Hard upgrade (everything) - Mailing list pgsql-general

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Hi list,

I've asked this question already on the PostGIS list, but I think it
might get great answers here too. I'm running two database cluster
with PostGIS 1.5 and PostgreSQL 9.1 on FreeBSD 9.2-RELEASE-p3 and
apparently my PostGIS and PostgreSQL are a little bit outdated.
Now the plan is to upgrade both PostGIS to 2.1 and PostgreSQL to 9.3,
 which are the latest versions in the ports.

Now, I am a little bit lost with all the precautions and measures one
has to undertake to do the hard upgrade. From what I read on the
PostgreSQL site, I can choose whether I want to use pg_upgrade
(without the need of a intermediate dump) or pg_dumpall to put the
data aside. I presume I can't use pg_upgrade since this wouldn't take
PostGIS into account, right?

That leaves me with pg_dumpall for the PostgreSQL upgrade. Now,
reading the PostGIS instructions to upgrade I come to the conclusion
that a binary dump is required to put the data aside while doing the
upgrade. Thing is pg_dump only dumps one spatial database, and I have
several in my clusters, so I'd need to dump all of them, right?

And here's where my confusion starts, since there are different tools
used for PostgreSQL and PostGIS for the individual upgrade. What would
be the correct procedure to dump a complete cluster in a PostGIS and
PostgreSQL compliant way? My ideas so far:

Step one: Use pg_dumpall to dump the roles and cluster metadata
Step two: Iterate and use pg_dump in binary mode to dump every
database in the cluster
Step three: rename/empty the target drive/folder
Step four: do the upgrade of PostgreSQL and PostGIS
Step five: restore the roles and metadata
Step six: use the command utils/postgis_restore.pl to restore each
individual database

Does that look sound?

On a side note, I tried upgrading each part individually, but the port
dependencies won't let me do that because upgrading PostgreSQL to 9.3
will also pull PostGIS 2.1 and upgrading PostGIS 2.1 will also pull
PostgreSQL 9.3, so I only get the two of them ...


Any tips on the procedure are greatly welcome :-)

Frank

- --
Frank BRONIEWSKI

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