From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WcHEi-0000nO-1C for bitcoin-development@lists.sourceforge.net; Mon, 21 Apr 2014 16:38:28 +0000 Received: from mail-pd0-f176.google.com ([209.85.192.176]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1WcHEg-0001M1-WB for bitcoin-development@lists.sourceforge.net; Mon, 21 Apr 2014 16:38:28 +0000 Received: by mail-pd0-f176.google.com with SMTP id r10so3845371pdi.35 for ; Mon, 21 Apr 2014 09:38:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:organization:user-agent :mime-version:to:cc:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=cptUNMrrJPJ1wRb2y0IziS7ms6lw0ROkCJlyfm/7Mq4=; b=BPNnwR+Nx0+PDcbyY3+D8jmPZBFpdy7F5IilrCIpBGkTly9JPaGzlp8tH73wu/3lXY VpeW0EXuoUCb1mEBafh3aNgXMYKyrrVv93nKDJDyoiY/DA19HnR4cH1DZt1VdOJoAyG4 JWmqjyPBXSVv5ninUQJ3MVejv4t6Q9BXuAZtsiYJ3TPDmbLiRTYpElaIsLSATB7B3q+t /F3Ffv9U40rOUcRlD+A4VW6FeOThhrORRiFmsVai2TPOf/DxDGgKxw5OD5LeXPZMvi6Z NwQizurou5MIT6VxNfeYxa8ZUdhTIS5pcnegdiFJQwqDQByrIDOAL1niwURDemKgDsjU EBgg== X-Gm-Message-State: ALoCoQnFoLmJgWZ45wJhjqySigdCKB5CfdMXe5XW25ba+StvwlrGMUXbZ7bnbIJYhohnqm4QvbVw X-Received: by 10.68.135.137 with SMTP id ps9mr3177484pbb.160.1398098300879; Mon, 21 Apr 2014 09:38:20 -0700 (PDT) Received: from [192.168.127.231] (50-0-36-93.dsl.dynamic.sonic.net. [50.0.36.93]) by mx.google.com with ESMTPSA id n6sm79120928pbj.22.2014.04.21.09.38.18 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 21 Apr 2014 09:38:20 -0700 (PDT) Message-ID: <53554979.9020206@monetize.io> Date: Mon, 21 Apr 2014 09:38:17 -0700 From: Mark Friedenbach Organization: Monetize.io Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Paul Lyon , Peter Todd , Jonathan Levin References: , <52CDA01B-13BF-4BB8-AC9A-5FBBB324FD15@sant.ox.ac.uk>, , , <53554089.1010503@monetize.io> In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [209.85.192.176 listed in list.dnswl.org] X-Headers-End: 1WcHEg-0001M1-WB Cc: "bitcoin-development@lists.sourceforge.net" Subject: Re: [Bitcoin-development] Economics of information propagation X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 Apr 2014 16:38:28 -0000 Yes, it certainly can be improved in this way. You can even extend the idea to distribute partial proofs of work (block headers + Merkle lists which represent significant but not sufficient work), and 'prime' your memory pools with the transactions contained within. This is, btw, basically what p2pool does, which is why last time I calculated you get roughly 1% better return from p2pool than a zero-fee mining pool would get you, specifically because of the lower stale rate. On 04/21/2014 09:22 AM, Paul Lyon wrote: > I haven't done the math on this, so it may be a terrible idea. :) > > I've been wondering if block propagation times could also be improved by > allowing peers to request the list of transaction hashes that make up a > block, and then making a follow-up request to only download any > transactions not currently known. I'm not sure what percentage of > transactions a node will usually already have when it receives a new > block, but if it's high I figure this could be beneficial. >