Re: Migrate postgres to newer hardware

Hi Renato,

dump/restore is the way to go. I suppose, you don't want to compile
Postgres for 32 bit on the new machine which might work and might allow
you to do the PITR migration.

And "downtime is not an option" is always a sign of insufficient
planning beforehand. There is no system which doesn't need an upgrade or
reboot or whatever, so there will be downtime and it needs to be
considered during system analysis.

In my experience, it is often just a matter of communicating: "Because
of hardware upgrades, the system XYZ will not be available on ..."

After all the switch won't be without interruption - you need to switch
to the new server anyway.

Tino, having migrated a 300+ GB database.

On Tue, Mar 30, 2010 at 04:29:29PM +0200, Iñigo Martinez Lasala wrote:

> I would follow the ancient method: perform a pg_dump / pg_restore
>
> Yes, you will have to take offline database for a long period.
>
> And yes, it would be a great moment to perform a 8.4 upgrade.
> Performance is far superior, restore is far faster...
> ... and yes, it could give you many problems if you don't perform many
> test in order to address all queries without explicit type conversions
> before real migration, but I think it's the best moment to deal with a
> very convenient upgrade.
>
> We have performed this upgrade last week with a gforge (with only 25GB
> database) and having also to upgrade to new tsearch2 and everything is
> running smooth.
>
> -----Original Message-----
> From: Renato Oliveira <renato(dot)oliveira(at)grant(dot)co(dot)uk>
> To: pgsql-admin(at)postgresql(dot)org <pgsql-admin(at)postgresql(dot)org>
> Subject: [ADMIN] Migrate postgres to newer hardware
> Date: Tue, 30 Mar 2010 12:18:36 +0100
>
> Dear All,
>
>
>
> What would be the easiest and fastest way to migrate Postgres 8.2.24 32
> BIT to a new server 64 Bit.
>
>
>
> The existing server runs on 32 bit architecture and has a database as
> big as 160GB.
>
>
>
> We initially thought of using PITR, but as one of the PITR requirements
> is both machines need to be similar.
>
> This similarity needs to be even in architecture? I think I read
> something which says “Yes”.
>
>
>
> If we cannot use PITR what would be the best approach, we can’t have
> down time I am afraid.
>
>
>
> Any ideas or suggestions would be very welcome.
>
>
>
> Thank you very much
>
>
>
> Best regards
>
>
>
> Renato
>
>
>
>
>
>
>
> Renato Oliveira
> Systems Administrator
> e-mail: renato(dot)oliveira(at)grant(dot)co(dot)uk
>
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