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Cloud Computing · Advanced

Durable Functions

Azure Functions extension for writing stateful, long-running orchestrations in code.

Definition

Durable Functions use orchestrator, activity and entity functions with state checkpointed to storage. Common patterns include function chaining, fan-out/fan-in, async HTTP APIs, monitoring and human interaction (waiting for external events with timeouts).

Example

An orchestrator fans out to process 1,000 files in parallel and aggregates the results when all complete.

Exam tip

Durable Functions are the code-first answer for stateful serverless workflows; Logic Apps are the low-code alternative.

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