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author | Gary Mulder <flyingkiwiguy@gmail.com> | 2015-07-30 17:56:23 +0100 |
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committer | bitcoindev <bitcoindev@gnusha.org> | 2015-07-30 16:57:06 +0000 |
commit | 1f793e9bfe7232f7617ff4b7b05c05b256ce1c77 (patch) | |
tree | ecdf76dc52591ef0e58e1aa65e88f2860da97b74 | |
parent | 89b95b965be040a8130655ef7e954531b7d76ba9 (diff) | |
download | pi-bitcoindev-1f793e9bfe7232f7617ff4b7b05c05b256ce1c77.tar.gz pi-bitcoindev-1f793e9bfe7232f7617ff4b7b05c05b256ce1c77.zip |
Re: [bitcoin-dev] Block size following technological growth
-rw-r--r-- | de/b9aed9a6e185f504e5595312a7974855ed70f6 | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/de/b9aed9a6e185f504e5595312a7974855ed70f6 b/de/b9aed9a6e185f504e5595312a7974855ed70f6 new file mode 100644 index 000000000..1a0e38b8b --- /dev/null +++ b/de/b9aed9a6e185f504e5595312a7974855ed70f6 @@ -0,0 +1,136 @@ +Return-Path: <flyingkiwiguy@gmail.com> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id CF01A514 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 30 Jul 2015 16:57:06 +0000 (UTC) +X-Greylist: whitelisted by SQLgrey-1.7.6 +Received: from mail-yk0-f180.google.com (mail-yk0-f180.google.com + [209.85.160.180]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 9F990ED + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 30 Jul 2015 16:57:03 +0000 (UTC) +Received: by ykax123 with SMTP id x123so38990354yka.1 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 30 Jul 2015 09:57:03 -0700 (PDT) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; + h=mime-version:in-reply-to:references:from:date:message-id:subject:to + :cc:content-type; + bh=nXwo/zgjTWngypPR+b4He1G0eWcQnqL0b6Kec3+B8WM=; + b=ttpWrITwPo6OZZ99J2478zwrAfMEl9ligHxu8hkyyUOyv07WChvgbxrF3R5NxCFmu2 + uMReQZ+Ht3b7mXG4f/ro7vs1drF9LE67yjYO5zfkJitaG8p0IwIwxz56qCupnMfTAOj9 + y0luh+8lQ2bCKIsltBqOOnKaSVPtfRlTDmyeKlr33VBJ3eY2B5eQUDijYkPytQWcvfXG + fPHeU/3xN+UT32LtOi83Wr4k+ygKUfKWren8qhbDfpMHpQXhqsnWsBoV6vEljhL7DSEm + jscLO2X9ateG3cVQFh2haaOE92uCS/mVFKW00p0d8axObajiw1bvFD+pOnjUPSgvc1we + o/0Q== +X-Received: by 10.13.204.150 with SMTP id o144mr52859464ywd.54.1438275423023; + Thu, 30 Jul 2015 09:57:03 -0700 (PDT) +MIME-Version: 1.0 +Received: by 10.129.74.8 with HTTP; Thu, 30 Jul 2015 09:56:23 -0700 (PDT) +In-Reply-To: <CABm2gDrHjfkC+whh3Vh2LZNdSR1WSAXpNitR-jEdxtbKj7J25g@mail.gmail.com> +References: <CAPg+sBj-wA1DMrwkQRWnzQoB5NR-q=2-5=WDAAUYfSpXRZSTqw@mail.gmail.com> + <CABm2gDrHjfkC+whh3Vh2LZNdSR1WSAXpNitR-jEdxtbKj7J25g@mail.gmail.com> +From: Gary Mulder <flyingkiwiguy@gmail.com> +Date: Thu, 30 Jul 2015 17:56:23 +0100 +Message-ID: <CAKy9zTA1j6311Y8uo-c_z2JQr8gEwf_gH+HH56rRgZac9fqh9Q@mail.gmail.com> +To: =?UTF-8?B?Sm9yZ2UgVGltw7Nu?= <jtimon@jtimon.cc> +Content-Type: multipart/alternative; boundary=001a114e43a6adb56c051c1a9766 +X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,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 <bitcoin-dev@lists.linuxfoundation.org> +Subject: Re: [bitcoin-dev] Block size following technological growth +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org> +List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe> +List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/> +List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org> +List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help> +List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe> +X-List-Received-Date: Thu, 30 Jul 2015 16:57:06 -0000 + +--001a114e43a6adb56c051c1a9766 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable + +On 30 July 2015 at 16:12, Jorge Tim=C3=B3n <bitcoin-dev@lists.linuxfoundati= +on.org +> wrote: + +> 1) Unlike previous blocksize hardfork proposals, this uses median time +> instead of block.nTime for activation. I like that more but my +> preference is still using height for everything. But that discussion +> is not specific to this proposal, so it's better if we discuss that +> for all of them here: +> +> http://lists.linuxfoundation.org/pipermail/bitcoin-dev/2015-July/009731.h= +tml + + +Note that a "median" is a special case of a 50% percentile. If you desire +to apply a more stringent criteria you can use the 75th or even 90th +percentile. + +https://en.wikipedia.org/wiki/Percentile + +Perhaps if a statistician (i.e. not me) could be found to offer her +services, she could become a resource for helping selecting the most +appropriate statistical algorithms on request (and implemented Integer math +as per Gavin, from memory), considering the consequences of learning +post-fork that a "bad statistical model" was chosen. + +e.g. an exponentially weighted moving average is usually much less volatile +and harder to manipulate than a simple moving average, but still can +"respond" to short term drivers. + +Regards, +Gary + +--001a114e43a6adb56c051c1a9766 +Content-Type: text/html; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable + +<div dir=3D"ltr"><div class=3D"gmail_extra"><span style=3D"font-size:12.800= +0001907349px">On 30 July 2015 at 16:12, Jorge Tim=C3=B3n=C2=A0</span><span = +dir=3D"ltr" style=3D"font-size:12.8000001907349px"><<a href=3D"mailto:bi= +tcoin-dev@lists.linuxfoundation.org" target=3D"_blank">bitcoin-dev@lists.li= +nuxfoundation.org</a>></span><span style=3D"font-size:12.8000001907349px= +">=C2=A0wrote:</span><br style=3D"font-size:12.8000001907349px"><blockquote= + class=3D"gmail_quote" style=3D"font-size:12.8000001907349px;margin:0px 0px= + 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-= +left-style:solid;padding-left:1ex">1) Unlike previous blocksize hardfork pr= +oposals, this uses median time<br>instead of block.nTime for activation. I = +like that more but my<br>preference is still using height for everything. B= +ut that discussion<br>is not specific to this proposal, so it's better = +if we discuss that<br>for all of them here:<br><a href=3D"http://lists.linu= +xfoundation.org/pipermail/bitcoin-dev/2015-July/009731.html" rel=3D"norefer= +rer" target=3D"_blank">http://lists.linuxfoundation.org/pipermail/bitcoin-d= +ev/2015-July/009731.html</a></blockquote><div style=3D"font-size:12.8000001= +907349px"><br></div><div style=3D"font-size:12.8000001907349px">Note that a= + "median" is a special case of a 50% percentile. If you desire to= + apply a more stringent criteria you can use the 75th or even 90th percenti= +le.</div><div style=3D"font-size:12.8000001907349px"><br></div><div style= +=3D"font-size:12.8000001907349px"><a href=3D"https://en.wikipedia.org/wiki/= +Percentile" target=3D"_blank">https://en.wikipedia.org/wiki/Percentile</a><= +br></div><div style=3D"font-size:12.8000001907349px"><br></div><div style= +=3D"font-size:12.8000001907349px">Perhaps if a statistician (i.e. not me) c= +ould be found to offer her services, she could become a resource for helpin= +g selecting the most appropriate statistical algorithms on request (and imp= +lemented Integer math as per Gavin, from memory), considering the consequen= +ces of learning post-fork that a "bad statistical model" was chos= +en.</div><div style=3D"font-size:12.8000001907349px"><br></div><div style= +=3D"font-size:12.8000001907349px">e.g. an exponentially weighted moving ave= +rage is usually much less volatile and harder to manipulate than a simple m= +oving average, but still can "respond" to short term drivers.=C2= +=A0</div><div style=3D"font-size:12.8000001907349px"><br></div><div style= +=3D"font-size:12.8000001907349px">Regards,</div><div style=3D"font-size:12.= +8000001907349px">Gary</div></div></div> + +--001a114e43a6adb56c051c1a9766-- + |