The advice I've received upon asking this question in the past is
clients first then server. We are currently running many 9.1 clients
against some servers awaiting upgrade
- the most ancient of which is
7.4. The only problem (annoyance, really) is that in interactive
psql
I'm running a postgresql 8.1 database on a single server which is queried from
a number of client systems.
Both server and clients are running Debian Linux.
I need to upgrade from 8.1 to 8.3, but it's difficult for me to upgrade
everything at once. Is it possible to
run different versions of