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From: Chris Wardell <wardell.c@gmail.com>
To: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] Dynamically Controlled Bitcoin Block Size Max Cap
Date: Tue, 18 Aug 2015 17:17:06 -0400	[thread overview]
Message-ID: <CAEieSeSNusgBK4LX9SWT4iENQo66EbXRbha6AKQv_3dh8koz4g@mail.gmail.com> (raw)
In-Reply-To: <CAJN5wHU59N68H7U-reANK9u=dF+906y-fyOj2cYRSFXZyLAT0g@mail.gmail.com>

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I agree with the simplicity of this approach and with removing the
reduction step... it's unlikely the block size would ever need to be
reduced, only increased with demand?

I like this solution better than either kicking the can, or raising the
block size based on chain height (another dynamic solution).

-Chris


On Tue, Aug 18, 2015 at 4:58 PM, Danny Thorpe via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> I like the simplicity of this approach.  Demand driven response.
>
> Is there really a need to reduce the max block size at all?  It is just a
> maximum limit, not a required size for every block.  If a seasonal
> transaction surge bumps the max block size limit up a notch, what harm is
> there in leaving the max block size limit at the "high water mark"
> indefinitely, even though periods of decreased transaction volume?
>
> I'd argue to remove the reduction step, making the max block size
> calculation a monotonic increasing function. Cut the complexity in half.
>
> -Danny
>
> On Tue, Aug 18, 2015 at 5:13 AM, Upal Chakraborty via bitcoin-dev <
> bitcoin-dev@lists.linuxfoundation.org> wrote:
>
>> Regarding:
>> http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2015-August/010295.html
>>
>>
>> I am arguing with the following statement here...
>>
>> *I see problems to this approach. The biggest one I see is that a miner
>>> with 11% of hash power could sabotage block size increases by only ever
>>> mining empty blocks.*
>>
>>
>>
>> First, I would like to argue from economics' point of view. If someone
>> wants to hold back the block size increase with 11% hash power by mining
>> empty blocks, he has to sacrifice Tx fees, which is not economical. 11%
>> hash power will most likely be a pool and pool miners will find out soon
>> that they are losing Tx fees because of pool owner's intention. Hence,
>> they'll switch pool and pool owner will lose out. This is the same reason
>> why 51% attack will never happen, even if a pool gets more than 51% hash
>> power.
>>
>>
>> Next, I would like to propose a slightly modified technical solution to
>> this problem in algorithmic format...
>>
>> If more than 50% of block's size, found in the first 2000 of the last
>> difficulty period, is more than 90% MaxBlockSize
>>          Double MaxBlockSize
>> Else if more than 90% of block's size, found in the first 2000 of the
>> last difficulty period, is less than 50% MaxBlockSize
>>          Half MaxBlockSize
>> Else
>>          Keep the same MaxBlockSize
>>
>> This is how, those who want to stop increase, need to have more than 50%
>> hash power. Those who want to stop decrease, need to have more than 10%
>> hash power, but must mine more than 50% of MaxBlockSize in all blocks. In
>> this approach, not only miners, but also the end user have their say.
>> Because, end users will fill up the mempool, from where miners will take Tx
>> to fill up the blocks. Please note that, taking first 2000 of the last 2016
>> blocks is important to avoid data discrepancy among different nodes due to
>> orphan blocks. It is assumed that a chain can not be orphaned after having
>> 16 confirmation.
>>
>> Looking for comments.
>>
>>
>>
>>
>>
>> _______________________________________________
>> 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
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>

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  reply	other threads:[~2015-08-18 21:17 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-18 12:13 [bitcoin-dev] Dynamically Controlled Bitcoin Block Size Max Cap Upal Chakraborty
2015-08-18 17:26 ` Chris Wardell
2015-08-20  7:31   ` Jorge Timón
2015-08-20 10:23     ` Milly Bitcoin
2015-08-21  0:25       ` Tom Harding
2015-08-21  0:37         ` Peter Todd
2015-08-21 16:52           ` Tom Harding
2015-08-21 22:21             ` Peter Todd
2015-08-21 23:16               ` Tom Harding
2015-08-22  0:01                 ` Peter Todd
2015-08-22  3:21                   ` Jorge Timón
2015-08-22  6:26                     ` Peter Todd
2015-08-23 23:41                   ` Tom Harding
2015-08-24  2:27                     ` Jorge Timón
2015-08-21  0:45         ` Milly Bitcoin
2015-08-21  0:58           ` Peter Todd
2015-08-21  1:30             ` Milly Bitcoin
2015-08-21 20:28       ` Jorge Timón
2015-08-21 12:13     ` Sriram Karra
2015-08-21 20:09       ` Jorge Timón
2015-08-18 19:44 ` cedric perronnet
2015-08-18 20:58 ` Danny Thorpe
2015-08-18 21:17   ` Chris Wardell [this message]
2015-08-19 17:21   ` Upal Chakraborty
  -- strict thread matches above, loose matches on Subject: below --
2015-08-21 21:45 Upal Chakraborty
2015-08-20 15:02 Upal Chakraborty
2015-08-17 11:57 Rodney Morris
2015-08-17 12:38 ` Angel Leon
2015-08-17 12:43 ` Tier Nolan
2015-08-17  9:44 Upal Chakraborty
2015-08-17  9:54 ` Levin Keller
2015-08-17  9:59 ` Patrick Strateman
2015-08-17 10:51   ` Btc Drak

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