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https://issues.apache.org/jira/browse/FLINK-16903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17073465#comment-17073465
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Jark Wu commented on FLINK-16903:
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I think in the long term, {{SupportsCustomParallelism}} is needed to inference
a default parallelism of source and sink, e.g. use the number of Kafka
partitions. So I'm +1 to this way. But I would like to call it
{{SupportsReportSplits}} or {{SupportsReportPartitions}}, so it can be used not
only for specifying a parallelism, but can also be used as a max-parallelism.
> Add sink.parallelism for file system factory
> --------------------------------------------
>
> Key: FLINK-16903
> URL: https://issues.apache.org/jira/browse/FLINK-16903
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Runtime
> Reporter: Jingsong Lee
> Priority: Major
> Fix For: 1.11.0
>
>
> A single task may be writing multiple files at the same time. If the
> parallelism is too high, it may lead to a large number of small files. If the
> parallelism is too small, the performance is not enough. This requires that
> the user can specify parallelism.
> * Default is the same as upstream transformation
> * Users can specify parallelism too.
> |‘connector.sink.parallelism’ = ...|
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