Quote from: TierNolan on February 26, 2016, 08:27:04 PM

Quote from: trout on February 26, 2016, 05:30:31 PM

since every peer has to receive every transactions eventually, it seems that Transactions * Peers is the absolute
minimum of transaction sends you'd need. Am I missing something trivial here?

On average each node should receive each transaction once and send it onward once. Better connected nodes would tend to have more peers who haven't seen the transaction and so request it.

That is where the suggestion to pick 2 nodes to forward it to comes from. If each node immediately sends it to 2 others, pretty soon the whole network knows about the transaction. It doesn't matter how many you are connected to, you only really need to forward it to 2.

The more efficient method could be used later to catch detect peers who didn't get it.

with a fanout of 2 and 6000 nodes, wouldnt it be 10 to 12 hops on average? assuming average ping time of 300 millis, plus latency of ?, I guess it is ~5 seconds. pretty good.

If a bit of privacy is sacrificed and it is started with sending to 16 peers, I think that would reduce things by 3 hops or so. probably not worth doing. But it would dramatically reduce the chances of a propagation "fizzling" out. That could be avoided by retransmitting to a pair of two other peers if the tx is not seen in the network after 15 seconds

James