"Serverless invocation types: synchronous (request/response; errors returned to and retries required by the client); asynchronous (event sent by client then disconnected; event on a queue for the serverless function, serverless function called N times or M seconds - configurable, dependent on throttling - then sent to dead letter queue or on-failure destination if not processed; can route based on success and failure); stream-based (pushed in batches synchronously from eg Kinesis or DynamoDB with retries N times or M seconds; need to handle batches that have one bad event somehow, preferably from the cloud capability eg BisectBatchOnFunctionError); poller-based (poller pulls synchronously from a queue, probably in batches)"
