Re: [PERFORM] Installation Steps to migrate to Postgres 8.3.1

Hi,
Along these lines, the usual upgrade path is a pg_dump/pg_restore set.
However, what if your database is large (> 50GB), and you have to
minimize your downtime (say less than an hour or two). Any suggestions
on how to handle that kind of situation? It sure would be nice to have
some kind of tool to update in-place a database, though I know that's
not a likely path.

Doug

-----Original Message-----
From: pgsql-performance-owner@postgresql.org
[mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Scott
Marlowe
Sent: Tuesday, May 13, 2008 4:26 AM
To: Gauri Kanekar
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Installation Steps to migrate to Postgres 8.3.1

On Mon, May 12, 2008 at 11:40 PM, Gauri Kanekar
<meetgaurikanekar@gmail.com> wrote:
> Hi,
>
> We want to migrate from postgres 8.1.3 to postgres 8.3.1.
> Can anybody list out the installation steps to be followed for
migration.
> Do we require to take care of something specially.

First, I'd recommend updating your 8.1.x install to 8.1.11 or whatever
the latest is right now.

There are some ugly bugs hiding in 8.1.3 if I remember correctly (Tom
just mentioned one that could do things like leaving orphaned objects
in the db in another thread.) It's always a good idea to keep up to
date on the updates of pgsql. Some updates aren't critical, but most
early ones in the 7.x through 8.1 tended to have a lot of bugs fixed
in them in the first few updates.

Then, your migration to 8.3.x can be done a bit more leisurely and
well planned and tested, without putting your current data in danger.

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