Re: [Bitcoin-development] Reconsidering block version number use

[Peter Vessenes <peter@coinlab.com>]

[-- Attachment #1: Type: text/plain, Size: 1895 bytes --]

I think it would be great to have more nonce space with less merkle
calculation; keeping track of all possible versions of a block already
takes real RAM, real computation. Being able to change one bit in the
header and send out a new block for checking would ease our pool server
work by a real amount, somewhat on the work generation side, but also on
the checking old work side; we'll have a lot fewer unique transaction /
coinbase sets to hold on to for checking when we get back a solution.

Peter


On Tue, Jul 24, 2012 at 4:58 PM, Mike Hearn <mike@plan99.net> wrote:

> > That'd be 7 bytes of nonce in the block header, which is
> >   72,057,594,037,927,936  ~ 72 petahashes = 72,000 terahashes
> >
> > So: the changes for version 2 blocks would be "has height in the
> > coinbase, and has a 1-byte version number with a 3-byte extranonce."
>
> I don't understand why more nonce bits are necessary. Is it really
> impossible for a multi-core CPU to keep up with the merkle root
> re-calculation and keep an ASIC miner fed, or is this working around a
> performance bottleneck somewhere else?
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
>



-- 
------------------------------

[image: CoinLab Logo]PETER VESSENES
CEO

*peter@coinlab.com * /  206.486.6856  / SKYPE: vessenes
811 FIRST AVENUE  /  SUITE 480  /  SEATTLE, WA 98104

[-- Attachment #2: Type: text/html, Size: 3546 bytes --]