatives: RabbitMQ, Apache Kafka, NATS, Redis Streams
• Status: Replaced by RabbitMQ (MQTT)

Queue service. Allows responding to events in a distributed way — publishers like MinIO don't need to know about subscribers, so you can create N subscribers that respond to file events without changing MinIO.