📅 Original date posted:2015-07-23
📝 Original message:That is how I read it as well.
On Thu, Jul 23, 2015 at 12:56 PM Marcel Jamin via bitcoin-dev <
bitcoin-dev at lists.linuxfoundation.org> wrote:
> 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>:
>
>> -----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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>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev at lists.linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev at lists.linuxfoundation.org
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Joseph Gleason ⑈ [ARCHIVE] /
npub1qp…my8sw
2023-06-07 15:43:20
in reply to nevent1q…ewnr
Author Public Key
npub1qp59a7k7vxv0k8z277f50092ljk9mjg5du9lz8hlft37u4ggwqes5my8swPublished at
2023-06-07 15:43:20Event JSON
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"content": "📅 Original date posted:2015-07-23\n📝 Original message:That is how I read it as well.\n\n\nOn Thu, Jul 23, 2015 at 12:56 PM Marcel Jamin via bitcoin-dev \u003c\nbitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\n\u003e He measured the upload capacity of the peers by downloading from them, or\n\u003e am I being dumb? :)\n\u003e\n\u003e\n\u003e 2015-07-23 18:05 GMT+02:00 Peter Todd via bitcoin-dev \u003c\n\u003e bitcoin-dev at lists.linuxfoundation.org\u003e:\n\u003e\n\u003e\u003e -----BEGIN PGP SIGNED MESSAGE-----\n\u003e\u003e Hash: SHA256\n\u003e\u003e\n\u003e\u003e\n\u003e\u003e\n\u003e\u003e On 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev \u003c\n\u003e\u003e bitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\u003e\u003e \u003eThis does not support the theory that the network has the available\n\u003e\u003e \u003ebandwidth for increased block sizes, as in its current state 37% of\n\u003e\u003e \u003enodes would fail to upload a 20MB block to a single peer in under 20\n\u003e\u003e \u003eseconds (referencing a number quoted by Gavin). If the bar for\n\u003e\u003e \u003esuitability is placed at taking only 1% of the block time (6 seconds)\n\u003e\u003e \u003eto upload one block to one peer, then 69% of the network fails for 20MB\n\u003e\u003e \u003eblocks. For comparison, only 10% fail this metric for 1MB blocks.\n\u003e\u003e\n\u003e\u003e Note how due to bandwidth being generally asymetric your findings are\n\u003e\u003e probably optimistic - you've measured download capacity. On top of that\n\u003e\u003e upload is further reduced by the fact that multiple peers at once need to\n\u003e\u003e be sent blocks for reliability.\n\u003e\u003e\n\u003e\u003e Secondly you're measuring a network that isn't under attack - we need\n\u003e\u003e significant additional margin to resist attack as performance is\n\u003e\u003e consensus-critical.\n\u003e\u003e\n\u003e\u003e -----BEGIN PGP SIGNATURE-----\n\u003e\u003e\n\u003e\u003e iQE9BAEBCAAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJVsRCj\n\u003e\u003e AAoJEMCF8hzn9Lnc47AIAIQbznavjd2Rbqxeq5a3GLqeYoI4BZIQYqfWky+6OQtq\n\u003e\u003e yGRKaqPtGuES5y9L0k7efivT385mOl87PWnWMy61xxZ9FJgoS+YHkEx8K4tfgfA2\n\u003e\u003e yLOKzeFSar2ROCcjHYyPWa2XXjRbNmiLzfNuQyIBArg/Ch9//iXUUM+GG0mChF5k\n\u003e\u003e nUxLstXgXDNh5H8xkHeLi4lEbt9HFiwcZnT1Tzeo2dvVTujrtyNb/zEhNZScMXDc\n\u003e\u003e UOlT8rBLxzHlytKdXt1GNKIq0feTRJNbreBh7/EB4nYTT54CItaaVXul0LdHd5/2\n\u003e\u003e kgKtdbUdeyaRUKrKcvxiuIwclyoOuRQp0DZThsB262o=\n\u003e\u003e =tBUM\n\u003e\u003e -----END PGP SIGNATURE-----\n\u003e\u003e\n\u003e\u003e _______________________________________________\n\u003e\u003e bitcoin-dev mailing list\n\u003e\u003e bitcoin-dev at lists.linuxfoundation.org\n\u003e\u003e https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev\n\u003e\u003e\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/20150723/1b3c9718/attachment.html\u003e",
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