ASF GitHub Bot commented on FLINK-8571:

Github user aljoscha commented on a diff in the pull request:

    --- Diff: docs/dev/api_concepts.md ---
    @@ -896,3 +896,54 @@ result type ```R``` for the final result. E.g. for a 
histogram, ```V``` is a num
     {% top %}
    +## EXPERIMENTAL: Reinterpreting a pre-partitioned data stream as keyed 
    --- End diff --
    It might be better to add a dedicated "experimental" section in the 
DataStream API documentation for this. What do you think?

> Provide an enhanced KeyedStream implementation to use ForwardPartitioner
> ------------------------------------------------------------------------
>                 Key: FLINK-8571
>                 URL: https://issues.apache.org/jira/browse/FLINK-8571
>             Project: Flink
>          Issue Type: Improvement
>            Reporter: Nagarjun Guraja
>            Assignee: Stefan Richter
>            Priority: Major
> This enhancement would help in modeling problems with pre partitioned input 
> sources(for e.g. Kafka with Keyed topics). This would help in making the job 
> graph embarrassingly parallel while leveraging rocksdb state backend and also 
> the fine grained recovery semantics.

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