Ask Bjørn Hansen wrote on 20-9-2007 3:11:
Is this still an issue with the new DNS system? In the new DNS system you get _much_ less traffic than previously if you're configured with low bandwidth.If it is an issue then we should start a page on the wiki with a list of recommended and not-recommended routers and a page for each router that can be configured to work with descriptions of the configuration...
I'm still seeing some bursts > 100 kbps (graph of last 48 hr attached), corresponding to > 150 requests per second. With a slot lifetime of 60 seconds that would require > 9000 slots. Some consumer routers I've seen have 1000 to 4000 slots, sometimes with a UDP slot lifetime of 5 minutes... Those routers would not only drop ntp packets, but also affect other traffic of the pool member (in the worst case causing the pool to loose that member).
Even if you can manage to eliminate spikes further, it may become tricky again as soon as pool usage grows faster than pool members.
I'm thinking about writing a general description of stateless routing. Detailed setup instructions for all sorts of routers would be better, but there's so much equipment on the market and the lifespan of a model is short. It would be a huge and ongoing project.
From what I see, I have the impression there is a category of "power members" in the pool. Hosted machines with lots of bandwidth and no nat. Do they complain about spikes? Guess not. Apart from bandwidth, the nat category ("no nat", "stateless nat", "stateful nat (with x slots)") might be an interesting criteria for the DNS system.
Well, just some thoughts, I don't see a winning stategy yet. Jan
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