apache / apache/beam

Enable block size support in ParquetIO

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ideas improvement io java P3 parquet
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Description

Parquet API allows block size support, which can improve IO performance when working with Parquet files. Currently, the ParquetIO does not support it at all so it looks like a room for improvement for this IO.

Good intro into this topic: [https://www.dremio.com/tuning-parquet/](https://www.dremio.com/tuning-parquet/) 

Imported from Jira [BEAM-4383](https://issues.apache.org/jira/browse/BEAM-4383). Original Jira may contain additional context.
Reported by: ŁukaszG.

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