Choosing to not use something is not a good way to learn how to use it.
In this particular instance, the lesson is to either a) use the provided database tools (e.g. pg_dumpall
) for live backup, or b) bring the database cluster down before you backup the raw data folder.
I don’t know where this particular fella fits in the history, but turtles evolved from similar quadruped reptiles. Basically, their ribs evolved flat and wide so that their chests could support them better while burrowing tunnels. That turned into the turtle plastron.