š
Original date posted:2015-07-23
š Original message:-----BEGIN PGP SIGNED MESSAGE-----
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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Peter Todd [ARCHIVE] /
npub1m2ā¦a2np2
2023-06-07 15:43:19
in reply to nevent1qā¦8ngg
Author Public Key
npub1m230cem2yh3mtdzkg32qhj73uytgkyg5ylxsu083n3tpjnajxx4qqa2np2Published at
2023-06-07 15:43:19Event JSON
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Original date posted:2015-07-23\nš Original message:-----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA256\n\n\n\nOn 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev \u003cbitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\u003eThis does not support the theory that the network has the available\n\u003ebandwidth for increased block sizes, as in its current state 37% of\n\u003enodes would fail to upload a 20MB block to a single peer in under 20\n\u003eseconds (referencing a number quoted by Gavin). If the bar for\n\u003esuitability is placed at taking only 1% of the block time (6 seconds)\n\u003eto upload one block to one peer, then 69% of the network fails for 20MB\n\u003eblocks. For comparison, only 10% fail this metric for 1MB blocks.\n\nNote 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.\n\nSecondly you're measuring a network that isn't under attack - we need significant additional margin to resist attack as performance is consensus-critical.\n\n-----BEGIN PGP SIGNATURE-----\n\niQE9BAEBCAAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJVsRCj\nAAoJEMCF8hzn9Lnc47AIAIQbznavjd2Rbqxeq5a3GLqeYoI4BZIQYqfWky+6OQtq\nyGRKaqPtGuES5y9L0k7efivT385mOl87PWnWMy61xxZ9FJgoS+YHkEx8K4tfgfA2\nyLOKzeFSar2ROCcjHYyPWa2XXjRbNmiLzfNuQyIBArg/Ch9//iXUUM+GG0mChF5k\nnUxLstXgXDNh5H8xkHeLi4lEbt9HFiwcZnT1Tzeo2dvVTujrtyNb/zEhNZScMXDc\nUOlT8rBLxzHlytKdXt1GNKIq0feTRJNbreBh7/EB4nYTT54CItaaVXul0LdHd5/2\nkgKtdbUdeyaRUKrKcvxiuIwclyoOuRQp0DZThsB262o=\n=tBUM\n-----END PGP SIGNATURE-----",
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