Struct WorkloadProfile 

pub struct WorkloadProfile {
    pub data_size: usize,
    pub dim: usize,
    pub requested_recall: f32,
    pub query_density: f32,
    pub k: usize,
}

Workload characteristics the cost model needs to estimate per-index cost.

data_size is the total number of indexed vectors; dim is the dimensionality; requested_recall is in [0.0, 1.0]; query_density expresses the expected fraction of the dataset that satisfies the query predicate (e.g. 1.0 = no filtering, 0.1 = 10% of data is candidate).

Fields

data_size: usize

Number of vectors currently indexed.

dim: usize

Vector dimensionality.

requested_recall: f32

Minimum acceptable recall (0.0 to 1.0).

query_density: f32

Expected fraction of data passing pre-filter (0.0 to 1.0).

Use 1.0 for unfiltered queries. Lower values indicate selective filters that should bias the optimizer toward indices that benefit from filtering (LSH and PQ degrade gracefully; HNSW does not).

k: usize

Number of nearest neighbours requested.

Implementations

impl WorkloadProfile

pub fn new(data_size: usize, dim: usize, requested_recall: f32) -> Self

Create a profile with sensible defaults: density=1.0 (unfiltered), k=10.

pub fn with_query_density(self, density: f32) -> Self

Set the query density (filter selectivity).

pub fn with_k(self, k: usize) -> Self

Set the number of nearest neighbours.

Trait Implementations

impl Clone for WorkloadProfile

fn clone(&self) -> WorkloadProfile

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WorkloadProfile

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WorkloadProfile

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for WorkloadProfile

fn eq(&self, other: &WorkloadProfile) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for WorkloadProfile

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for WorkloadProfile