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| Setting | Description |
|---|---|
Compression Codec | The compression algorithm used to compress pages when encoding. Valid choices are Uncompressed, Snappy, Gzip, Lzo, Brotli, Lz4, and Zstd. Default is Uncompressed. |
Block Size | The Block Size is the size of a row group buffered in memory. Block size limits the memory usage when writing. Larger values improves improve I/O when reading, but consumes more memory when writing. The Default Block Size is 134217728. |
| Page Size | The page is the smallest unit that must be read fully to access a single record. When reading, each page can be decompressed independently. If this value is too small, the compression deteriorates. The Default Page Size is 1048576. |
| Dictionary Page Size | There is one dictionary page per column per row group when dictionary encoding is used. Dictionary page size works like the page size, but for dictionary encoding. Default is 1048576. |
| Enable Dictionary | Select this checkbox to include the dictionary compression strategy in the generated Parquet document. Enable Dictionary allows for building a dictionary of values encountered in columns. |
| Validating | Select this checkbox to enable schema validation. |
| Writer Version | Parquet format version to use when writing. Version 1.0 (v1) ensures compatibility with older readers. Default is v1. There is also the option to set v2. |
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