On 13 okt 2009, at 22.11, Ondřej Surý wrote: >> Ultimately though I like the NOTIFY solution best. > > And it's direct violation of RFC1996. I wouldn't call it "solution", > but a "hack". While I consider it to be fine for Marcus (it's his > network after all), I would be extremely unhappy to see this in > unbound upstream. I haven't made any statements regarding this so far, but I will now. I agree completely with Ondrey here and I would recommend against implementing cache flush using NOTIFY. there are far better, and protocol-wise more prudent, ways to implement this feature. jakob (speaking as one of the original designers of the Unbound architecture)