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Apache Kafka: what it is, when to use it, and its key trade-offs

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Apache Kafka is an open-source distributed messaging system that stores data streams in a durable, ordered, and fault-tolerant manner. Messaging platforms like Kafka allow multiple systems to exchange information asynchronously through an intermediary, without services calling each other directly. Kafka stands out from traditional brokers such as RabbitMQ and SQS because messages persist after being consumed, making it well suited for high-volume, real-time scenarios like e-commerce order processing and IoT sensor networks. Among its main advantages are high throughput, real-time processing, resilience, and support for multiple simultaneous consumers. However, Kafka can be overkill for low-traffic applications and carries a steep learning curve along with significant configuration and operational complexity.

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