Struct DeltaBinaryPackedEncoderOptions 

pub struct DeltaBinaryPackedEncoderOptions {
    block_size: usize,
    mini_blocks_per_block: usize,
}

Controls the block layout emitted by [DeltaBitPackEncoder] and the integer sub-encoders used by [DeltaLengthByteArrayEncoder] and [DeltaByteArrayEncoder].

In the Parquet DELTA_BINARY_PACKED encoding, each block records a minimum delta and each mini block records its own bit width. The defaults use 128 values per block and 4 mini blocks for INT32, and 256 values per block and 4 mini blocks for INT64.

Smaller blocks or mini blocks can reduce encoded size for bursty data, where the required bit width changes over short ranges, and for short pages that would otherwise need more padding. They also add more minimum-delta and bit-width metadata. Larger blocks or mini blocks can reduce that metadata and block-processing overhead for long inputs with stable delta distributions, improving compression or throughput, but an outlier then affects more values and the encoder uses a larger scratch buffer. Benchmark representative data before changing the defaults.

The format requires block sizes to be multiples of 128 and mini block sizes to be multiples of 32.

Fields

block_size: usize

mini_blocks_per_block: usize

Implementations

impl DeltaBinaryPackedEncoderOptions

pub fn try_new(block_size: usize, mini_blocks_per_block: usize) -> Result<Self>

Creates validated delta binary packed encoder options.

pub fn block_size(&self) -> usize

Returns the number of values in each block.

pub fn mini_blocks_per_block(&self) -> usize

Returns the number of mini blocks in each block.

Trait Implementations

impl Clone for DeltaBinaryPackedEncoderOptions

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DeltaBinaryPackedEncoderOptions

impl Debug for DeltaBinaryPackedEncoderOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for DeltaBinaryPackedEncoderOptions

impl PartialEq for DeltaBinaryPackedEncoderOptions

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DeltaBinaryPackedEncoderOptions