Enum IndexBackend 

pub enum IndexBackend {
    Hnsw,
    DiskAnn {
        graph_path: PathBuf,
    },
}

Selectable vector index backend for SemanticRouter.

Choose based on dataset size and storage constraints:

• HNSW — fully in-memory, optimal for ≤ 10 M vectors.
• DiskANN — memory-mapped graph; handles 100 M+ vectors with bounded RAM.

Variants

Hnsw

HNSW (default) — in-memory, fast search with high recall.

DiskAnn

DiskANN — disk-backed graph index for massive-scale datasets.

Fields

graph_path: PathBuf

Path at which the DiskANN graph file is created or opened.

Trait Implementations

impl Clone for IndexBackend

fn clone(&self) -> IndexBackend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndexBackend

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

Formats the value using the given formatter.

impl Default for IndexBackend

fn default() -> IndexBackend

Returns the “default value” for a type.