Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 257DAC3D for ; Tue, 8 Dec 2015 23:49:06 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from d.mail.sonic.net (d.mail.sonic.net [64.142.111.50]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id CD1D6145 for ; Tue, 8 Dec 2015 23:49:05 +0000 (UTC) Received: from [192.168.0.136] (1-64-179-042.static.netvigator.com [1.64.179.42]) (authenticated bits=0) by d.mail.sonic.net (8.15.1/8.15.1) with ESMTPSA id tB8NmxTu011851 (version=TLSv1 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Tue, 8 Dec 2015 15:49:02 -0800 Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: multipart/signed; boundary="Apple-Mail=_997F15C3-CDF7-4694-A002-F54D5AEF78E4"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Pgp-Agent: GPGMail 2.5.2 From: Jonathan Toomim In-Reply-To: Date: Wed, 9 Dec 2015 07:48:58 +0800 Message-Id: <5F73C59C-7939-4937-839D-CA93880CB21F@toom.im> References: To: Gregory Maxwell X-Mailer: Apple Mail (2.1878.6) X-Sonic-CAuth: UmFuZG9tSVbieX+Bk351VBAXA4tfrD2g3f3Uk+DFMHl96GFHmcGKAqg7TsAuu9pXa+id0hX7uYG4EyoZDptIKRlhu2T3yUU/ X-Sonic-ID: C;uhRqQAae5RGZOsgxU3XIUw== M;IHv2QQae5RGZOsgxU3XIUw== X-Sonic-Spam-Details: 0.0/5.0 by cerberusd X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,HTML_MESSAGE, 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 Subject: Re: [bitcoin-dev] Capacity increases for the Bitcoin system. 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, 08 Dec 2015 23:49:06 -0000 --Apple-Mail=_997F15C3-CDF7-4694-A002-F54D5AEF78E4 Content-Type: multipart/alternative; boundary="Apple-Mail=_6D85F9D4-3680-461F-8CA4-ED05B6159553" --Apple-Mail=_6D85F9D4-3680-461F-8CA4-ED05B6159553 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Dec 8, 2015, at 6:02 AM, Gregory Maxwell via bitcoin-dev = wrote: > The particular proposal amounts to a 4MB blocksize increase at worst. I understood that SegWit would allow about 1.75 MB of data in the = average case while also allowing up to 4 MB of data in the worst case. = This means that the mining and block distribution network would need a = larger safety factor to deal with worst-case situations, right? If you = want to make sure that nothing goes wrong when everything is at its = worst, you need to size your network pipes to handle 4 MB in a timely = (DoS-resistant) fashion, but you'd normally only be able to use 1.75 MB = of it. It seems to me that it would be safer to use a 3 MB limit, and = that way you'd also be able to use 3 MB of actual transactions. As an accounting trick to bypass the 1 MB limit, SegWit sounds like it = might make things less well accounted for. --Apple-Mail=_6D85F9D4-3680-461F-8CA4-ED05B6159553 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii

On Dec 8, 2015, at 6:02 AM, Gregory Maxwell via = bitcoin-dev <bitcoin-dev@lists.li= nuxfoundation.org> wrote:

The particular proposal amounts to a 4MB blocksize increase = at worst.

I understood that = SegWit would allow about 1.75 MB of data in the average case while also = allowing up to 4 MB of data in the worst case. This means that the = mining and block distribution network would need a larger safety factor = to deal with worst-case situations, right? If you want to make sure that = nothing goes wrong when everything is at its worst, you need to size = your network pipes to handle 4 MB in a timely (DoS-resistant) fashion, = but you'd normally only be able to use 1.75 MB of it. It seems to me = that it would be safer to use a 3 MB limit, and that way you'd also be = able to use 3 MB of actual transactions.

As an = accounting trick to bypass the 1 MB limit, SegWit sounds like it might = make things less well accounted = for.

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