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milvus-io / knowhere

Knowhere is an open-source vector search engine, integrating FAISS, HNSW, etc.
Apache License 2.0
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search recall of gpu_ivf_sq on glove is lower than ivf_sq #335

Open yanliang567 opened 2 years ago

yanliang567 commented 2 years ago

especially when nprobe is samll

nlist=1024
ivf_sq8 search on glove recalls: [0.2931, 0.4116, 0.5251, 0.624, 0.7116, 0.7899, 0.8578, 0.9146, 0.9576, 0.9807]
gpu_ivf_sq8 search on glove recalls: [0.2586, 0.3725, 0.4863, 0.5918, 0.685, 0.7688, 0.8406, 0.9026, 0.9512, 0.9788]
yanliang567 commented 2 years ago

on sift dataset, the recall is almost same between gpu_ivf_sq8 and ivf_sq8