Re: upgrade postgres 8.1.21 to version 8.3.6

Ciao Silvio,

On Tue, 13 Jul 2010 22:52:51 +0200, Iñigo Martinez Lasala
> You should script database migration process in order to make it faster.
> Upgrading binaries is really simple. A yum upgrade should be enough.

Yes, faster and repeatable. Something you can launch with a script that
does everything from scratch. As Iñigo was pointing out, you must pay a lot
of attention in setting up a test environment which helps you:

* simulate the migration process (and gives you accurate measures of
times)
* test the applications

As Iñigo said, on a typical usage pattern, the most likely set of errors
you will encounter are data type checks which require casting. Therefore it
becomes crucial to:

* setup the test database (preferably on a different server)
* setup test applications that interface with the new Postgres database

I assume you are using 8.3 because of RPM availability, isn't it?
Otherwise, you should think of 8.4.

Ciao,
Gabriele

--
Gabriele Bartolini - 2ndQuadrant Italia
PostgreSQL Training, Services and Support
Gabriele(dot)Bartolini(at)2ndQuadrant(dot)it - www.2ndQuadrant.it