On 2015-01-23 14:27:51 -0500, Stephen Frost wrote:
> * Andres Freund (andres@2ndquadrant.com) wrote:
> > On 2015-01-23 14:05:10 -0500, Stephen Frost wrote:
> > > If I follow what you're suggesting, pg_upgrade would
> > > need a new 'in-place' mode that removes all of the catalog tables from
> > > the old cluster and puts the new catalog tables into place and leaves
> > > everything else alone.
> >
> > No. Except that it'd preserve the relfilenodes (i.e. the filenames of
> > relations) it'd work exactly the same as today. The standby is simply
> > updated by rsyncing the new data directory of the primary to the
> > standby.
>
> You'd have to replace the existing data directory on the master to do
> that, which pg_upgrade was designed specifically to not do, in case
> things went poorly.
Why? Just rsync the new data directory onto the old directory on the
standbys. That's fine and simple.
> You'd still have to deal with the tablespace directories being renamed
> also, since we include the major version and catalog build in the
> directory name..
True.
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services