On Wed, Nov 05, 2003 at 08:03:43PM +0000, Roger Hayter wrote: > In message <[EMAIL PROTECTED]>, Martin Stone Davis > <[EMAIL PROTECTED]> writes > >Roger Hayter wrote: > > > >>In message <[EMAIL PROTECTED]>, Martin Stone Davis > >><[EMAIL PROTECTED]> writes > >> > ><SNIP> > >>>Roger Hayter wrote: > >>> > >>>Specialization: > >>>--------------- > >>>I guess the idea is that if there are 10 areas of specialization, > >>>and we know 5 that specialize in the first area, but all 5 regularly > >>>QR, then we begin diluting the specialization of the other nodes > >>>which aren't specialized in the first area. Did I state the problem > >>> > >> Not entirely, suppose we start with 10 nodes which are only 0.1% > >>specialised due to random variations in what they have cached, and are > >>never likely to get more specialised. > > > >Why aren't they likely to get more specialized? Can you draw out your > >example a bit more? > > Well, if speed of rejection favours a node many times more than what it > is good at retrieving, then there is little or no selection pressure in
It doesn't. Rate of rejection perhaps. But it has been explained that the probability of a QueryRejection is multiplied by the sum of the rejection time AND the time for a successful request from another node. > favour of a given specialisation. I am suggesting there is a threshold > of selection pressure below which it has no effect, because random > events in the node have a bigger effect on specialisation than any net > specialisation of requests, over relevant time periods. Well unfortunately at the moment the probability of the node QueryRejected'ing may well be a dominating factor in NGRouting - but I don't think the solution is to radically alter NGRouting, the solution is to make the nodes QR less. -- Matthew J Toseland - [EMAIL PROTECTED] Freenet Project Official Codemonkey - http://freenetproject.org/ ICTHUS - Nothing is impossible. Our Boss says so.
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