He measured the upload capacity of the peers by downloading from them, or am I being dumb? :)
2015-07-23 18:05 GMT+02:00 Peter Todd via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org>: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > > > On 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev < > bitcoin-dev@lists.linuxfoundation.org> wrote: > >This does not support the theory that the network has the available > >bandwidth for increased block sizes, as in its current state 37% of > >nodes would fail to upload a 20MB block to a single peer in under 20 > >seconds (referencing a number quoted by Gavin). If the bar for > >suitability is placed at taking only 1% of the block time (6 seconds) > >to upload one block to one peer, then 69% of the network fails for 20MB > >blocks. For comparison, only 10% fail this metric for 1MB blocks. > > Note how due to bandwidth being generally asymetric your findings are > probably optimistic - you've measured download capacity. On top of that > upload is further reduced by the fact that multiple peers at once need to > be sent blocks for reliability. > > Secondly you're measuring a network that isn't under attack - we need > significant additional margin to resist attack as performance is > consensus-critical. > > -----BEGIN PGP SIGNATURE----- > > iQE9BAEBCAAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJVsRCj > AAoJEMCF8hzn9Lnc47AIAIQbznavjd2Rbqxeq5a3GLqeYoI4BZIQYqfWky+6OQtq > yGRKaqPtGuES5y9L0k7efivT385mOl87PWnWMy61xxZ9FJgoS+YHkEx8K4tfgfA2 > yLOKzeFSar2ROCcjHYyPWa2XXjRbNmiLzfNuQyIBArg/Ch9//iXUUM+GG0mChF5k > nUxLstXgXDNh5H8xkHeLi4lEbt9HFiwcZnT1Tzeo2dvVTujrtyNb/zEhNZScMXDc > UOlT8rBLxzHlytKdXt1GNKIq0feTRJNbreBh7/EB4nYTT54CItaaVXul0LdHd5/2 > kgKtdbUdeyaRUKrKcvxiuIwclyoOuRQp0DZThsB262o= > =tBUM > -----END PGP SIGNATURE----- > > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev >
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