Bill wrote:
> Is is possible to have two different versions of PostgreSQL running on
> the same computer at the same time?
>
It's easy to have two *instances* of postgresql running - they just need
to have their own data directories and be configured to not conflict
with each other (ie. listen on different ports).
Having two purely separate versions should be doable but more tricky as
you will have to build them in such a way each will see its own version
of certain libraries. Perhaps using static linking would deal with this
issue - I'll let someone else chime in on that. You will still, of
course, need to use different ports and data directories.
You could, if you prefer, set up multiple virtual servers on the same
computer and run each copy of PG on its own virtual server.
Cheers,
Steve