š
Original date posted:2015-07-23
š Original message: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 at lists.linuxfoundation.org>:
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> Hash: SHA256
>
>
>
> On 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev <
> bitcoin-dev at 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.
>
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> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev at lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
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Marcel Jamin [ARCHIVE] /
npub14jā¦vk3rk
2023-06-07 15:43:19
in reply to nevent1qā¦l5aq
Author Public Key
npub14jegtpz2t9nfnefqqr0q4te9353e4k4x5y2528qf235ruluzsaes8vk3rkPublished at
2023-06-07 15:43:19Event JSON
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Original date posted:2015-07-23\nš Original message:He measured the upload capacity of the peers by downloading from them, or\nam I being dumb? :)\n\n\n2015-07-23 18:05 GMT+02:00 Peter Todd via bitcoin-dev \u003c\nbitcoin-dev at lists.linuxfoundation.org\u003e:\n\n\u003e -----BEGIN PGP SIGNED MESSAGE-----\n\u003e Hash: SHA256\n\u003e\n\u003e\n\u003e\n\u003e On 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev \u003c\n\u003e bitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\u003e \u003eThis does not support the theory that the network has the available\n\u003e \u003ebandwidth for increased block sizes, as in its current state 37% of\n\u003e \u003enodes would fail to upload a 20MB block to a single peer in under 20\n\u003e \u003eseconds (referencing a number quoted by Gavin). If the bar for\n\u003e \u003esuitability is placed at taking only 1% of the block time (6 seconds)\n\u003e \u003eto upload one block to one peer, then 69% of the network fails for 20MB\n\u003e \u003eblocks. For comparison, only 10% fail this metric for 1MB blocks.\n\u003e\n\u003e Note how due to bandwidth being generally asymetric your findings are\n\u003e probably optimistic - you've measured download capacity. On top of that\n\u003e upload is further reduced by the fact that multiple peers at once need to\n\u003e be sent blocks for reliability.\n\u003e\n\u003e Secondly you're measuring a network that isn't under attack - we need\n\u003e significant additional margin to resist attack as performance is\n\u003e consensus-critical.\n\u003e\n\u003e -----BEGIN PGP SIGNATURE-----\n\u003e\n\u003e iQE9BAEBCAAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJVsRCj\n\u003e AAoJEMCF8hzn9Lnc47AIAIQbznavjd2Rbqxeq5a3GLqeYoI4BZIQYqfWky+6OQtq\n\u003e yGRKaqPtGuES5y9L0k7efivT385mOl87PWnWMy61xxZ9FJgoS+YHkEx8K4tfgfA2\n\u003e yLOKzeFSar2ROCcjHYyPWa2XXjRbNmiLzfNuQyIBArg/Ch9//iXUUM+GG0mChF5k\n\u003e nUxLstXgXDNh5H8xkHeLi4lEbt9HFiwcZnT1Tzeo2dvVTujrtyNb/zEhNZScMXDc\n\u003e UOlT8rBLxzHlytKdXt1GNKIq0feTRJNbreBh7/EB4nYTT54CItaaVXul0LdHd5/2\n\u003e kgKtdbUdeyaRUKrKcvxiuIwclyoOuRQp0DZThsB262o=\n\u003e =tBUM\n\u003e -----END PGP SIGNATURE-----\n\u003e\n\u003e _______________________________________________\n\u003e bitcoin-dev mailing list\n\u003e bitcoin-dev at lists.linuxfoundation.org\n\u003e https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev\n\u003e\n-------------- next part --------------\nAn HTML attachment was scrubbed...\nURL: \u003chttp://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20150723/a4aa2bc7/attachment.html\u003e",
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