uchenily commented on code in PR #58130:
URL: https://github.com/apache/doris/pull/58130#discussion_r2563833101
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be/src/olap/rowset/segment_v2/ann_index/faiss_ann_index.cpp:
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@@ -340,6 +346,62 @@ void FaissVectorIndex::build(const FaissBuildParameter&
params) {
hnsw_index->hnsw.efConstruction = params.ef_construction;
_index = std::move(hnsw_index);
+ } else if (params.index_type == FaissBuildParameter::IndexType::IVF) {
+ set_type(AnnIndexType::IVF);
+ std::unique_ptr<faiss::Index> ivf_index;
+ if (params.metric_type == FaissBuildParameter::MetricType::L2) {
+ _quantizer = std::make_unique<faiss::IndexFlat>(params.dim,
faiss::METRIC_L2);
Review Comment:
quantizer is a independent index used to assign vectors to clusters, here we
use IndexFlat because flat index is accurate.
(_quantizer is only used in IVF)
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