NewHNSWIndex()

This function creates an HNSW (Hierarchical Navigable Small World) index configuration for high-recall vector search.

func NewHNSWIndex(metricType MetricType, m int, efConstruction int) Index

PARAMETERS:

• metricType (MetricType)

  The distance metric type for similarity search (e.g., index.COSINE, index.L2, index.IP).

• m (int)

  The number of bi-directional links for each element. Higher values improve recall but increase memory usage. Typical range: 4-64.

• efConstruction (int)

  The size of the dynamic candidate list during index construction. Higher values improve index quality but slow down build time. Typical range: 8-512.

RETURNS:

Index

An index configuration instance. Pass this to CreateIndex() via the index option.

Example

import (
    "github.com/milvus-io/milvus/client/v2/index"
    "github.com/milvus-io/milvus/client/v2/milvusclient"
)

// Create index configuration
idx := index.NewHNSWIndex(index.COSINE, 16, 200)

// Use with CreateIndex
createIdxOption := milvusclient.NewCreateIndexOption("collection_name", "vector_field", idx)
task, err := client.CreateIndex(ctx, createIdxOption)