Struct DiskAnnConfig 

pub struct DiskAnnConfig {

    pub dimension: usize,
    pub max_degree: usize,
    pub build_beam_width: usize,
    pub search_beam_width: usize,
    pub alpha: f32,
    pub pruning_strategy: PruningStrategy,
    pub search_mode: SearchMode,
    pub max_vectors_in_memory: Option<usize>,
    pub use_pq_compression: bool,
    pub pq_subvectors: Option<usize>,
    pub pq_bits: Option<u8>,
    pub enable_incremental_updates: bool,
    pub num_entry_points: usize,
    pub io_buffer_size: usize,
}

Configuration for DiskANN index

Fields

dimension: usize

Vector dimensionality

max_degree: usize

Maximum degree of graph nodes (R parameter)

build_beam_width: usize

Beam width for graph construction (L parameter)

search_beam_width: usize

Beam width for search (L_search parameter)

alpha: f32

Alpha parameter for pruning (typically 1.2)

pruning_strategy: PruningStrategy

Pruning strategy

search_mode: SearchMode

Search mode

max_vectors_in_memory: Option<usize>

Maximum number of vectors to keep in memory

use_pq_compression: bool

Use PQ compression for disk storage

pq_subvectors: Option<usize>

Number of PQ sub-vectors (if compression enabled)

pq_bits: Option<u8>

Number of bits per PQ code

enable_incremental_updates: bool

Enable incremental updates

num_entry_points: usize

Number of entry points for search

io_buffer_size: usize

Buffer size for disk I/O (bytes)

Implementations

impl DiskAnnConfig

pub fn default_config(dimension: usize) -> Self

Create default configuration

pub fn memory_optimized(dimension: usize) -> Self

Create configuration optimized for memory

pub fn speed_optimized(dimension: usize) -> Self

Create configuration optimized for speed

pub fn billion_scale(dimension: usize) -> Self

Create configuration for billion-scale datasets

pub fn validate(&self) -> Result<(), String>

Validate configuration

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

Get memory estimate for index (in bytes)

Trait Implementations

impl<'__de, __Context> BorrowDecode<'__de, __Context> for DiskAnnConfig

fn borrow_decode<__D: BorrowDecoder<'__de, Context = __Context>>( decoder: &mut __D, ) -> Result<Self, DecodeError>

Attempt to decode this type with the given BorrowDecode.

impl Clone for DiskAnnConfig

fn clone(&self) -> DiskAnnConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiskAnnConfig

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

Formats the value using the given formatter.

impl<__Context> Decode<__Context> for DiskAnnConfig

fn decode<__D: Decoder<Context = __Context>>( decoder: &mut __D, ) -> Result<Self, DecodeError>

Attempt to decode this type with the given Decode.

impl Default for DiskAnnConfig

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DiskAnnConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for DiskAnnConfig

fn encode<__E: Encoder>(&self, encoder: &mut __E) -> Result<(), EncodeError>

Encode a given type.

impl Serialize for DiskAnnConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.