Enum BackendConfig 

pub enum BackendConfig {
    Hnsw {
        m: usize,
        ef_construction: usize,
        distance_metric: DistanceMetric,
        is_compact: bool,
        is_recompute: bool,
        num_threads: usize,
        seed: Option<u64>,
    },
}

Backend-specific build configuration.

Each variant holds all parameters needed to build an index with that backend.

Variants

Hnsw

Fields

m: usize

ef_construction: usize

distance_metric: DistanceMetric

is_compact: bool

is_recompute: bool

num_threads: usize

seed: Option<u64>

Implementations

impl BackendConfig

pub fn hnsw_default() -> Self

Default HNSW configuration (matches HnswConfig::default()).

pub fn from_name(name: &str) -> Result<Self>

Create a default config for the given backend name.

pub fn name(&self) -> &str

Backend name string (for serialization into IndexMeta).

pub fn distance_metric(&self) -> DistanceMetric

Distance metric for this backend configuration.

pub fn set_distance_metric(&mut self, metric: DistanceMetric)

Set the distance metric.

pub fn set_m(&mut self, val: usize)

Set M parameter (HNSW only).

pub fn set_ef_construction(&mut self, val: usize)

Set efConstruction parameter (HNSW only).

pub fn set_compact(&mut self, val: bool)

Set compact mode (HNSW only).

pub fn set_recompute(&mut self, val: bool)

Set recompute mode (HNSW only).

pub fn set_num_threads(&mut self, val: usize)

Set number of build threads (HNSW only).

pub fn to_backend_kwargs(&self) -> HashMap<String, Value>

Convert to backend_kwargs map for IndexMeta serialization.

pub fn to_hnsw_config(&self) -> HnswConfig

Extract an HnswConfig from this configuration (panics if not HNSW).

pub fn is_compact(&self) -> bool

Whether this config uses compact storage.

pub fn is_recompute(&self) -> bool

Whether this config uses recompute mode.

Trait Implementations

impl Debug for BackendConfig

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

Formats the value using the given formatter.