06
Concepts
Messaging
Queues, brokers, and delivery semantics. The layer between services that determines whether your system is reliable or just fast.
Fundamentals
Message queues, task queues, pub/sub, delivery guarantees, DLQs, ordering, delay queues, and fan-out patterns.
Pub/SubDelivery GuaranteesDLQFan-Out
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SQS
Standard vs FIFO queues, visibility timeouts, idempotency, DLQ wiring, scaling, and SNS fan-out patterns.
Standard vs FIFOVisibility TimeoutSNS Fan-OutDLQ
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RabbitMQ
Exchange types, ACK/NACK, prefetch, durable queues, retry strategies, and where RabbitMQ beats simpler queues.
ExchangesACK/NACKPrefetchDurable Queues
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