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Cloud Computing · Intermediate

AWS Step Functions

AWS serverless workflow service that orchestrates Lambda functions and AWS services as visual state machines.

Definition

Step Functions defines workflows in Amazon States Language with states for tasks, choices, parallel branches, maps, waits, retries and error handling. Standard workflows run up to one year with exactly-once execution; Express workflows are high-volume, short (up to five minutes) and at-least-once.

Example

An order workflow validates payment, reserves inventory in parallel and retries failed steps automatically.

Exam tip

Step Functions is the answer for orchestrating multi-step serverless processes with retries and long durations beyond Lambda's limit.

Related terms