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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Block Size Increase Requirements
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--047d7bd9131a9ac74a05174d1fa1
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On Sat, May 30, 2015 at 9:57 PM, Gavin Andresen <gavinandresen@gmail.com>
wrote:
> On Fri, May 29, 2015 at 7:42 PM, Chun Wang <1240902@gmail.com> wrote:
>
>> Hello. I am from F2Pool. We are currently mining the biggest blocks on
>> the network.
>
>
> Thanks for giving your opinion!
>
>
>
>> Bad miners could attack us and the network with artificial
>> big blocks.
>
>
> How?
>
> I ran some simulations, and I could not find a network topology where a
> big miner producing big blocks could cause a loss of profit to another
> miner (big or small) producing smaller blocks:
>
> http://gavinandresen.ninja/are-bigger-blocks-better-for-bigger-miners
>
> (the 0.3% advantage I DID find was for the situation where EVERYBODY was
> producing big blocks).
>
>
>> We think
>> the max block size should be increased, but must be increased
>> smoothly, 2 MB first, and then after one or two years 4 MB, then 8 MB,
>> and so on. Thanks.
>
>
> Why 2 MB ? You said that server bandwidth is much more expensive in
> China; what would be the difference in your bandwidth costs between 2MB
> blocks and 20MB blocks?
>
Perhaps we should arrange to run some more 'simulations' with miners from
China and elsewhere?
Let me know there's interest to do.
p.
>
>
> --
> --
> Gavin Andresen
>
>
> ------------------------------------------------------------------------------
>
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
>
>
--047d7bd9131a9ac74a05174d1fa1
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><br><br><div class=3D"gmail_extra"><br><div class=3D"gmail=
_quote">On Sat, May 30, 2015 at 9:57 PM, Gavin Andresen <span dir=3D"ltr">&=
lt;<a href=3D"mailto:gavinandresen@gmail.com" target=3D"_blank">gavinandres=
en@gmail.com</a>></span> wrote:<br><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmai=
l_quote"><span class=3D"">On Fri, May 29, 2015 at 7:42 PM, Chun Wang <span =
dir=3D"ltr"><<a href=3D"mailto:1240902@gmail.com" target=3D"_blank">1240=
902@gmail.com</a>></span> wrote:<br><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padd=
ing-left:1ex">Hello. I am from F2Pool. We are currently mining the biggest =
blocks on<br>
the network. </blockquote><div><br></div></span><div>Thanks for giving your=
opinion!</div><span class=3D""><div><br></div><div>=C2=A0</div><blockquote=
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex">Bad miners could attack us and the n=
etwork with artificial<br>
big blocks.</blockquote><div><br></div></span><div>How?</div><div><br></div=
><div>I ran some simulations, and I could not find a network topology where=
a big miner producing big blocks could cause a loss of profit to another m=
iner (big or small) producing smaller blocks:</div><div><br></div><div><a h=
ref=3D"http://gavinandresen.ninja/are-bigger-blocks-better-for-bigger-miner=
s" target=3D"_blank">http://gavinandresen.ninja/are-bigger-blocks-better-fo=
r-bigger-miners</a><br></div><div><br></div><div>(the 0.3% advantage I DID =
find was for the situation where EVERYBODY was producing big blocks).</div>=
<span class=3D""><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">We think<br>
the max block size should be increased, but must be increased<br>
smoothly, 2 MB first, and then after one or two years 4 MB, then 8 MB,<br>
and so on. Thanks.</blockquote><div><br></div></span><div>Why 2 MB ? =C2=A0=
You said that server bandwidth is much more expensive in China; what would=
be the difference in your bandwidth costs between 2MB blocks and 20MB bloc=
ks?</div></div></div></div></blockquote><div><br><div>Perhaps we should arr=
ange to run some more 'simulations' with miners from China and else=
where? <br><br></div><div>Let me know there's interest to do.<br></div>=
<div><br></div>p. <br></div><blockquote class=3D"gmail_quote" style=3D"marg=
in:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x"><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><=
span class=3D""><font color=3D"#888888"><div><br></div><div>=C2=A0</div></f=
ont></span></div><span class=3D""><font color=3D"#888888">-- <br><div>--<br=
>Gavin Andresen<br></div>
</font></span></div></div>
<br>-----------------------------------------------------------------------=
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pment@lists.sourceforge.net</a><br>
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velopment</a><br>
<br></blockquote></div><br></div></div>
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