Which method of constructing the index

[xiaotingyun]

https://www.dropbox.com/s/dytqaqngaupp884/contriever_msmarco_index.tar.gz
How was the index of this link established, Flat or other methods

[MXueguang]

Hi, sorry for the late reply. It is flatIP index

[xiaotingyun]

But when I use flatIP, on the dl19 dataset, the map of contriever is 26.6, ndcg@10 is 45.5, and recall@1k is 77.5. The map of contriever-msmarco is 45.2, ndcg@10 is 67.5, recall@1k is 84.3. Can you give a sample code for building the index?