From: Pieter Wuille <pieter.wuille@gmail•com>
To: Daniele Pinna <daniele.pinna@gmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Managing block size the same way we do difficulty (aka Block75)
Date: Sat, 10 Dec 2016 09:39:57 -0800 [thread overview]
Message-ID: <CAPg+sBiZmRdLOgG9iN2hOWVr_eCLTwDrbuETd_w9-bUJOfTjgw@mail.gmail.com> (raw)
In-Reply-To: <CAEgR2PEvpEwv=a0syn43negEnvGcoQ8LBxKRp4-JpnxCNORJSg@mail.gmail.com>
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On Sat, Dec 10, 2016 at 4:23 AM, Daniele Pinna via bitcoin-dev <
bitcoin-dev@lists•linuxfoundation.org> wrote:
> We have models for estimating the probability that a block is orphaned
> given average network bandwidth and block size.
>
> The question is, do we have objective measures of these two quantities?
> Couldn't we target an orphan_rate < max_rate?
>
Models can predict orphan rate given block size and network/hashrate
topology, but you can't control the topology (and things like FIBRE hide
the effect of block size on this as well). The result is that if you're
purely optimizing for minimal orphan rate, you can end up with a single
(conglomerate of) pools producing all the blocks. Such a setup has no
propagation delay at all, and as a result can always achieve 0 orphans.
Cheers,
--
Pieter
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next prev parent reply other threads:[~2016-12-10 17:39 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAEgR2PEMPo3veqJat7OAps1DzTSNFJmJiRbkFgYKvYfxqdbUiw@mail.gmail.com>
[not found] ` <CAEgR2PELB1_s+o0Bj4Kj9vS27eoqP7gV_VS_6QHQtTUAOnMORg@mail.gmail.com>
[not found] ` <CAEgR2PFpGWxngq=fKGi7CC_d+=5YWzWwbEEsQNEifCuHAAPAHw@mail.gmail.com>
[not found] ` <CAEgR2PHnrsdaBiDgywvE9amK8_yPE_hBo0yYOYwUk4T8n7wnAQ@mail.gmail.com>
[not found] ` <CAEgR2PEgPkRe76hW0Jj7_Z1EdmmNTpTAOKGm_of2dG=XXUOtnA@mail.gmail.com>
[not found] ` <CAEgR2PHew+fcJWnAt+t8umcwKu4TkshH=AFJ-8MeYysud2MkBQ@mail.gmail.com>
[not found] ` <CAEgR2PEVwt_shiqwGjK6dPscRUTHayis0PaQO5Dj_fVEGGgaCQ@mail.gmail.com>
2016-12-10 12:23 ` Daniele Pinna
2016-12-10 17:39 ` Pieter Wuille [this message]
2016-12-11 3:17 ` Daniele Pinna
2016-12-11 5:29 ` Eric Voskuil
2016-12-11 9:21 ` Adam Back
2016-12-05 15:27 t. khan
2016-12-10 10:44 ` s7r
2016-12-10 12:05 ` Hampus Sjöberg
2016-12-11 0:26 ` t. khan
2016-12-11 0:40 ` James Hilliard
2016-12-11 1:07 ` Bram Cohen
2016-12-11 17:11 ` s7r
2016-12-11 19:55 ` t. khan
2016-12-11 20:31 ` James Hilliard
2016-12-11 21:40 ` t. khan
2016-12-11 21:53 ` Bram Cohen
2016-12-11 21:55 ` James Hilliard
2016-12-11 22:30 ` t. khan
2016-12-11 20:38 ` Andrew Johnson
2016-12-11 23:22 ` s7r
2016-12-18 21:53 ` James MacWhyte
2016-12-19 1:42 ` Tom Harding
2016-12-10 23:12 ` Bram Cohen
2016-12-11 0:52 ` t. khan
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