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Flink FileSink 自定义输出路径——BucketingSink
https://blog.csdn.net/anfuyi5792/article/details/102317285

Flink FileSink 自定义输出路径——StreamingFileSink、BucketingSink 和 StreamingFileSink简单比较

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https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/connectors/file_sink.html

StreamingFileSink 不将数据摄取到 s3