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the faiss index method change: replace the IndexFlatIP with IndexIVFFlat #250

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the faiss index method change: replace the IndexFlatIP with IndexIVFFlat #250

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Adeshen
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@Adeshen Adeshen commented Apr 19, 2024

IndexFlatIP is brute searching method.
IndexIVFFlat use aggregation to lower the dimension. So it will be faster, but lower the precision.

@Adeshen
the faiss index method change: replace the IndexFlatIP with IndexIVFF…
a6fc420 
…lat.

IndexFlatIP is brute searching method
IndexIVFFlat use  aggregation to lower the dimension. So it will be faster, but lower the precision.
@tpoisonooo
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IndexIVFFlat needs clustering and L2 norm as distance method, see https://zhuanlan.zhihu.com/p/40236865

IndexIVFFlat may cause precision drop.

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See also https://github.com/facebookresearch/faiss/wiki/Faiss-indexes

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@Adeshen @tpoisonooo