A KV store is both good enough and highly performant. I use Redis for storing embeddings and expire them after a while. Unless you have a highly specialized use

A KV store is both good enough and highly performant. I use Redis for storing embeddings and expire them after a while. Unless you have a highly specialized use case it’s not economical to persistently store chunk embedding. Redis also does have vector search capability as well. However, the most popular answer you’ll get here is to use Postgres (pgvectpr).