Summary:
Pull Request resolved: https://github.com/facebookresearch/faiss/pull/3987
Created a new notebook demonstrating how to separate serializing and deserializing the PQ codebook (via faiss.write_index for IndexPQ) independently of the vector codes. For example, in the case where you have a few vector embeddings per user and want to shard the flat index by user you can re-use the same PQ method for all users but store each user's codes independently.
Reviewed By: junjieqi
Differential Revision: D64844978
fbshipit-source-id: ad6434101fbb3ef84999527a577ecb9b503e556c
