On 12/2/21 08:05, Alan Stange wrote:
> Hello all,
>
> We're running a 13.x installation and looking to upgrade to 14.1. This
> is all on Linux servers. We have a main instance running with a number
> of hot standby replicas configured. In the past, we have done a
> dump/restore on a slow evening and then rsynced all the bits around so
> that the main server and all replicas were identical at the start. The
> database has gotten larger now (~1TB) so that is a less desirable option.
>
> So I am thinking to do a pg_upgrade --link on each of the main and the
> hot standby replicas, and then restarting all the processes. I'm sure
> this will work fine on the main server, but I have not seen any mention
> of this working in the expected way on the hot standby replicas. Can
> someone confirm that the steps I described here will work in the way I
> am optimistically expecting it will?
Have you looked at steps 9 & 11 here?:
https://www.postgresql.org/docs/current/pgupgrade.html
>
> I should mention that we are running on ZFS, and will take a snapshot
> prior to the upgrade, so that if something goes sideways with our use of
> --link we can revert back instantly.
>
> Thank you,
>
> Alan
>
>
--
Adrian Klaver
adrian.klaver@aklaver.com