RabbitMQ

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What is RabbitMQ?
RabbitMQ is an open-source message broker for reliable, scalable communication between applications.

RabbitMQ is an implementation of the AMQP message model (Advanced Message Queueing Protocol) Version 091.

RabbitMQ is an open-source message broker that enables reliable, scalable, and asynchronous communication between distributed applications.

Advantages of RabbitMQ:
Background Processing:
 - Ideal for handling long-running tasks such as processing uploads on web servers, where users can continue with additional tasks while processing occurs in the background.
Control:
 - Developers can define how messages move through the system using message metadata, rather than relying solely on broker administrators.
Cross-Language Communication:
 - Messages produced in one language can be consumed by applications in different languages, enhancing versatility.
Message Acknowledgements:
 - Ensures message delivery by keeping messages in the queue until receipt is acknowledged by consumers, preventing loss.
Microservices Communication:
 - Acts as a middleman for communication between microservices, enabling seamless message passing and avoiding bottlenecks.
Priority Queueing:
 - Supports priority queues for tasks like batch processing, allowing immediate processing of high-priority tasks rather than waiting for scheduled jobs.

Limitations:
Message Persistence:
 - Messages are removed from the queue once delivered, unlike systems like Apache Kafka where messages can be persisted for specified retention periods, potentially limiting future insights.
Vertical Scaling:
 - RabbitMQ scales vertically, requiring more powerful hardware for increased throughput, unlike Kafka which scales horizontally by adding more machines.
Traditional Messaging:
 - Designed for traditional messaging rather than streaming, limiting its ability to handle massive volumes of data like Kafka.
Memory Management:
 - Stores messages in memory until space is exhausted, impacting performance, whereas Kafka is designed for wider scalability and can handle trillions of messages.
High Throughput Limitation:
 - Not optimized for high throughput as it lacks message batching support and processes one message at a time.

Real-World Use Cases of RabbitMQ
Companies that use RabbitMQ include Amazon, Microsoft, Apple, Deloitte, Google, Citi, LinkedIn, Credit Suisse, Robinhood, Reddit, and more.

Alternatives to RabbitMQ
 - Kafka: Great for handling large volumes of data and real-time processing.
 - ActiveMQ: Reliable and supports multiple messaging protocols. 
 - SQS (Simple Queue Service): Message queuing service provided by AWS.
 - RedHat: Offers messaging solutions like Red Hat AMQ, which is based on ActiveMQ.
 - ZeroMQ: Lightweight and designed for high-performance messaging.


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