Struct IVFPQIndex

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pub struct IVFPQIndex {
    pub ivf: IVFIndex,
    pub pq: ProductQuantizer,
    pub codes: Vec<u8>,
}

Expand description

Combined IVF-PQ search: IVF narrows candidates, PQ makes distance fast.

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§ivf: IVFIndex§pq: ProductQuantizer§codes: Vec<u8>

PQ codes for all vectors: [n_vectors * pq.num_subvectors].

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impl IVFPQIndex

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pub fn build( vectors: &[Vec<f32>], dim: usize, num_clusters: usize, num_subvectors: usize, num_centroids: usize, ) -> Self

Build a combined IVF-PQ index.

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pub fn search( &self, query: &[f32], vectors: &[Vec<f32>], norms: &[f32], tombstones: &[u8], nprobe: usize, candidates: usize, k: usize, ) -> Vec<(usize, f32)>

Search using IVF to narrow clusters, then PQ for fast approximate distance, then re-rank top candidates with exact cosine.

Auto Trait Implementations§

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impl UnwindSafe for IVFPQIndex

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