From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 5B66C93E for ; Tue, 23 Jun 2015 19:28:49 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail148161.authsmtp.com (outmail148161.authsmtp.com [62.13.148.161]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id A244C156 for ; Tue, 23 Jun 2015 19:28:48 +0000 (UTC) Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235]) by punt15.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t5NJShDf009874; Tue, 23 Jun 2015 20:28:43 +0100 (BST) Received: from muck ([209.141.138.18]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t5NJSduf034070 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Tue, 23 Jun 2015 20:28:41 +0100 (BST) Date: Tue, 23 Jun 2015 15:28:38 -0400 From: Peter Todd To: Gavin Andresen Message-ID: <20150623192838.GG30235@muck> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="eVzOFob/8UvintSX" Content-Disposition: inline In-Reply-To: X-Server-Quench: 0e9bcf15-19de-11e5-b396-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdAEUEkAaAgsB AmMbWVReUlV7XWE7 aQpYcwRZY1RPXA10 UUBWR1pVCwQmRRl/ fH1KF09ydAFGf34+ ZEdiVnAVXBFzJxUr Q0tJFGRSMHphaTUa TRJbfgVJcANIexZF O1F6ACIKLwdSbGoL FQ4vNDcwO3BTJTpg Ci0XJFwOCWwqJnZu Dx4DDTgjWFYORyg/ MhgrYlQYG00Sel4z I1ZpWFQTKRIbEQA2 X-Authentic-SMTP: 61633532353630.1023:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 209.141.138.18/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: bitcoin-dev@lists.linuxfoundation.org Subject: Re: [bitcoin-dev] Draft BIP : fixed-schedule block size increase X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Development Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Jun 2015 19:28:49 -0000 --eVzOFob/8UvintSX Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jun 22, 2015 at 02:18:19PM -0400, Gavin Andresen wrote: > =3D=3DRationale=3D=3D >=20 > The initial size of 8,000,000 bytes was chosen after testing the current > reference implementation code with larger block sizes and receiving > feedback from miners stuck behind bandwidth-constrained networks (in > particular, Chinese miners behind the Great Firewall of China). >=20 > The doubling interval was chosen based on long-term growth trends for CPU > power, storage, and Internet bandwidth. The 20-year limit was chosen > because exponential growth cannot continue forever. Wladimir noted that 'The original presented intention of block size increase was a one-time "scaling" to grant time for more decentralizing solutions to develop' Comments? In particular, if bandwidth scaling doesn't go according to your plan, e.g. the exponential exponent is too large, perhaps due to technological growth not keeping pace, or the political realities of actual bandwidth deployment making theoretical technological growth irrelevant, what mechanism will prevent centralization? (if any) --=20 'peter'[:-1]@petertodd.org 000000000000000008c0be16e152f86ab3a271a13c3f41c56228d72990abf7bd --eVzOFob/8UvintSX Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJVibNjXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAwOGMwYmUxNmUxNTJmODZhYjNhMjcxYTEzYzNmNDFjNTYy MjhkNzI5OTBhYmY3YmQvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQwIXyHOf0udx3Nwf+P7rvhuIjCxcIVqomoJrcev2p rbNywwk7GfiUEe10EPafJJfdozkKRIRj8IkHpVQ6QSUCyQgk1XRu2bL/rwIZfWXX HCqRDYtWezcm7SLhdnyxihk66uvZ5QvmDfi3WBKFriJUruHVipW5DYS4rACVO1S7 P75GYJcukOIBFwNqIOG+CMK4s0E24xk6XEJysMKN3qXU3raVPAd7dpRFcsJMHBqp 0sFbyrI/t15nL3sHwIUfTztCNRxqzOEh6JIeJr/Eq7GIgJPh8QsQ5I+j+Uodv8t9 /XI1VbnIQ4KrtBVUqtckAjs8mQs8mwvYWr6sBIqavpgBHh9hzOW71J1II0vhxw== =PMMc -----END PGP SIGNATURE----- --eVzOFob/8UvintSX--