This chapter is an outline. The curriculum, learning objectives and
structure are settled; the prose, diagrams and code are still being written.
What is below is the plan for the chapter, not the chapter.
SQS — One Page Summary
Read time: 2 min
The first document to open. Everything essential about SQS on a single screen.
Planned contents
- The one-sentence definition
- The three API calls
- The lifecycle state machine (one diagram)
- Standard vs FIFO in four rows
- Visibility timeout in two sentences
- Why duplicates happen, and the fix
- The four settings every production queue changes
- The three metrics that matter
- The five sentences that are wrong
Design rules for this sheet
- Tables, diagrams and bullets. Prose only where a sentence genuinely beats a row
- Scannable at a glance; printable on a laptop screen
- Every quota and price links to
_reference/aws-facts.md - It answers "remind me", not "teach me" — the course body does the teaching
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