Re: optimize file transfer in pg_upgrade

Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I'm not quite sure what the best thing is to do is for the pg_upgrade
> tests in particular, and it may well be best to do as you propose for
> now and figure that out later. But I question whether just rerunning
> all of those tests with several different mode flags is the right
> thing to do. Why for example does 005_char_signedness.pl need to be
> checked under both --link and --clone? I would guess that there are
> one or maybe two tests in src/bin/pg_upgrade/t that needs to test
> --link and --clone and they should grow internal loops to do that
> (when supported by the local platform) and PG_UPGRADE_TEST_MODE should
> go in the garbage.

+1

I'd be particularly allergic to running 002_pg_upgrade.pl multiple
times, as that's one of our most expensive tests, and I flat out
don't believe that expending that many cycles could be justified.
Surely we can test these modes sufficiently in some much cheaper and
more targeted way.

regards, tom lane