Re: Postgresql 9.4 pg_upgrade issues

On Tue, Nov 24, 2015 at 09:45:16PM +0000, Yogi Barot wrote:
> Thanks a lot for quick reply.
>
> In this case, If I move table space out of old data directory using symlink, then can I remove old data directory?

Yes. The warning is there so you don't delete the old cluster's data
directory while it contains tablespaces for the new cluster. As you can
imagine, that would be a bad thing.

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>
>
>
> -----Original Message-----
> From: Bruce Momjian [mailto:bruce(at)momjian(dot)us]
> Sent: Tuesday, November 24, 2015 4:41 PM
> To: Yogi Barot
> Cc: 'Albe Laurenz'; 'pgsql-admin(at)postgresql(dot)org'
> Subject: Re: [ADMIN] Postgresql 9.4 pg_upgrade issues
>
> On Tue, Nov 24, 2015 at 08:32:18PM +0000, Yogi Barot wrote:
> > Hi,
> >
> > I was able to manage upgrade testing with cluster which does not have plsh for now.
> >
> > But I have another problem. All my data TB is in the tablespace in PGData directory, I did the upgrade using link method, now I got this warning.
> >
> > Upgrade Complete
> > ----------------
> > Optimizer statistics are not transferred by pg_upgrade so, once you
> > start the new server, consider running:
> > analyze_new_cluster.sh
> >
> > Could not create a script to delete the old cluster's data files
> > because user-defined tablespaces exist in the old cluster directory.
> > The old cluster's contents must be deleted manually.
> >
> > 1) Does This means , I can't delete old cluster data directory? Or I can delete it manually?
>
> If you delete the old data directory, you will delete the old _and_ _new_ cluster tablespaces.
>
> > 2) Deleting old data directory will effect any functionality of postgresql new cluster?
>
> Yep, you can bet on that. :-)
>
> > 3) Also Need some clarification on link mode, what if I upgrade from 9.5. to future release using pg_upgarde link mode will still work on same data directory?
>
> Yes, but I suggest you shut down your server and move those tablespaces out of the data directory, update the pg_tblspc symlinks, and then restart the server.
>
> --
> Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
> EnterpriseDB http://enterprisedb.com
>
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