[jira] [Created] (FLINK-6199) Single outstanding Async I/O operation per key

[Shang Yuanchun (Jira)]

Jamie Grier created FLINK-6199:
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             Summary: Single outstanding Async I/O operation per key
                 Key: FLINK-6199
                 URL: https://issues.apache.org/jira/browse/FLINK-6199
             Project: Flink
          Issue Type: Improvement
          Components: DataStream API
            Reporter: Jamie Grier


I would like to propose we extend the Async I/O semantics a bit such that a user can guarantee a single outstanding async request per key.

This would allow a user to order async requests per key while still achieving the throughput benefits of using Async I/O in the first place.

This is essential for operations where stream order is important but we still need to use Async operations to interact with an external system in a performant way.



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