Re: "Hot standby"?

On Wed, Aug 12, 2009 at 12:11:28AM +0300, Peter Eisentraut wrote:
> On Tuesday 11 August 2009 18:16:04 Gianni Ciolli wrote:
> > As for "warm/hot", it depends on what you exactly mean with "get
> > ready":
> >
> > (A) If you mean "it is possible to connect to the second node", then
> >     Simon's patch is "hot".
> 
> Yeah, but by that definiton doing a pg_dump/pg_restore every hour is also 
> "hot". ;-)

OK, but only if (a) the data is so small that the restore takes less
than one hour, and if (b) the workload is far from 100% ;-)

Since there seem to be multiple views about terminology, it may be
useful to recall the proposed wording from
http://wiki.postgresql.org/wiki/Hot_Standby :

* the first node is called either "Primary" or "Master" 

* the second node is called "Standby" 

* the Standby is referred to as a "Clone" instead of a "Slave", to mean that it is an exact copy, which, instead of
beingbuilt by repeating the actions of the master, is constructed just by implementing their effects.
 

Best regards,
Dr. Gianni Ciolli - 2ndQuadrant Italia
PostgreSQL Training, Services and Support
gianni.ciolli@2ndquadrant.it | www.2ndquadrant.it