On Wed, Jun 19, 2024 at 08:37:17AM -0500, Nathan Bossart wrote:
> My understanding is that you basically have to restart the upgrade from
> scratch if that happens. I suppose there could be a problem if you try to
> use the half-upgraded cluster after a crash, but I imagine you have a good
> chance of encountering other problems if you do that, too. So I don't
> think we care...
It's never been assumed that it would be safe to redo a
pg_upgradeafter a crash on a cluster initdb'd for the upgrade, so I
don't think we need to care about that, as well.
One failure I suspect would quickly be faced is OIDs getting reused
again as these are currently kept consistent.
--
Michael