Re: optimize file transfer in pg_upgrade

Hi,

On 2025-03-19 12:28:33 -0400, Tom Lane wrote:
> Nathan Bossart <nathandbossart@gmail.com> writes:
> > I'm currently planning to commit this sometime early-ish next week.  One
> > notable loose end is the lack of a pg_upgrade test with a non-default
> > tablespace, but that is an existing problem that IMHO is best handled
> > separately (since we can only test it in cross-version upgrades).
>
> Agreed that that shouldn't block this, but we need some kind of
> plan for testing it better.

Yea, this is really suboptimal.

Shouldn't allow_in_place_tablespaces be sufficient to deal with that scenario?
Or at least it should make it reasonably easy to cope if it doesn't already
suffice?

Greetings,

Andres Freund