On Mon, Jan 18, 2010 at 7:25 AM, Nickolay <nitro at zhukcity.ru> wrote:
> Everything works just fine, until I execute FAILOVER or DROP NODE (may
> be MOVE SET does it too, I don't know).
>


what versions of everything do you have?  I've never seen any data
loss on a MOVE SET or DROP NODE.  I haven't done DROP NODE very often,
so I can't say how robust that is.

Slony does operate at transaction boundaries, and takes locks on
tables to prevent other operations from happening, so it is hard to
see how this kind of error would happen.