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>> Please describe the formula through which to calculate the speed of
>> the data that you need to send to your peer, which has 19 other peers
>> (and you have no knowledge about the speed with which they are
>> transmitting).
>
> Simple:
>
> for i in output-bandwidth
> for j in list-of-peers
> if <j said it was ok to send stuff over within the last minute>
> send <remaining-output-bandwidth, weighted for particular peer>
> end
> end
>
> In other words, the main thing is I have to explicitly say I am
> expecting stuff, and that there is an explicit timeperiod beyond which
> other peers should not continue sending me stuff, without my saying
> it's ok.
>
> Similarly, on the receiving end, I will only read packets from peers on
> my connected-list. (Yes, this is kindof like wasting bandwidth and
> dropping precious packets ... but remember this is AFTER we give our
> flooding peer ample time to settle down -- aka. this is bordering on
> malicious / ddos behavior.)
I think that would make the problem much worse:
Scenario:
You have a spike of CPU useage and your node receives little packets over 1
minute. It calculates how much it could have received more and sends all its
peers request to almost entire bandwidth. Then the CPU spike ends and it gets
swamped with about 20 times the download limit of packets. It then starts
dropping packets because it considers this an attack, hurting not only its ow
self, but others in the process.
- Volodya
- --
http://freedom.libsyn.com/ Echo of Freedom, Radical Podcast
"None of us are free until all of us are free." ~ Mihail Bakunin
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