If you use xfs (+`file_copy_method=CLONE`) you can do this with Postgres 18.

`CREATE DATABASE clankerdb TEMPLATE sourcedb STRATEGY=FILE_COPY;`.

But Ardent can be useful for many, because cloud providers uses heavily restricted Postgres. And many use Aurora, which doesn't event let configure the `log_line_prefix`.

Though if cloud providers add file_copy_method=CLONE compatible managed pg ...

ref: https://boringsql.com/posts/instant-database-clones/

I wanted to try doing something similar to this in our dev environment (think shared dev database but per branch clones), but this limitation seemed tricky to accept:

> The source database can't have any active connections during cloning.

I wouldn't mind some lock contention, but having to kill all connections seemed a bit harsh