SQS (Simple Queue Service) এবং SNS (Simple Notification Service) হল AWS মেসেজিং সেবা যা অ্যাপ্লিকেশন কম্পোনেন্টগুলির মধ্যে decoupled, asynchronous যোগাযোগ সক্ষম করে। SQS একটি মেসেজ কিউ (one-to-one প্রসেসিং); SNS হল pub/sub (one-to-many broadcast)।
SQS — মেসেজ কিউ (decoupling, async প্রসেসিং)
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SQS is a managed message QUEUE: producers send messages, consumers process them:
→ producer → [QUEUE] → consumer(s) process messages (at their own pace)
→ DECOUPLES components (producer doesn't wait for/depend on the consumer)
→ BUFFERS load (queue absorbs spikes; consumers process steadily)
→ RELIABLE (messages persist until processed; retries; dead-letter queues for failures)
→ SCALABLE (add more consumers to process faster)
→ Use for: async task processing, decoupling services, smoothing load spikes