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| author | Marcel Jamin <marcel@jamin.net> | 2015-07-23 21:56:36 +0200 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2015-07-23 19:56:38 +0000 |
| commit | bc495148f398f8c4262450ec2332a2d0fefc6cee (patch) | |
| tree | 8e28f2511c9e16ef655bc84e033da4b0c5d8dceb | |
| parent | 3b6ca7495280dd6928b58d20daf1c51ed870c8fd (diff) | |
| download | pi-bitcoindev-bc495148f398f8c4262450ec2332a2d0fefc6cee.tar.gz pi-bitcoindev-bc495148f398f8c4262450ec2332a2d0fefc6cee.zip | |
Re: [bitcoin-dev] Bitcoin Node Speed Test
| -rw-r--r-- | 9c/ff46a5579c6d42bd056085d746f541a4034946 | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/9c/ff46a5579c6d42bd056085d746f541a4034946 b/9c/ff46a5579c6d42bd056085d746f541a4034946 new file mode 100644 index 000000000..82d436a18 --- /dev/null +++ b/9c/ff46a5579c6d42bd056085d746f541a4034946 @@ -0,0 +1,172 @@ +Return-Path: <marcel@jamin.net> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id 44DF67AD + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 23 Jul 2015 19:56:38 +0000 (UTC) +X-Greylist: whitelisted by SQLgrey-1.7.6 +Received: from mail-yk0-f174.google.com (mail-yk0-f174.google.com + [209.85.160.174]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 9700614F + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 23 Jul 2015 19:56:37 +0000 (UTC) +Received: by ykay190 with SMTP id y190so2505169yka.3 + for <bitcoin-dev@lists.linuxfoundation.org>; + Thu, 23 Jul 2015 12:56:37 -0700 (PDT) +X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=1e100.net; s=20130820; + h=x-gm-message-state:mime-version:in-reply-to:references:date + :message-id:subject:from:to:cc:content-type; + bh=AICfTSUARUEcoire4r/lBVSxyujYg4pmOc1HseWNqg8=; + b=En1NCpqQQZ5/eolxQspGWBvYCodk6ukEPZhjiZwyZ8ta4vJo+4BY4RqzSaPPLMCa4N + nblUZeLwBAdqI2Ih1Za8ItEUELfb6iVxnyq/r2AcuKnNcKHJXc7Dt597czQERU3eNceU + mqbl9BaTt/ZilDTP4tVPMtCrlYO8+nvoRaTAP6I2vOLOOpp5kgXhH37N09KohDG/cZ8Z + aMNXH2yoWPuZ3mRhGuGb7JAYvqQiD5+0INeQk4Ofh5CHi1Y7L1M003qcMbqUieinGNzB + 4E95Vc5yBB0hjRhfOWONMLhIa1svbfyz52E+Usy0AcLlVwZFIfDbpkulaKqYhnLQgsSy + 7u4Q== +X-Gm-Message-State: ALoCoQn2SrunMEPb7TAsjSkmb4Ndd+UDaJ3qBAzWjj+5NEdAsVyVoyLFLASmDC3TVDXd2CJzxZTs +MIME-Version: 1.0 +X-Received: by 10.129.44.136 with SMTP id s130mr10365271yws.80.1437681396874; + Thu, 23 Jul 2015 12:56:36 -0700 (PDT) +Received: by 10.13.224.69 with HTTP; Thu, 23 Jul 2015 12:56:36 -0700 (PDT) +In-Reply-To: <25607701-D3ED-4D0D-A5B3-C02B727671BF@petertodd.org> +References: <trinity-c97bc41b-a953-4580-b2d2-ebdda9eb96b2-1437661199263@3capp-mailcom-bs02> + <25607701-D3ED-4D0D-A5B3-C02B727671BF@petertodd.org> +Date: Thu, 23 Jul 2015 21:56:36 +0200 +Message-ID: <CAAUq485RqbNpBa6i34H517Oo4+MHkT683inwU-sMX3Y=vBTwqg@mail.gmail.com> +From: Marcel Jamin <marcel@jamin.net> +To: Peter Todd <pete@petertodd.org> +Content-Type: multipart/alternative; boundary=001a1141e5f2f63297051b904820 +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: slurms--- via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> +Subject: Re: [bitcoin-dev] Bitcoin Node Speed Test +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, 23 Jul 2015 19:56:38 -0000 + +--001a1141e5f2f63297051b904820 +Content-Type: text/plain; charset=UTF-8 + +He measured the upload capacity of the peers by downloading from them, or +am I being dumb? :) + + +2015-07-23 18:05 GMT+02:00 Peter Todd via bitcoin-dev < +bitcoin-dev@lists.linuxfoundation.org>: + +> -----BEGIN PGP SIGNED MESSAGE----- +> Hash: SHA256 +> +> +> +> On 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev < +> bitcoin-dev@lists.linuxfoundation.org> wrote: +> >This does not support the theory that the network has the available +> >bandwidth for increased block sizes, as in its current state 37% of +> >nodes would fail to upload a 20MB block to a single peer in under 20 +> >seconds (referencing a number quoted by Gavin). If the bar for +> >suitability is placed at taking only 1% of the block time (6 seconds) +> >to upload one block to one peer, then 69% of the network fails for 20MB +> >blocks. For comparison, only 10% fail this metric for 1MB blocks. +> +> Note how due to bandwidth being generally asymetric your findings are +> probably optimistic - you've measured download capacity. On top of that +> upload is further reduced by the fact that multiple peers at once need to +> be sent blocks for reliability. +> +> Secondly you're measuring a network that isn't under attack - we need +> significant additional margin to resist attack as performance is +> consensus-critical. +> +> -----BEGIN PGP SIGNATURE----- +> +> iQE9BAEBCAAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJVsRCj +> AAoJEMCF8hzn9Lnc47AIAIQbznavjd2Rbqxeq5a3GLqeYoI4BZIQYqfWky+6OQtq +> yGRKaqPtGuES5y9L0k7efivT385mOl87PWnWMy61xxZ9FJgoS+YHkEx8K4tfgfA2 +> yLOKzeFSar2ROCcjHYyPWa2XXjRbNmiLzfNuQyIBArg/Ch9//iXUUM+GG0mChF5k +> nUxLstXgXDNh5H8xkHeLi4lEbt9HFiwcZnT1Tzeo2dvVTujrtyNb/zEhNZScMXDc +> UOlT8rBLxzHlytKdXt1GNKIq0feTRJNbreBh7/EB4nYTT54CItaaVXul0LdHd5/2 +> kgKtdbUdeyaRUKrKcvxiuIwclyoOuRQp0DZThsB262o= +> =tBUM +> -----END PGP SIGNATURE----- +> +> _______________________________________________ +> bitcoin-dev mailing list +> bitcoin-dev@lists.linuxfoundation.org +> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev +> + +--001a1141e5f2f63297051b904820 +Content-Type: text/html; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable + +<div dir=3D"ltr">He measured the upload capacity of the peers by downloadin= +g from them, or am I being dumb? :)<div><br><div class=3D"gmail_extra"><br>= +<div class=3D"gmail_quote">2015-07-23 18:05 GMT+02:00 Peter Todd via bitcoi= +n-dev <span dir=3D"ltr"><<a href=3D"mailto:bitcoin-dev@lists.linuxfounda= +tion.org" target=3D"_blank">bitcoin-dev@lists.linuxfoundation.org</a>></= +span>:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bord= +er-left:1px #ccc solid;padding-left:1ex">-----BEGIN PGP SIGNED MESSAGE-----= +<br> +Hash: SHA256<br> +<span class=3D""><br> +<br> +<br> +On 23 July 2015 10:19:59 GMT-04:00, slurms--- via bitcoin-dev <<a href= +=3D"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.linuxfo= +undation.org</a>> wrote:<br> +>This does not support the theory that the network has the available<br> +>bandwidth for increased block sizes, as in its current state 37% of<br> +>nodes would fail to upload a 20MB block to a single peer in under 20<br= +> +>seconds (referencing a number quoted by Gavin). If the bar for<br> +>suitability is placed at taking only 1% of the block time (6 seconds)<b= +r> +>to upload one block to one peer, then 69% of the network fails for 20MB= +<br> +>blocks. For comparison, only 10% fail this metric for 1MB blocks.<br> +<br> +</span>Note how due to bandwidth being generally asymetric your findings ar= +e probably optimistic - you've measured download capacity. On top of th= +at upload is further reduced by the fact that multiple peers at once need t= +o be sent blocks for reliability.<br> +<br> +Secondly you're measuring a network that isn't under attack - we ne= +ed significant additional margin to resist attack as performance is consens= +us-critical.<br> +<br> +-----BEGIN PGP SIGNATURE-----<br> +<br> +iQE9BAEBCAAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJVsRCj<br> +AAoJEMCF8hzn9Lnc47AIAIQbznavjd2Rbqxeq5a3GLqeYoI4BZIQYqfWky+6OQtq<br> +yGRKaqPtGuES5y9L0k7efivT385mOl87PWnWMy61xxZ9FJgoS+YHkEx8K4tfgfA2<br> +yLOKzeFSar2ROCcjHYyPWa2XXjRbNmiLzfNuQyIBArg/Ch9//iXUUM+GG0mChF5k<br> +nUxLstXgXDNh5H8xkHeLi4lEbt9HFiwcZnT1Tzeo2dvVTujrtyNb/zEhNZScMXDc<br> +UOlT8rBLxzHlytKdXt1GNKIq0feTRJNbreBh7/EB4nYTT54CItaaVXul0LdHd5/2<br> +kgKtdbUdeyaRUKrKcvxiuIwclyoOuRQp0DZThsB262o=3D<br> +=3DtBUM<br> +-----END PGP SIGNATURE-----<br> +<div class=3D"HOEnZb"><div class=3D"h5"><br> +_______________________________________________<br> +bitcoin-dev mailing list<br> +<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.= +linuxfoundation.org</a><br> +<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" = +rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.org/mail= +man/listinfo/bitcoin-dev</a><br> +</div></div></blockquote></div><br></div></div></div> + +--001a1141e5f2f63297051b904820-- + |