Parquet is a columnar storage type whereas Avro is row-oriented serialization framework. If you have lots of columns and want to perform ad-hoc analysis, Parque

Parquet is a columnar storage type whereas Avro is row-oriented serialization framework. If you have lots of columns and want to perform ad-hoc analysis, Parquet will be better than Avro due to the mechanics of the columnar storage types.