On Thu, 2008-04-03 at 10:26 -0400, Christopher Browne wrote:
> Cyril SCETBON <scetbon at echo.fr> writes:
> > As said Christopher Brown new commands are coming : CLONE PREPARE and
> > CLONE FINISH to bypass this mecanism
> >
> > see http://lists.slony.info/pipermail/slony1-commit/2008-January/002145.html
> 
> They do, to a degree, but not completely.  The CLONE commands operate
> on subscribers, so you need to have at least one subscriber in order
> to start cloning.
> 
> It would be in principle possible to do a "clone" against a master; we
> prepared a gedanken experiment as to how this would be done...  It
> would require a slight outage to establish a synchronization point,
> which makes it somewhat problematic, and which is why we haven't
> pursued the more extensive cloning.

Will an outage of 100 msec be enough ?

You just need a point where there is no active transactions ?

Maybe one should look, how this was achieved fro CONCURRENT VACUUM; 

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Hannu