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From: Bram Cohen <bram@bittorrent.com>
To: "t. khan" <teekhan42@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 15:12:25 -0800	[thread overview]
Message-ID: <CA+KqGkq6soxt-SK4Liby5NE=QSt4-OTZ-FfsEd6qDGwvZpnpKQ@mail.gmail.com> (raw)
In-Reply-To: <CAGCNRJqdu7DMC+AMR4mYKRAYStRMKVGqbnjtEfmzcoeMij5u=A@mail.gmail.com>

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On Mon, Dec 5, 2016 at 7:27 AM, t. khan via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

>
> Put another way: let’s stop thinking about what the max block size should
> be and start thinking about how full we want the average block to be
> regardless of size. Over the last year, we’ve had averages of 75% or
> higher, so aiming for 75% full seems reasonable, hence naming this concept
> ‘Block75’.
>

That's effectively making the blocksize limit completely uncapped and only
preventing spikes, and even in the case of spikes it doesn't differentiate
between 'real' traffic and low value spam attacks. It suffers from the same
fundamental problems as bitcoin unlimited: There are in the end no
transaction fees, and inevitably some miners will want to impose some cap
on block size for practical purposes, resulting in a fork.

Difficulty adjustment works because there's a clear goal of having a
certain rate of making new blocks. Without a target to attempt automatic
adjustment makes no sense.

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  parent reply	other threads:[~2016-12-10 23:12 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-05 15:27 [bitcoin-dev] Managing block size the same way we do difficulty (aka Block75) 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 [this message]
2016-12-11  0:52   ` t. khan
     [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
2016-12-11  3:17                 ` Daniele Pinna
2016-12-11  5:29                   ` Eric Voskuil
2016-12-11  9:21                   ` Adam Back

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