All 7 Redis as a Message Queue questions
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How do you build a simple work queue using a Redis list where multiple workers pull tasks to process? What are the limitations of using a plain Redis list as a message queue, and when should you consider Redis Streams instead? How do you implement a priority queue pattern using Redis, where certain tasks should be processed before others? How do you monitor the length and health of a Redis based queue to ensure workers are keeping up with incoming tasks? How would you implement a delayed task queue in Redis, where a task should only become available for processing after a specific future time? What patterns help ensure exactly once or at least once processing semantics when using Redis as a message queue for critical tasks?
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What options does Redis offer for implementing a message queue, and how do they differ from each other?

Beginner

Answer

Redis offers simple lists combined with LPUSH and BRPOP for a basic first in first out queue, Pub/Sub for real time fire and forget messaging without persistence, and Streams for a more robust, log based messaging system with persistence, consumer groups, and message acknowledgment, each suited to different reliability and complexity needs.
-- Simple list based queue
LPUSH tasks 'process_order_123'
BRPOP tasks 30
Real-world example A small internal tool uses a simple Redis list as a lightweight task queue, while a larger, more critical order processing system uses Redis Streams for the stronger delivery guarantees it needs.

Common follow-ups: Which of these three approaches offers the strongest delivery guarantees?;How do you decide which approach is right for a specific use case?

Lists in Redis;Streams
All 7 Redis as a Message Queue questions