OpenWhisk is an event-driven compute platform also referred to as Serverless computing or as Function as a Service (FaaS) that runs code in response to events or direct invocations. The following figure shows the high-level OpenWhisk architecture.
Examples of events include changes to database records, IoT sensor readings that exceed a certain temperature, new code commits to a GitHub repository, or simple HTTP requests from web or mobile apps. Events from external and internal event sources are channeled through a trigger, and rules allow actions to react to these events.
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