landing_page/qdrant-landing/content/documentation/headless/snippets/update-collection/hnsw-and-quantization/rust.rs

use std::collections::HashMap;

use qdrant_client::qdrant::{
    quantization_config_diff::Quantization, vectors_config_diff::Config, HnswConfigDiffBuilder,
    QuantizationType, ScalarQuantizationBuilder, UpdateCollectionBuilder, VectorParamsDiffBuilder,
    VectorParamsDiffMap,
};

pub async fn main() -> anyhow::Result<()> {
    let client = qdrant_client::Qdrant::from_url("http://localhost:6334").build()?; // @hide

    client
        .update_collection(
            UpdateCollectionBuilder::new("{collection_name}")
                .hnsw_config(HnswConfigDiffBuilder::default().ef_construct(123))
                .vectors_config(Config::ParamsMap(VectorParamsDiffMap {
                    map: HashMap::from([(
                        ("my_vector".into()),
                        VectorParamsDiffBuilder::default()
                            .hnsw_config(HnswConfigDiffBuilder::default().m(32).ef_construct(123))
                            .build(),
                    )]),
                }))
                .quantization_config(Quantization::Scalar(
                    ScalarQuantizationBuilder::default()
                        .r#type(QuantizationType::Int8.into())
                        .quantile(0.8)
                        .always_ram(true)
                        .build(),
                )),
        )
        .await?;

    Ok(())
}