Re: Versioning policy and pg_upgrade

On Thu, Feb 3, 2011 at 00:26, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> Bruce Momjian wrote:
>> Joshua D. Drake wrote:
>> > On Mon, 2010-08-16 at 13:59 +0100, Thom Brown wrote:
>> >
>> > > But I propose expanding it to read:
>> > >
>> > > "Major releases usually change the internal format of system tables
>> > > and data files. These changes are often complex, so we don't maintain
>> > > backward compatibility for data files. A dump/reload of the database
>> > > cluster is required for major upgrades for upgrading from 8.2 or
>> > > earlier.  For upgrading from version 8.3 and later, there is the
>> > > option to use pg_upgrade (also known as pg_migrator prior to version
>> > > 9.0), capable of in-place upgrades.  This means, for example, you can
>> > > upgrade any minor version of 8.3 to 8.4 without having to perform a
>> > > full backup and restore, resulting in a significantly faster upgrade."
>> > >
>> > > Too wordy?
>> >
>> > Yes :D (well I think so):
>> >
>> > "A Major release changes the internal data format of the cluster.
>> > Due to this change a dump/reload of the cluster is required for major
>> > upgrades for upgrading from 8.2 or earlier.
>> >
>> > If upgrading from version 8.3 and later, certain installs may be able to
>> > use pg_upgrade (previously named pg_migrator). If pg_upgrade is
>> > compatible with your cluster (see the docs) you will able to perform an
>> > in-place upgrades. Although downtime is still required, this is much
>> > quicker than a dump/restore."
>>
>> Based on this discussion from August, I suggest the following patch be
>> applied to versioning.html.  It mentions pg_upgrade as an major upgrade
>> option and links to the pg_upgrade page that has all the details.
>
> FYI, I am still waiting for someone to apply this patch.

Seems Dave applied this without acknowledging it here. I accidentally
reversed it, and have now put it back in again :-) Sorry about the
delay and the confusion.

--
 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/