They have [0] [1], yes, but they also mention [2] learning that skipping building indices during a DB copy (doing so instead after the new instance is built) is much faster, which is pretty basic RDBMS knowledge. It’s great to be learning, and even better to be sharing that knowledge, but it gives me pause about accepting much of what they’ve written as expertise.

IME, many SaaS companies have eschewed the idea of having any DB experts, and this inevitably leads to pain down the road.

[0]: https://www.notion.so/blog/data-model-behind-notion

[1]: https://www.notion.so/blog/sharding-postgres-at-notion

[2]: https://www.notion.so/blog/the-great-re-shard