A course · driven from your phone

Message Queues, SQS-first

Built around one goal: understand the SQS in your ZenRows project well enough to read it and know, not guess. Every lesson grounds in scraping jobs. Other brokers show up only to sharpen why SQS chose what it did.

Lessons

• LESSON 1 The SQS mental model & visibility timeout A message is borrowed, never just read. The lifecycle, the borrow clock, and the two failure modes that explain everything else.
• LESSON 2 At-least-once & idempotency: making duplicates boring Guard vs converge, the ack contract, and a tour of your real task.go guards. Why conveyor skips FIFO and pays for correctness instead.
• LESSON 3 · NEXT Long vs short polling: the receive loop Coming next — why the control queue long-polls and the per-run queues short-poll, and what empty receives cost.

Reference

Living documents you'll come back to: Glossary · Mission · Trusted resources

I'm your teacher here — ask me anything that's unclear, and tell me when you want the next lesson.