Pub/Sub

Publish-Subscribe

Google Cloud Pub/Sub, often referred to as just Pub/Sub, is a messaging service provided by Google Cloud for building event-driven systems and real-time data analytics. It enables asynchronous communication between different components or services in a distributed system. Here’s an overview of its key features and how it works:

1. Publish-Subscribe Model: Pub/Sub follows the publish-subscribe messaging pattern. In this model, publishers send messages to topics, and subscribers receive messages from those topics. There can be multiple subscribers, and they can independently process the messages they receive.
2. Distributed and Scalable: Pub/Sub is designed to be highly scalable and distributed. It can handle large volumes of messages and adapt to changes in load without manual intervention.
3. Reliable and At-Least-Once Delivery: It ensures reliable message delivery by using acknowledgments. Messages are delivered to subscribers at least once, and acknowledgments are returned to the service to confirm the successful receipt and processing of messages.
4. Low Latency: Pub/Sub is designed for low-latency message delivery, making it suitable for real-time applications and data processing.
5. Integration with Google Cloud Services: Pub/Sub seamlessly integrates with other Google Cloud services, such as Cloud Functions, Dataflow, and BigQuery, allowing you to build event-driven applications and data pipelines.
6. Message Filtering: It supports filtering messages based on attributes, allowing subscribers to receive only messages that match specific criteria.
7. Dead Letter Queues: Pub/Sub includes Dead Letter Queues (DLQs) to handle messages that couldn’t be successfully processed after multiple delivery attempts. This helps in handling failed messages gracefully.
8. Global Availability: Pub/Sub is available in multiple Google Cloud regions, providing global availability and redundancy for your messaging infrastructure.

Typical use cases for Google Cloud Pub/Sub include:

• Real-time data analytics and processing.
• Event-driven microservices architecture.
• Decoupling components in a distributed system.
• Logging and monitoring.
• IoT (Internet of Things) data ingestion and processing.
• Pub/Sub can also be used for building custom workflows and automation in response to events.

Google Cloud Pub/Sub is a versatile messaging service that enables building scalable, decoupled, and event-driven systems in the Google Cloud environment.

• Abbreviation: Pub/Sub