Why it matters

DB choice shapes app architecture. Understanding shapes cloud decisions.

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The architecture

Spanner: global SQL + strong consistency.

Aurora: familiar MySQL/Postgres at scale.

Cloud DB landscapeSpannerglobal SQLAuroraMySQL/PostgresCosmos DB / DynamoDBNoSQLAurora Serverless auto-scales; Cosmos multi-model
Cloud DB options.
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How it works end to end

Spanner: horizontal + strong consistency.

Aurora: replicas for scale.

Cosmos DB: multi-model + multi-region.

DynamoDB: serverless KV.