From: "Joseph Gleason ⑈" <fireduck@gmail•com>
To: Marcel Jamin <marcel@jamin•net>, Peter Todd <pete@petertodd•org>
Cc: slurms--- via bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Bitcoin Node Speed Test
Date: Thu, 23 Jul 2015 19:57:38 +0000 [thread overview]
Message-ID: <CA+ASnrGrBr6-QGaMx6j8aGZc+q+W6WpGy3okJRMa+TwHsnwxYg@mail.gmail.com> (raw)
In-Reply-To: <CAAUq485RqbNpBa6i34H517Oo4+MHkT683inwU-sMX3Y=vBTwqg@mail.gmail.com>
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That is how I read it as well.
On Thu, Jul 23, 2015 at 12:56 PM Marcel Jamin via bitcoin-dev <
bitcoin-dev@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@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.
>>
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>>
>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev@lists•linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists•linuxfoundation.org
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>
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next prev parent reply other threads:[~2015-07-23 19:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-23 14:19 slurms
2015-07-23 15:04 ` Gavin Andresen
2015-07-23 15:55 ` Jameson Lopp
2015-07-23 17:14 ` Slurms MacKenzie
2015-07-23 17:41 ` Pindar Wong
2015-07-23 16:05 ` Peter Todd
2015-07-23 19:56 ` Marcel Jamin
2015-07-23 19:57 ` Joseph Gleason ⑈ [this message]
2015-07-24 2:55 ` Peter Todd
2015-07-23 16:36 ` Leo Wandersleb
2015-07-23 17:12 ` Slurms MacKenzie
2015-07-24 2:48 ` Matt Corallo
2015-07-24 3:19 ` Slurms MacKenzie
2015-07-24 3:54 ` grarpamp
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