Sync vs Async Decision

← Back to When to Choose What

Choose sync (HTTP/gRPC) when low latency is needed, for simple request-response, and when strong consistency is required. Choose async (queues/events) for decoupled services, eventual consistency, spike traffic handling, and long-running tasks.

Key Properties

• Latency Requirements
• Consistency Requirements
• Traffic Pattern Factor

Related

• Inter-Service Communication (implementation)

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tradeoffs decision sync async