Support SVSVamana as IVF coarse quantizer via index_factory#5175
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Support SVSVamana as IVF coarse quantizer via index_factory#5175mnorris11 wants to merge 1 commit intofacebookresearch:mainfrom
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…research#5175) Summary: Enable IndexSVSVamana to be used as a coarse quantizer for Faiss IVF indexes, following the same pattern as IndexHNSWFlat and IndexNSGFlat. Changes: 1. index_factory.cpp: Add `IVF<nlist>_SVSVamana<degree>` regex pattern in `parse_coarse_quantizer()` and explicit `get_trains_alone()` return for IndexSVSVamana (training mode 2: k-means on flat index, then centroids added to the graph). Both guarded by `#ifdef FAISS_ENABLE_SVS`. 2. IndexSVSVamana.h/.cpp: Add `reconstruct()` support with a `stored_vectors` buffer. The SVS runtime API does not expose vector retrieval, so we keep a copy of added vectors. This is needed for IVF residual computation (`by_residual = true`) and `check_compatible_for_merge()`. When used as a coarse quantizer, the buffer holds only `nlist` centroids (trivial memory cost). Also clears `stored_vectors` on `reset()`. Example factory string: `"IVF65536_SVSVamana32,SQ8"` Differential Revision: D103568560
Summary: Enable IndexSVSVamana to be used as a coarse quantizer for Faiss IVF indexes, following the same pattern as IndexHNSWFlat and IndexNSGFlat. Changes: 1. index_factory.cpp: Add `IVF<nlist>_SVSVamana<degree>` regex pattern in `parse_coarse_quantizer()` and explicit `get_trains_alone()` return for IndexSVSVamana (training mode 2: k-means on flat index, then centroids added to the graph). Both guarded by `#ifdef FAISS_ENABLE_SVS`. 2. IndexSVSVamana.h/.cpp: Add `reconstruct()` support with a `stored_vectors` buffer. The SVS runtime API does not expose vector retrieval, so we keep a copy of added vectors. This is needed for IVF residual computation (`by_residual = true`) and `check_compatible_for_merge()`. When used as a coarse quantizer, the buffer holds only `nlist` centroids (trivial memory cost). Also clears `stored_vectors` on `reset()`. Example factory string: `"IVF65536_SVSVamana32,SQ8"` Differential Revision: D103568560
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Summary:
Enable IndexSVSVamana to be used as a coarse quantizer for Faiss IVF indexes, following the same pattern as IndexHNSWFlat and IndexNSGFlat.
Changes:
index_factory.cpp: Add
IVF<nlist>_SVSVamana<degree>regex pattern inparse_coarse_quantizer()and explicitget_trains_alone()return for IndexSVSVamana (training mode 2: k-means on flat index, then centroids added to the graph). Both guarded by#ifdef FAISS_ENABLE_SVS.IndexSVSVamana.h/.cpp: Add
reconstruct()support with astored_vectorsbuffer. The SVS runtime API does not expose vector retrieval, so we keep a copy of added vectors. This is needed for IVF residual computation (by_residual = true) andcheck_compatible_for_merge(). When used as a coarse quantizer, the buffer holds onlynlistcentroids (trivial memory cost). Also clearsstored_vectorsonreset().Example factory string:
"IVF65536_SVSVamana32,SQ8"Differential Revision: D103568560