Re: Core team statement on replication in PostgreSQL

On Wed, 2008-06-04 at 11:37 -0400, Tom Lane wrote:

> This thread is getting out of hand, actually.

Agreed. We should start new threads for specific things. Please.

> However, since by definition pg_control doesn't change in a minor
> upgrade, there isn't any easy way to enforce a rule like "slaves must be
> same or newer minor version as the master".  I'm not sure that we
> actually *want* to enforce such a rule, though. 

Definitely don't want to prevent minor version mismatches. We want to be
able to upgrade a standby, have it catch up with the master then
switchover to the new version. Otherwise we'd have to take whole
replicated system down to do minor upgrades/backouts. Ugh!

-- Simon Riggs           www.2ndQuadrant.comPostgreSQL Training, Services and Support