And of course, I should have made mention of the docs here:
http://www.postgresql.org/docs/8.1/interactive/migration.html
because it likely explains it better than I am. :-)
On Wed, 17 Jan 2007, Jeff Frost wrote:
> You have to dump the original 7.4.9 version of the database and restore that
> into the 8.1.3 database server.
>
> An example:
>
> I have a server db1 which is running pg 7.4.9
> I have a server db2 which is to replace db1 running pg 8.1.3
>
> I would likely just do something like this from db2 (assuming no clients are
> writing to db1 while this is happening):
>
> pg_dumpall -h db1 | psql -h db2
>
>
> On Wed, 17 Jan 2007, Andrew Edson wrote:
>
>> Please clear something up for me. The database I'm trying to upgrade
>> was/is empty; only the original installation was present, no tables.
>> Exactly what is it I'm supposed to be dumping? If you mean making a copy
>> of the original 8.1.3, that I've done before, but I'm unclear as to the
>> meaning of what you're saying at the moment. Please enlighten me.
>>
>> Jeff Frost <jeff@frostconsultingllc.com> wrote: Andrew,
>>
>> If you're moving between major versions, a dump/restore is necessary. The
>> proper procedure is:
>>
>> 1) pg_dump the old database by using the new version of pg_dump (8.1.x)
>> against the old db server (7.4.9 in your case)
>> 2) stop the old database server (and possibly move/rename the old data dir)
>> 3) initdb the new database server
>> 4) edit postgresql.conf, etc
>> 5) start the new database server
>> 6) pg_restore the old database into the newly initialized data directory
>>
>> So, it sounds like you'll need to reinstall 7.4 and bring it back up, then
>> use
>> the 8.1.3 pg_dump to create a dump, then restore that into the new 8.1
>> server.
>>
>>
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>
>
--
Jeff Frost, Owner <jeff@frostconsultingllc.com>
Frost Consulting, LLC http://www.frostconsultingllc.com/
Phone: 650-780-7908 FAX: 650-649-1954