Synchronous loading of a zone

[Stephane Bortzmeyer]

On Tue, Apr 04, 2006 at 12:39:09PM -0400,
 Sebastian E. Castro Avila <secastro at nic.cl> wrote 
 a message of 22 lines which said:

> Waiting a fixed amount of time to check if the zone was loaded it is
> not a perfect solution (prone to errors).

Polling the server every three seconds until the SOA changes?

[I assume that the load is atomic, that BIND changes all the records
or none, but I did not check.]