Struct SpannConfig 

pub struct SpannConfig {
    pub dimension: usize,
    pub num_partitions: Option<usize>,
    pub use_pq: bool,
    pub num_probes: usize,
    pub kmeans_iterations: usize,
    pub distance_metric: DistanceMetric,
    pub min_partition_size: usize,
    pub max_partition_size: usize,
}

SPANN configuration

Fields

dimension: usize

Vector dimension

num_partitions: Option<usize>

Number of partitions (default: √n, set during build)

use_pq: bool

Enable PQ compression (32x storage reduction, ~5% recall loss)

num_probes: usize

Number of partitions to probe during search (default: 10)

kmeans_iterations: usize

K-means iterations for clustering

distance_metric: DistanceMetric

Distance metric

min_partition_size: usize

Minimum vectors per partition before merge

max_partition_size: usize

Maximum vectors per partition before split

Implementations

impl SpannConfig

pub fn minilm() -> Self

Create config for MiniLM embeddings (384 dims)

pub fn clip() -> Self

Create config for CLIP embeddings (768 dims)

pub fn compute_partitions(&self, num_vectors: usize) -> usize

Compute optimal partition count for dataset size

Trait Implementations

impl Clone for SpannConfig

fn clone(&self) -> SpannConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SpannConfig

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

Formats the value using the given formatter.

impl Default for SpannConfig

fn default() -> Self

Returns the “default value” for a type.