Re: pg_upgrade & tablespaces - Mailing list pgsql-general

From Bruce Momjian
Subject Re: pg_upgrade & tablespaces
Date
Msg-id 20140111161841.GA29654@momjian.us
Whole thread Raw
In response to Re: pg_upgrade & tablespaces  (Adrian Klaver <adrian.klaver@gmail.com>)
Responses Re: pg_upgrade & tablespaces  (Adrian Klaver <adrian.klaver@gmail.com>)
Re: pg_upgrade & tablespaces  (Joseph Kregloh <jkregloh@sproutloud.com>)
List pgsql-general
On Sat, Jan 11, 2014 at 06:43:16AM -0800, Adrian Klaver wrote:
> >>Well the issue seems to be with 9.0. I am not exactly sure where
> >>pg_upgrade is pulling its information, but I am guessing from the
> >>error message that on the 9.0 side of things it is using
> >>spclocation. In the OPs situation that is no longer valid for 9.0
> >>once its data directory is moved. The special circumstance here
> >>being that the user tablespace is in PGDATA. I would welcome
> >>enlightenment on this.
> >
> >The problem is that pre-9.2 recorded the tablespace location in
> >pg_tablespace and in the symlink.  When the pg_upgrade instructions tell
> >you to rename the old database cluster, it doesn't remind pre-9.2 users
> >to update in-PGDATA tablespaces.
>
> Just so I understand, this is update spclocation in pg_upgrade in
> the pre-9.2 database.

Right.  I know there were multiple issue with this upgrade, jails
probably being the biggest, but a new one I had never heard is that _if_
you are placing your tablespaces in the PGDATA directory, and you are
upgrading from pre-9.2, if you rename the old data directory, you also
need to start the old server and update pg_tablespace.spclocation.

No one has ever reported that failure, but it would certainly happen.  I
wonder if pg_upgrade should be modified to check that
pg_tablespace.spclocation point to real directories for pre-9.2 servers.

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + Everyone has their own god. +


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