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From: Jeff Garzik <jgarzik@bitpay.com>
Date: Tue, 20 May 2014 16:22:27 -0400
Message-ID: <CAJHLa0Omi=fyE0S440dAqkzvZMKcfuOTrvoYwvxW+hO76CHogA@mail.gmail.com>
To: Andy Alness <andy@coinbase.com>
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Cc: "bitcoin-development@lists.sourceforge.net"
	<bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Why are we bleeding nodes?
Precedence: list

Indeed -- you must reinvent TCP over UDP, ultimately, to handle blocks
and large TXs.


On Tue, May 20, 2014 at 4:09 PM, Andy Alness <andy@coinbase.com> wrote:
> Awesome! I'm assuming this is it:
> https://bitcointalk.org/index.php?topic=3D156769.0
>
> It would be interesting (at least to me) to take this a step further
> and offer UDP as a full TCP replacement capable of STUN-assisted NAT
> traversal and possibly swarmed blockchain syncs. It would require open
> TCP nodes to facilitate "connection" establishment. It is obviously a
> non-trivial amount of work but would be an interesting experiment.
> Maybe BitTorrent's =C2=B5TP protocol could be leveraged.
>
> On Tue, May 20, 2014 at 12:17 PM, Jeff Garzik <jgarzik@bitpay.com> wrote:
>> Yes, i spec'd out the UDP traversal of the P2P protocol.  It seems
>> reasonable especially for "inv" messages.
>>
>> On Tue, May 20, 2014 at 2:46 PM, Andy Alness <andy@coinbase.com> wrote:
>>> Has there ever been serious discussion on extending the protocol to
>>> support UDP transport? That would allow for NAT traversal and for many
>>> more people to run effective nodes. I'm also curious if it could be
>>> made improve block propagation time.
>>>
>>> On Tue, May 20, 2014 at 7:52 AM, Gmail <will.yager@gmail.com> wrote:
>>>> Unlikely. I doubt any significant portion of miners in china will cont=
inue to mine on a china-specific chain, since it will certainly be outmined=
 by non-Chinese miners, and will be orphaned eventually.
>>>>
>>>> More likely is that mining interests in china will make special arrang=
ements to circumvent the GFwOC.
>>>>
>>>> Users who can't access the worldwide blockchain will notice horrendous=
ly slow confirmation times and other side effects.
>>>>
>>>>> On May 20, 2014, at 10:37, Eugen Leitl <eugen@leitl.org>
>>>>>
>>>>> Could a blockchain fork due to network split happen?
>>>>>
>>>>
>>>> ----------------------------------------------------------------------=
--------
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>>>
>>>
>>>
>>> --
>>> Andy Alness
>>> Software Engineer
>>> Coinbase
>>> San Francisco, CA
>>>
>>> -----------------------------------------------------------------------=
-------
>>> "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE
>>> Instantly run your Selenium tests across 300+ browser/OS combos.
>>> Get unparalleled scalability from the best Selenium testing platform av=
ailable
>>> Simple to use. Nothing to install. Get started now for free."
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>>
>>
>>
>> --
>> Jeff Garzik
>> Bitcoin core developer and open source evangelist
>> BitPay, Inc.      https://bitpay.com/
>
>
>
> --
> Andy Alness
> Software Engineer
> Coinbase
> San Francisco, CA


--=20
Jeff Garzik
Bitcoin core developer and open source evangelist
BitPay, Inc.      https://bitpay.com/