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SYSTEM-DESIGN-BASICS5 MIN READ

Choose Sync Or Async Boundaries

Make a converging sequence of design decisions for choose sync or async boundaries.

Pressure moment Maya must decide whether invoice generation blocks checkout even though the PDF vendor fails twice a week. The first fork determines every later trade-off. Decision walk Azure Cloud Design Patterns Follow invariant, boundary, and recovery in order. Shortcut Pick a tool first. A defensible recommendation 01 Invariant 02 Boundary 03 Recovery Step 1 What is the first call? Step 2

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