Amazon Managed Service for Apache Flink was previously known as Amazon Kinesis Data Analytics for Apache Flink.
Using Asynchronous I/O in Managed Service for Apache Flink
An Asynchronous I/O operator enriches stream data using an external data source such as a database. Managed Service for Apache Flink enriches the stream events asynchronously so that requests can be batched for greater efficiency.
For more information, see Asynchronous I/O
