ssdhelpers

package
v1.22.2 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Nov 1, 2023 License: BSD-3-Clause Imports: 11 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Concurrently 

func Concurrently(n uint64, action Action)

func ExtractCode8 added in v1.20.0 

func ExtractCode8(encoded []byte, index int) byte

Only made public for testing purposes... Not sure we need it outside

func PutCode8 added in v1.20.0 

func PutCode8(code byte, buffer []byte, index int)

Only made public for testing purposes... Not sure we need it outside

Types

type Action 

type Action func(taskIndex uint64)

type Centroid 

type Centroid struct {
	Center     []float32
	Calculated atomic.Bool
}

type DLUTPool added in v1.19.6 

type DLUTPool struct {
	// contains filtered or unexported fields
}

func NewDLUTPool added in v1.19.6 

func NewDLUTPool() *DLUTPool

func (*DLUTPool) Get added in v1.19.6 

func (p *DLUTPool) Get(segments, centroids int, centers []float32) *DistanceLookUpTable

func (*DLUTPool) Return added in v1.19.6 

func (p *DLUTPool) Return(dlt *DistanceLookUpTable)

type DistanceLookUpTable 

type DistanceLookUpTable struct {
	// contains filtered or unexported fields
}

func NewDistanceLookUpTable 

func NewDistanceLookUpTable(segments int, centroids int, center []float32) *DistanceLookUpTable

func (*DistanceLookUpTable) LookUp 

func (lut *DistanceLookUpTable) LookUp(
	encoded []byte,
	pq *ProductQuantizer,
) float32

func (*DistanceLookUpTable) Reset added in v1.19.6 

func (lut *DistanceLookUpTable) Reset(segments int, centroids int, center []float32)

type Encoder 

type Encoder byte
const (
	UseTileEncoder   Encoder = 0
	UseKMeansEncoder Encoder = 1
)

type EncoderDistribution 

type EncoderDistribution byte
const (
	NormalEncoderDistribution    EncoderDistribution = 0
	LogNormalEncoderDistribution EncoderDistribution = 1
)

type FilterFunc 

type FilterFunc func([]float32) []float32

type KMeans 

type KMeans struct {
	K                  int     // How many centroids
	DeltaThreshold     float32 // Used to stop fitting if there are not too much changes in the centroids anymore
	IterationThreshold int     // Used to stop fitting after a certain amount of iterations
	Distance           distancer.Provider
	// contains filtered or unexported fields
}

func NewKMeans 

func NewKMeans(k int, dimensions int, segment int) *KMeans

func NewKMeansWithCenters 

func NewKMeansWithCenters(k int, dimensions int, segment int, centers [][]float32) *KMeans

func (*KMeans) Add 

func (m *KMeans) Add(x []float32)

func (*KMeans) Center 

func (m *KMeans) Center(point []float32) []float32

func (*KMeans) Centers 

func (m *KMeans) Centers() [][]float32

func (*KMeans) Centroid 

func (m *KMeans) Centroid(i byte) []float32

func (*KMeans) Encode 

func (m *KMeans) Encode(point []float32) byte

func (*KMeans) ExposeDataForRestore 

func (m *KMeans) ExposeDataForRestore() []byte

func (*KMeans) Fit 

func (m *KMeans) Fit(data [][]float32) error

func (*KMeans) NNearest 

func (m *KMeans) NNearest(point []float32, n int) []uint64

func (*KMeans) Nearest 

func (m *KMeans) Nearest(point []float32) uint64

func (*KMeans) String added in v1.19.6 

func (k *KMeans) String() string

String prints some minimal information about the encoder. This can be used for viability checks to see if the encoder was initialized correctly – for example after a restart.

type KMeansPartitionData 

type KMeansPartitionData struct {
	// contains filtered or unexported fields
}

type PQData 

type PQData struct {
	Ks                  uint16
	M                   uint16
	Dimensions          uint16
	EncoderType         Encoder
	EncoderDistribution byte
	Encoders            []PQEncoder
	UseBitsEncoding     bool
	TrainingLimit       int
}

type PQDistancer 

type PQDistancer struct {
	// contains filtered or unexported fields
}

func (*PQDistancer) Distance 

func (d *PQDistancer) Distance(x []byte) (float32, bool, error)

func (*PQDistancer) DistanceToFloat added in v1.19.7 

func (d *PQDistancer) DistanceToFloat(x []float32) (float32, bool, error)

type PQEncoder 

type PQEncoder interface {
	Encode(x []float32) byte
	Centroid(b byte) []float32
	Add(x []float32)
	Fit(data [][]float32) error
	ExposeDataForRestore() []byte
}

type ProductQuantizer 

type ProductQuantizer struct {
	// contains filtered or unexported fields
}

func NewProductQuantizer 

func NewProductQuantizer(cfg ent.PQConfig, distance distancer.Provider, dimensions int) (*ProductQuantizer, error)

func NewProductQuantizerWithEncoders 

func NewProductQuantizerWithEncoders(cfg ent.PQConfig, distance distancer.Provider, dimensions int, encoders []PQEncoder) (*ProductQuantizer, error)

func (*ProductQuantizer) CenterAt 

func (pq *ProductQuantizer) CenterAt(vec []float32) *DistanceLookUpTable

func (*ProductQuantizer) Decode 

func (pq *ProductQuantizer) Decode(code []byte) []float32

func (*ProductQuantizer) Distance 

func (pq *ProductQuantizer) Distance(encoded []byte, lut *DistanceLookUpTable) float32

func (*ProductQuantizer) DistanceBetweenCompressedAndUncompressedVectors 

func (pq *ProductQuantizer) DistanceBetweenCompressedAndUncompressedVectors(x []float32, encoded []byte) float32

func (*ProductQuantizer) DistanceBetweenCompressedVectors 

func (pq *ProductQuantizer) DistanceBetweenCompressedVectors(x, y []byte) float32

func (*ProductQuantizer) Encode 

func (pq *ProductQuantizer) Encode(vec []float32) []byte

func (*ProductQuantizer) ExposeFields 

func (pq *ProductQuantizer) ExposeFields() PQData

func (*ProductQuantizer) Fit 

func (pq *ProductQuantizer) Fit(data [][]float32)

func (*ProductQuantizer) NewDistancer 

func (pq *ProductQuantizer) NewDistancer(a []float32) *PQDistancer

func (*ProductQuantizer) ReturnDistancer added in v1.19.6 

func (pq *ProductQuantizer) ReturnDistancer(d *PQDistancer)

type TileEncoder 

type TileEncoder struct {
	// contains filtered or unexported fields
}

func NewTileEncoder 

func NewTileEncoder(bits int, segment int, encoderDistribution EncoderDistribution) *TileEncoder

func RestoreTileEncoder 

func RestoreTileEncoder(bins float64, mean float64, stdDev float64, size float64, s1 float64, s2 float64, segment uint16, encoderDistribution byte) *TileEncoder

func (*TileEncoder) Add 

func (te *TileEncoder) Add(x []float32)

func (*TileEncoder) Centroid 

func (te *TileEncoder) Centroid(b byte) []float32

func (*TileEncoder) Encode 

func (te *TileEncoder) Encode(x []float32) byte

func (*TileEncoder) ExposeDataForRestore 

func (te *TileEncoder) ExposeDataForRestore() []byte

func (*TileEncoder) Fit 

func (te *TileEncoder) Fit(data [][]float32) error

Source Files

View all Source files

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