Introduction to Consumer Groups
Understand how Consumer Groups enable multiple consumers to process a stream cooperatively and reliably.
What are Consumer Groups?
Redis Streams are powerful for logging and event sourcing. But what if multiple applications or instances need to process the same stream data, without duplicating work?
This is where Consumer Groups come in. They are a core feature of Redis Streams designed for reliable, shared message processing.
The Challenge: Multiple Readers
Imagine two services, Service A and Service B, both needing to process every new order from an orders_stream.
If both services simply use XREAD, they would both receive and process all messages, leading to duplicated effort or inconsistent states.
- How do they know which messages are already processed?
- How do they share the workload?
All lessons in this course
- Introduction to Consumer Groups
- Implementing Consumer Group Logic
- Handling Pending Messages & Failures
- Monitoring Consumer Group Lag