tustvold opened a new issue, #2282: URL: https://github.com/apache/arrow-rs/issues/2282
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] (This section helps Arrow developers understand the context and *why* for this feature, in addition to the *what*) --> The DeltaBitPackEncoder has a couple of parameters that users may wish to override, in particular: * Block size - the number of values per block (default: 128) * Miniblock count - the number of miniblocks per block (default: 4) These defaults result in 32 elements per miniblock, the smallest possible. Small miniblocks may lead to smaller representation as the bit width is per miniblock, similarly small blocks may lead to smaller representation as the min delta is per block. However, for input data with a uniform distribution, larger blocks may yield better compression and faster decode. See [here](https://github.com/apache/parquet-format/blob/master/Encodings.md#delta-encoding-delta_binary_packed--5) for more information on what these parameters control **Describe the solution you'd like** <!-- A clear and concise description of what you want to happen. --> `ColumnProperties` currently allows setting `Encoding` for a specific column, we should provide the ability to control the settings passed to the DeltaBitPackEncoder. **Describe alternatives you've considered** <!-- A clear and concise description of any alternative solutions or features you've considered. --> **Additional context** <!-- Add any other context or screenshots about the feature request here. --> #2276 adds vectorised unpacking of runs of 64x 64-bit numbers, however, this would need miniblocks containing 64 elements to benefit from this -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
