Скачать или смотреть CQRS Separating read write models for scalability

CQRS (Command Query Responsibility Segregation) sounds fancy, but it’s simple: separate how you write data from how you read it.

Commands change state. Queries return state. Splitting them removes friction and boosts performance.
Think airport check-in: one counter for baggage drop (writes), another for boarding passes (reads). Different needs, different lines.
Write side handles validation, domain rules, and persisting data.Read side is optimized views, denormalised, cached, fast.
As writes happen, publish events. Projections update read models asynchronously. Eventual consistency by design.
In a trading app: placing an order hits the write model with risk checks; portfolio screens hit read models tuned for speed. Spikes in market traffic? Scale reads without touching writes.
Use CQRS when reads and writes have very different performance or scalability needs or when domains are complex.
Extra moving parts: projections, events, sync issues. Start simple; add CQRS where it pays off.
CQRS = clarity and speed. Separate concerns, scale independently, ship confidently.
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