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Parquet vs Avro Format |
Avro is a row-based storage format for Hadoop.
Parquet is a column-based storage format for Hadoop.
If your use case typically scans or retrieves all of the fields in a row in each query, Avro is usually the best choice.
If your dataset has many columns, and your use case typically involves working with a subset of those columns rather than entire records, Parquet is optimized for that kind of work.