add FAISS to env

[ykumards]

Having a vector database would be useful for the competition. FAISS is a fairly popular option and has permissible license.

[chrisjkuch]

Hey @ykumards- Thanks for the proposed change! Makes sense to add faiss.

We had an issue with the GH build workflow that I believe we've fixed upstream. Can you rebase and re-submit?

In addition, we've occasionally had issues with certain faiss releases in the past - can you add it to the list of packages in runtime/tests/test_packages.py, and also add a quick test that it works as expected in the GPU environment?

Something like:

@pytest.mark.skipif(not GPU_AVAILABLE, reason="No GPU available")
def test_faiss_n_gpus():
    import faiss
    assert faiss.get_num_gpus() > 0

should hopefully suffice (this exact snippet is untested).

Thanks!

[ykumards]

Hi @chrisjkuch, I added the tests. Let me know if it looks good, thanks!

[chrisjkuch]

Looks good, thank you!