Thread: upgrade PostgreSQL 8.x on production FreeBSD

Could anybody point to an on-line resource about the steps involved with
upgrading of PostgreSQL 8.x on a production FreeBSD 5.4 with minimum
downtime (i.e. 1 - stop db so that no changes happen 2 - dump 3 -
upgrade (ports) 4 - import 5- start db).

Thanks,
Iv Ray

On Feb 23, 2006, at 9:21 AM, pobox@verysmall.org wrote:

> Could anybody point to an on-line resource about the steps involved
> with upgrading of PostgreSQL 8.x on a production FreeBSD 5.4 with
> minimum downtime (i.e. 1 - stop db so that no changes happen 2 -
> dump 3 - upgrade (ports) 4 - import 5- start db).

Upgrade from what to what?

If you're upgrading from 8.0.x to 8.0.y then there is no dump/reload.

If youre going from < 8.1 to 8.1 then there is dump/reload OR you can
use some sort of replication such as slony to copy the data, then
have a few seconds of downtime while you turn off the older DB and
put the 8.1 in its place.

pobox@verysmall.org wrote:
> Could anybody point to an on-line resource about the steps involved with
> upgrading of PostgreSQL 8.x on a production FreeBSD 5.4 with minimum
> downtime (i.e. 1 - stop db so that no changes happen 2 - dump 3 -
> upgrade (ports) 4 - import 5- start db).

You want to make your dump with the pg_dump of the new version. I'm not
sure you can build the tools seperately (that'd be excellent, but my
FreeBSD boxes are at home)...

I think it should be:
1 - make postgresql,
2 - make install postgresql-tools
3 - dump
4 - stop db
5 - make install postgresql
6 - restore
7 - start db

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Alban Hertroys
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pobox@verysmall.org napisał(a):
> Could anybody point to an on-line resource about the steps involved with
> upgrading of PostgreSQL 8.x on a production FreeBSD 5.4 with minimum
> downtime (i.e. 1 - stop db so that no changes happen 2 - dump 3 -
> upgrade (ports) 4 - import 5- start db).
>

here you are:
http://www.postgresql.org/docs/8.1/static/migration.html

If both PostgreSQL versions can't coexist on one host, you can use
another one, with possibly identical setup (HW/OS/etc) for the
migration, and transfer (use tar + netcat for minimal downtime) the
cluster afterwards.

Hi,

If the downtime is a concern, you could use Slony-1 for the migration.

Philippe Ferreira.

>pobox@verysmall.org napisał(a):
>
>
>>Could anybody point to an on-line resource about the steps involved with
>>upgrading of PostgreSQL 8.x on a production FreeBSD 5.4 with minimum
>>downtime (i.e. 1 - stop db so that no changes happen 2 - dump 3 -
>>upgrade (ports) 4 - import 5- start db).
>>
>>
>>
>
>here you are:
>http://www.postgresql.org/docs/8.1/static/migration.html
>
>If both PostgreSQL versions can't coexist on one host, you can use
>another one, with possibly identical setup (HW/OS/etc) for the
>migration, and transfer (use tar + netcat for minimal downtime) the
>cluster afterwards.
>
>
>

Thank you all for the valuable advices.

I'll try them on a test server and will come back.

Thanks again!
Iv