Why it matters

CQRS enables independent read/write optimization. Understanding shapes complex-model systems.

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The architecture

Command side: write model. Handles mutations.

Query side: read model. Optimized for queries.

CQRS structureCommand modelwritesEvent streampropagates changesQuery modelreads, denormalizedRead model can lag; embrace eventual consistency
CQRS separation.
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How it works end to end

Sync: events propagate from write to read.

Read model: denormalized for query.

Multiple read models: per query pattern.

Complexity: worth it only for complex domains.