From: Pindar Wong <pindar.wong@gmail•com>
To: Chun Wang <1240902@gmail•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Fwd: Block Size Increase Requirements
Date: Sun, 31 May 2015 10:20:42 +0800 [thread overview]
Message-ID: <CAM7BtUoq_j+0b_GUQRU0gknSWW8m1NSviX4BXACw9cL=yi1R7Q@mail.gmail.com> (raw)
In-Reply-To: <CAFzgq-zTybEQyGz0nq90u5n5JZcJzxQS_XKaTpr5POJi-tHM6A@mail.gmail.com>
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Thank you very much Chun Wang for the details below.
While I'm based in HK, but I'd like to propose that the miners in China
work together with Gavin and others to run an experiment of sorts next
month to gather more details for the community.
p.
On Sun, May 31, 2015 at 9:31 AM, Chun Wang <1240902@gmail•com> wrote:
> On Sat, May 30, 2015 at 9:57 PM, Gavin Andresen <gavinandresen@gmail•com>
> wrote:
> >> 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).
>
> If someone propagate a 20MB block, it will take at best 6 seconds for
> us to receive to verify it at current configuration, result of one
> percent orphan rate increase. Or, we can mine the next block only on
> the previous block's header, in this case, the network would see many
> more transaction-less blocks.
>
> Our orphan rate is about 0.5% over the past few months. If the network
> floods 20MB blocks, it can be well above 2%. Besides bandwidth, A 20MB
> block could contain an average of 50000 transactions, hundred of
> thousands of sigops, Do you have an estimate how long it takes on the
> submitblock rpccall?
>
> For references, our 30Mbps bandwidth in Beijing costs us 1350 dollars
> per month. We also use Aliyun and Linode cloud services for block
> propagation. As of May 2015, the price is 0.13 U.S. dollars per GB for
> 100Mbps connectivity at Aliyun. For a single cross-border TCP
> connection, it would be certainly far slower than 12.5 MB/s.
>
> I think we can accept 5MB block at most.
>
> (sorry forgot to cc to the mailing list)
>
>
> ------------------------------------------------------------------------------
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> Bitcoin-development mailing list
> Bitcoin-development@lists•sourceforge.net
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>
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next prev parent reply other threads:[~2015-05-31 2:20 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-07 22:02 [Bitcoin-development] " Matt Corallo
2015-05-07 23:24 ` Joseph Poon
2015-05-08 0:05 ` Peter Todd
2015-05-08 6:33 ` Arkady
2015-05-08 10:03 ` Mike Hearn
2015-05-08 16:37 ` Peter Todd
2015-05-08 19:47 ` Tier Nolan
2015-05-09 3:08 ` Peter Todd
2015-05-16 4:39 ` Stephen
2015-05-16 11:29 ` Tier Nolan
2015-05-16 11:25 ` Tier Nolan
2015-05-29 22:36 ` Gavin Andresen
2015-05-29 23:25 ` Matt Corallo
[not found] ` <CABsx9T3__mHZ_kseRg-w-x2=8v78QJLhe+BWPezv+hpbFCufpw@mail.gmail.com>
2015-05-30 19:32 ` Matt Corallo
2015-05-30 20:37 ` Gavin Andresen
2015-05-31 14:46 ` Jorge Timón
2015-05-31 14:49 ` Gavin Andresen
2015-05-31 14:59 ` Jorge Timón
2015-05-31 15:08 ` Gavin Andresen
2015-05-31 15:45 ` Jorge Timón
2015-05-29 23:42 ` Chun Wang
2015-05-30 13:57 ` Gavin Andresen
2015-05-30 14:08 ` Pindar Wong
2015-05-30 22:05 ` Alex Mizrahi
2015-05-30 23:16 ` Brian Hoffman
2015-05-31 0:13 ` Alex Mizrahi
2015-05-31 5:05 ` gb
[not found] ` <CAFzgq-z5WCznGhbOexS0XESNGAVauw45ewEV-1eMij7yDT61=Q@mail.gmail.com>
2015-05-31 1:31 ` [Bitcoin-development] Fwd: " Chun Wang
2015-05-31 2:20 ` Pindar Wong [this message]
2015-05-31 12:40 ` Gavin Andresen
2015-05-31 13:45 ` Alex Mizrahi
2015-05-31 14:54 ` Gavin Andresen
2015-05-31 22:55 ` Alex Mizrahi
2015-05-31 23:23 ` Ricardo Filipe
2015-05-31 23:40 ` Pindar Wong
2015-05-31 23:58 ` Ricardo Filipe
2015-06-01 0:03 ` Pindar Wong
2015-06-01 7:57 ` Alex Mizrahi
2015-06-01 10:13 ` Mike Hearn
2015-06-01 10:42 ` Pindar Wong
2015-06-01 11:26 ` Peter Todd
2015-06-01 12:19 ` Pindar Wong
2015-06-01 11:02 ` Chun Wang
2015-06-01 11:09 ` Pindar Wong
2015-06-01 11:20 ` Chun Wang
2015-06-01 13:59 ` Gavin Andresen
2015-06-01 14:08 ` Chun Wang
2015-06-01 15:33 ` Mike Hearn
2015-06-01 16:06 ` Ángel José Riesgo
2015-06-01 14:46 ` Oliver Egginger
2015-06-01 14:48 ` Chun Wang
2015-06-01 16:43 ` Yifu Guo
2015-06-01 20:01 ` Roy Badami
2015-06-01 20:15 ` Roy Badami
2015-06-01 13:21 ` Mike Hearn
2015-06-01 12:29 ` Warren Togami Jr.
2015-06-01 13:15 ` Gavin Andresen
2015-05-31 12:52 ` Gavin Andresen
2015-05-31 13:31 ` [Bitcoin-development] [Bulk] " gb
2015-05-31 19:49 ` Gavin Andresen
2015-05-31 14:17 ` [Bitcoin-development] " Dave Hudson
2015-05-31 14:34 ` Yifu Guo
2015-05-31 14:47 ` Gavin Andresen
2015-05-31 7:05 ` [Bitcoin-development] " Peter Todd
2015-05-31 12:51 ` Gavin Andresen
2015-06-01 11:12 [Bitcoin-development] Fwd: " Thy Shizzle
2015-06-01 13:06 Thy Shizzle
2015-06-01 18:19 ` Warren Togami Jr.
2015-06-01 18:30 ` Mike Hearn
2015-06-01 18:44 ` Adam Back
2015-06-01 19:23 ` Btc Drak
2015-06-01 21:32 Thy Shizzle
2015-06-01 22:13 ` Pindar Wong
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