Hi Matthias,
> On 02. May, 2020, at 20:58, Matthias Apitz <guru@unixarea.de> wrote:
> OK, lesson learned: Next time I will do a tar backup of PGDATA after
> the configuration of the cluster and before creating any database in it.
that tar would still contain too much. :-) You really only need the config files. All else is created by initdb.
Cheers,
Paul