Throwing a few more on here (mix of beginner and advanced):
- Wikipedia article: https://en.wikipedia.org/wiki/Vector_database
- Vector Database 101: https://zilliz.com/learn/introduction-to-unstructured-data
- ANN & Similarity search: https://vinija.ai/concepts/ann-similarity-search/
- Distributed database: https://15445.courses.cs.cmu.edu/fall2021/notes/21-distribut...