[nsd-users] reloading NSD zone configuration

[Antti Ristimäki]

On Tue, 28 Apr 2009, Jelte Jansen wrote:
> If you restart NSD, with some new slave zones added, it will serve existing
> zones as soon as it is up (i.e. within seconds on most systems, see below for my
> private setup and some very anecdotal timing benchmarks). It will also start to
> transfer the new slave zones, but while it is doing that it already serves
> existing ones.

Thank you for this very valuable information. Restart times of this 
magnitude would be acceptable for us, given that the frequency of zone 
additions is rather low in our environment.

> Throwing queries against it
> from the other side i would estimate that 1 or 2 seconds of those are spent
> waiting for the previous process to stop, at which point it is still serving.

Regarding the process stopping phase, what would be expected to happen in 
case that one or more zone transfers are pending at the same time when 
SIGTERM is sent to the previous process?

BR,

Antti