Re: Opening a recovering DB in for read-only access?

On Fri, 2008-11-21 at 15:45 +1100, Philip Warner wrote:
> Sounds somewhat evil, I know, but I was wondering if it was even
> remotely possible with the current design?
> 
> The reason: we are contemplating using pg_standy to create a
> warm-standby. It would be a bonus if we would run read-only queries
> against this DB to take some of the load off or production servers.
> 
> We currently use slony to provide warm-standby *and* read-only access,
> but pg_standby is a great deal more appealing...especially if there was
> some way to do read-only access at the same time.

Yes, exactly what I'm working on now, currently patch in review.

> FWIW, the data would not even need to be completely consistent ... the
> kinds of things we are looking at offloading are large summary-type
> sequential scans of big tables.

Access to inconsistent data has not been agreed. We will only allow
access to consistent data with this approach.

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