For the uneducated, how large is too large? Curious.

FAISS runs in RAM. If your dataset can't fit into ram, FAISS is not the right tool.

Shoud it be:

If the total size of your data isn't loo large...?

Data being a plural gets me.

You might have small datums but a lot of kilobytes!

Data is technically a plural but nobody uses the singular and it’s being used as a singular term often - which is completely fine I think, nobody speaks Latin anyway

The opposite of Data is Lore.