Say it like this
- We're using a pub/sub model for our notifications system.
- The team decided to implement pub/sub to scale the platform.
- Let's switch to pub/sub to decouple these services.
Use it at work
Architecture
- We use pub/sub so services don't call each other directly.
- The order service publishes an event, and others subscribe.
Debugging
- The subscriber isn't getting messages.
- Messages are stuck in the pub/sub topic.
Choosing tools
- Should we use Google Pub/Sub or Kafka?
- Pub/sub makes it easy to add new consumers.
Don't say this
Pub/sub is an architectural pattern, not an action. Use publish, deploy, or release instead.
Don't mix it up
| Term | What it is | Who writes or uses it | When |
|---|---|---|---|
| pub/sub | Many subscribers get each message | Backend engineers | Events |
| queue | One worker takes each message | Backend engineers | Jobs |
Practice
Try it
4 quick exercises
1. You are explaining the system design to a colleague. Which sentence sounds most natural?
2. In a _______ system, producers do not need to know about consumers.
3. Which sentence uses pub/sub incorrectly?
4. Rewrite using the term pub/sub: 'We want a system where the order service sends messages and the email service receives them without knowing about each other.'
Say it out loud
Phrase 1 of 3
"We're using a pub/sub model for our notifications system."
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More about pub/sub
Real examples(3)
- in a standup
"We migrated the order processing to a pub/sub system so the payment and inventory services can work independently."
- in a code review
"This pub/sub implementation needs to handle message ordering and ensure no events are lost."
- in a team meeting
"Using pub/sub will allow us to add new subscribers without modifying the publisher code."
More mistakes(2)
Handle with care. Pub/sub is a messaging pattern, not a task or action verb. Do not use it as 'we need to pub/sub this' to mean review or publish code. It refers to a specific architectural pattern.
- ✕The pub/sub handles all our data.✓The pub/sub system handles all our event messaging.
Be specific about what pub/sub does. It handles messaging and events, not general data.
- ✕Can you pub/sub this request?✓Can you publish this message to the event topic?
Pub/sub is not a verb action in this context. Be more specific about what you are asking.
Other forms(3)
- pub/sub noun
"The pub/sub architecture decouples our services."
- publisher noun
"The publisher sends messages to the topic."
- subscriber noun
"Each subscriber receives only the messages it cares about."
Often used with(5)
- pub/sub pattern · Used to describe the architectural design approach
- pub/sub system · Used to describe the infrastructure or platform implementing pub/sub
- pub/sub messaging · Used to emphasize the message-passing nature of the pattern
- publish to a topic · The action a publisher takes in pub/sub
- subscribe to a topic · The action a subscriber takes to receive messages
Similar words(3)
- event-driven architecture · Broader architectural approach; pub/sub is one way to implement it
- message broker · The infrastructure component that enables pub/sub; not a perfect synonym but closely related
- asynchronous messaging · Describes the communication style; pub/sub is a specific pattern for async messaging
Opposites(3)
- request-reply
- synchronous communication
- tightly coupled architecture
Questions(6)
- What is the full form of pub/sub?
- pub/sub stands for Publish-Subscribe. Pub/sub (publish-subscribe) is a messaging pattern where publishers send messages to a topic and subscribers receive those messages without directly communicating with each other.
- What does pub/sub mean in software engineering?
- Pub/sub stands for publish-subscribe. It is a messaging pattern where publishers send messages to topics and subscribers receive those messages. The key feature is that publishers and subscribers are decoupled; they do not need to know about each other or communicate directly.
- How do you use pub/sub in a sentence at work?
- You can say things like: 'We are using a pub/sub system for our notifications,' 'The architecture implements pub/sub messaging,' or 'We chose pub/sub to decouple the microservices.' Use it as a noun to describe the pattern or system, not as a verb.
- Is pub/sub formal or informal?
- Pub/sub is neutral and professional. It is standard terminology in tech discussions at all levels, from casual team conversations to formal architecture documents and job interviews. The abbreviation itself is informal compared to saying publish-subscribe, but both are acceptable in professional settings.
- What are real-world examples of pub/sub systems?
- Common pub/sub implementations include Apache Kafka, RabbitMQ, AWS SNS and SQS, Google Cloud Pub/Sub, Azure Service Bus, and Redis Pub/Sub. Each has different features and trade-offs, but they all follow the publish-subscribe pattern.
- Why is pub/sub important in microservices?
- Pub/sub is important in microservices because it allows services to communicate without tight coupling. Services can be updated, scaled, or replaced independently because they do not call each other directly. This makes systems more resilient, scalable, and easier to maintain.
