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Faiss

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About

Faiss is a library for efficient similarity search and clustering of dense vectors. It contains algorithms that search in sets of vectors of any size, up to ones that possibly do not fit in RAM. It also contains supporting code for evaluation and parameter tuning. Faiss is written in C++ with complete wrappers for Python. Some of the most useful algorithms are implemented on the GPU. It is developed primarily at FAIR, the fundamental AI research team of Meta. Faiss builds a data structure (index) in RAM from a set of vectors. When given a new vector, it efficiently finds the nearest neighbors. It can trade precision for speed, perform maximum inner product search, return elements within a given radius, store the index on disk, index binary vectors, and ignore a subset of index vectors according to a predicate on the vector ids.

Platform
Web
Keywords
indexingsimilarity searchclusteringdense vectorsinverted file
Task
vector search

Features

clustering of dense vectors

efficient similarity search

k-nearest neighbor search

range search

maximum inner product search

gpu implementation of algorithms

evaluation and parameter tuning

algorithms for searching in large vector sets

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