Hi all, I wonder how I can set the row group size for files generated by ParquetIO.Sink <https://beam.apache.org/releases/javadoc/2.20.0/org/apache/beam/sdk/io/parquet/ParquetIO.Sink.html>. It doesn't seem to provide the option for setting that and IIUC from the code <https://github.com/apache/beam/blob/fffb85a35df6ae3bdb2934c077856f6b27559aa7/sdks/java/io/parquet/src/main/java/org/apache/beam/sdk/io/parquet/ParquetIO.java#L1117>, it uses the default value in ParquetWriter.Builder <https://github.com/apache/parquet-mr/blob/bdf935a43bd377c8052840a4328cf5b7603aa70a/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetWriter.java#L636> which is 128MB. Is there any reason not to expose this parameter in ParquetIO?
Thanks -B
