Querying Parquet with Millisecond Latency Note: this article was originally published on the InfluxData Blog. We believe that querying data in Apache Parquet files directly can achieve similar or better storage efficiency and query performance than most specialized file formats. While it requires significant engineering effort, the benefits of Parquet's open format and broad ecosystem support make it the obvious choice for a wide class of data systems. In this article we explain several advanced techniques needed to query data stored in the Parquet format quickly that we implemented in the Apache Arrow Rust Parquet reader. Together these techniques make…