From: Gregory Maxwell <gmaxwell@gmail•com>
To: Kaz Wesley <keziahw@gmail•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Squashing redundant tx data in blocks on the wire
Date: Thu, 31 Jul 2014 16:18:38 -0700 [thread overview]
Message-ID: <CAAS2fgR32qBtAjYNMduHTjz7ae2TSVms-2O53uTgZqtZxX+fqQ@mail.gmail.com> (raw)
In-Reply-To: <CA+iPb=FV1_0SCzcqCz+2eeQW6L18c2O2aKW4zusgNKBYirqHcA@mail.gmail.com>
On Thu, Jul 31, 2014 at 3:27 PM, Kaz Wesley <keziahw@gmail•com> wrote:
>> the FEC still lets you fill in the missing transactions without knowing in advance all that will be missing.
>
> I don't see why we need to solve that problem, since the protocol
> already involves exchanging the information necessary to determine
> (with some false positives) what a peer is missing, and needs to
> continue doing so regardless of how blocks are transmitted.
False positives, and if you have more than one peer— false negatives.
(or a rule for what you must keep which is conservative in order to
avoid creating huge storage requirements— but then also has false
negatives).
> As far as I can tell, channel memory sparseblocks achieve most of the
> possible bandwidth savings, and when FEC-based mempool synchronization
> is implemented its benefits can be applied to the sparseblocks by
> resetting the channel memory to the mutual mempool state each time
> mempool differences are exchanged. Am I missing a benefit to doing FEC
> at block forwarding time that can't be realized by FEC-based mempool
> synchronization, implemented separately from channel-memory based
> index-coding?
Yes, minimizing latency in the face of multiple peers.
Otherwise no. And certantly no reason to to implement something simple first.
next prev parent reply other threads:[~2014-07-31 23:18 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-17 21:35 Kaz Wesley
2014-07-17 22:46 ` Gavin Andresen
2014-07-17 23:26 ` Kaz Wesley
2014-07-18 13:53 ` Jeff Garzik
2014-07-18 14:53 ` Gavin Andresen
2014-07-18 15:06 ` Jeff Garzik
2014-07-18 17:39 ` Kaz Wesley
2014-07-18 17:48 ` Jeff Garzik
2014-07-18 17:53 ` Kaz Wesley
2014-07-18 19:51 ` Kaz Wesley
2014-07-18 19:55 ` Jeff Garzik
2014-07-19 0:54 ` Emin Gün Sirer
2014-07-19 1:25 ` Gregory Maxwell
2014-07-19 3:06 ` Emin Gün Sirer
2014-07-19 6:48 ` Gregory Maxwell
2014-07-19 8:06 ` Wladimir
2014-07-17 23:34 ` Gregory Maxwell
[not found] ` <CABsx9T2PSa3MpfMMDCb8ACVF5vDOZOFLEK9zfP9PakgHA4U16w@mail.gmail.com>
[not found] ` <CAPkFh0vKFnKRE-sd-Z9t1zB73VLPsiaQ3o=OYgBqqtUE4_rTaw@mail.gmail.com>
2014-07-31 20:47 ` Kaz Wesley
2014-07-31 21:29 ` Gregory Maxwell
2014-07-31 21:41 ` Kaz Wesley
2014-07-31 21:51 ` Gregory Maxwell
2014-07-31 22:27 ` Kaz Wesley
2014-07-31 23:18 ` Gregory Maxwell [this message]
2014-08-01 1:00 ` Kaz Wesley
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