Sizing calculator? Postgres storage size for 1M files ?

[netrc]

Anyone able to provide some simple calculations to size a Postgres cluster for 1 million files, say 100,000 directories?

Actual compute cycles won't be too high - normally low create/delete operations; just occasional/short bursts of high activity.

What else is needed for back-of-envelope calculation?

[davies]

It's roughly 500 bytes per file/directory, so 500MB per 1 million files.